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All Subsea Cables Renewable Energy Safety News Downloads

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Media Gallery

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Emergency Contact Numbers

The numbers below are the emergency contact numbers for Subsea Cables and Renewable Energy Structures. These phone numbers relate to each offshore structure and may be used in case of an emergency, or urgent situation.

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Emergency Procedures

Please keep clear of and do not damage subsea cables/structures. You risk the loss of your gear and catch, and international communications can be disrupted. These cables carry high voltages and can be dangerous to life. Many cables have high breaking strains, some over 70 tonnes. Cables will usually lie buried in the seabed, although because the seabed can move, there is no guarantee they will remain in the same place.

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Reducing Risks Whilst Fishing

It is essential to be aware of the locations of subsea cables and renewable energy infrastructure, when fishing in the vicinity of such structures. It is essential you have all the information in relation to their positions available to you and the KIS-ORCA project is designed to provide exactly that for all seabed users. Charts, fishing plotter files and an interactive map, showing subsea cables and renewable energy structures surrounding the UK, may be viewed or downloaded, free of charge.

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The Risks of Fishing near Cables & Renewable Energy Structures

The potential risks associated with the offshore renewable and subsea cable industries come in two distinct categories - surface structures and subsurface structures. Each type of structure may potentially be a risk to fishing activities. The information below describes these hazards, with the subsequent sections explaining the emergency procedures.

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Media Gallery

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Tidal Device Principles

Tidal devices exploit kinetic energy in the tidal flow of water caused by the interaction of the gravitational fields of the earth, moon and sun. Tidal currents are magnified by topographical features, such as headlands, inlets and straits, or sea bed channels. Many of the devices that use these currents are broadly similar to submerged wind turbines. Sea water is around 800 times denser than air but average flow speeds for viable projects are of the order of one fifth of corresponding wind speeds, giving a power density of around 5-10 times. This means that for a tidal device of the same rating as a wind turbine, the rotor will be smaller. Individual tidal devices are unlikely to reach the same rated power as offshore wind turbines; however, as to have sufficient space to deploy such large devices requires development of deeper water sites that generally have less significant tidal flows. EMEC has identified four main types of tidal energy convertors that are outline below.

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Wave Device Principles

Waves are created by the interaction of wind with the surface of the sea, sometimes over very long distances.  The size of the waves is influenced by wind, the local seabed bathymetry (which can focus or disperse the energy of the waves) and currents.  Waves offer a large source of energy which can be converted into electricity by a wave energy converter (WEC).  Some wave energy converters have been developed to extract energy from the shoreline, others from waters offshore, some with a hydraulic power take-off system and some with an electrical power take-off system.  EMEC has identified six main types of wave energy converter that are outlined below. 

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Wave & Tidal Devices – Overview

The United Kingdom's wave and tidal stream energy industry is the current global leader, with more installed capacity than the rest of the world combined. Our strength has been built on established British marine engineering skills, the creation of world-first testing facilities and the strength of the energy resource found in UK waters. The UK is proud to have developed the first commercial scale wave and tidal stream projects in 1998 and 2003 respectively but the industry is now on the cusp of commercial viability as we move through the phases of development.

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Wind Farms – Installation Methods

Life cycle stages

Lease award and Pre-construction

Once a developer has obtained a lease from the Crown Estate they will start to appraise the zone or lease area. This requires a number of surveys to be completed including boat or aerial based bird and marine mammals surveys, benthic grabs and fish surveys.

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Wind Farms – Design of Structures Installed

Offshore wind farms consist of a number of connected elements. These include the turbines, foundations, array cables, offshore substation, export cable and onshore substation and infrastructure. These items are installed using a range of different vessels and then serviced by either smaller crew transfer vessels or helicopters.

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Windfarms - Overview

Offshore wind farms consist of a number of wind turbines which sit on foundations, secured to the seafloor, which produce electricity. This electricity is transmitted to where it is needed through a series of cables and substations. The first offshore wind farm was installed in Denmark in 1991 and the industry has grown rapidly since then with 3.3GW installed across Europe (1.8GW of which is in the UK).  China, US, Japan and South Korea have also started to develop offshore wind farms.

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Terms & Conditions

  Terms and Conditions - KIS-ORCA Website This website, www.kis-orca.org, ("the Site") is provided to you ("you" meaning any person, firm, partnership, corporate body or any other legal person accessing or otherwise using, or benefitting from the use of, this Site) by the Kingfisher Division of Seafish, ESCA and its Members. Data which is provided via this Site, including Plotter Data, is provided free of charge. Kingfisher Information Services and ESCA DO NOT verify data provided on the Site, including Plotter Data. Please read these Terms carefully before using this Site: 1 AUTHORITY AND LICENCE FOR USE OF THE SITE 1.1 In making use of the Site, you agree to be bound by these Terms which form the sole agreement between you as user of the Site and us ("Agreement"). 1.2 If you do not agree to be bound by these Terms, you should not use the Site. 1.3 You acknowledge that your use of the Site: 1.3.1 may be limited at any time by us; and 1.3.2 may be suspended or terminated at any time by us. 2 DISCLAIMER 2.1 We give you no warranty or assurance, except as set out in Condition 6 (Our Obligations). We declare and you acknowledge that all implied warranties and conditions are excluded to the maximum extent permitted by law. 2.2 We are not responsible for any: 2.2.1 typographical errors or omissions on the Site; 2.2.2 data, information, text, music, sound, photos or graphics or other material ("Content") that you may have access to as part of, or through your use of the Site, including, but not limited to, other websites that you may access via links provided on our Site; or 2.2.3 Content you may be exposed to through use of the Site that you may find offensive, indecent or objectionable. 2.3 We do not warrant that the Content of this Site is accurate, complete, reliable, current or error-free. 3 LIABILITY 3.1 In respect of use of Plotter Data, we shall have no liability whatsoever to you where the Plotter Data: 3.1.1 as provided to us by any data provider or originator is erroneous, inaccurate or in an incomplete form and such fact is not known to us; 3.1.2 is uploaded to any fishing plotter incorrectly or in an incomplete form; 3.1.3 is not read in conjunction with the Kingfisher Fortnightly Bulletin or any other updates, whether in paper or digital form; 3.1.4 is erroneously interpreted by you or utilised by you in a negligent or reckless manner, or for a purpose for which it was not intended or designed. 4 PROPRIETARY RIGHTS 4.1 You acknowledge and agree that we own all copyright and other rights in and to the content of the Site. 4.2 You agree that you will not remove, obscure or alter any proprietary rights notices (including copyright and trade mark notices) which may be affixed to or contained within the Site. 4.3 You agree that you will not use any data from this site for commercial gain without obtaining permission from KIS-ORCA. 5 YOUR OBLIGATIONS 5.1 You will take reasonable steps to ensure that you comply with these Terms and do not: 5.1.1 engage in any activity that interferes with, or disrupts the operation of, the Site; 5.1.2 access or attempt to access any element of the Site by any means other than through the interface that we provide, unless expressly authorised by us; 5.1.3 reproduce, duplicate, copy, sell, trade or resell the facilities provided on the Site, unless expressly authorised by us; 5.1.4 purport to transfer or otherwise dispose of your rights under these Terms. 5.2 By submitting your personal information to us you agree to our collection, use and disclosure of such information in accordance with our privacy policy set out in Condition 7. 6 OUR OBLIGATIONS 6.1 We will take reasonable steps to ensure that the Site supplied is virus-free. 6.2 We shall use our best endeavours to ensure that access and use of the Site is not interrupted by any event within our control. 7 PRIVACY POLICY 7.1 You acknowledge and agree that: 7.1.1 we collect information about you and your use of this Site, together with any details that you may need to provide for access to, or use of, the Site; 7.1.2 we monitor user traffic patterns and Site use. This may be done through the use of cookies; 7.1.3 we use and disclose information in aggregate (so that no individual users are identified) for strategic development purposes. 7.2 We will never pass personal data to anyone else, except to any successor in title to our business and suppliers that may process data on our behalf in the United Kingdom and abroad. 8 TERMINATION 8.1 This Agreement will terminate if you or we are in material breach of any of its terms and if the breach is not remedied within the period of twenty working days after written notice of it has been given to the party in breach. 8.2 On termination of this Agreement for any reason: 8.2.1 all licences granted hereunder shall immediately terminate; and 8.2.2 termination shall not affect or prejudice the accrued rights of the parties as at termination, or the continuation after termination of any provision expressly stated to survive or implicitly surviving termination. 9 MISCELLANEOUS 9.1 This Agreement is not intended to benefit anyone other than the parties to it and, in particular, no term of this Agreement shall be enforceable under the Contracts (Rights of Third Parties) Act 1999 by a third party. 9.2 If any provision (or part of a provision) of this Agreement is found by any court or administrative body of competent jurisdiction to be invalid, unenforceable or illegal, the other provisions shall remain in force. 9.3 Each of the parties acknowledges and agrees that in entering into this Agreement it does not rely on, and shall have no remedy in respect of, any statement, representation, warranty or understanding (whether negligently made or not) of any person (whether party to this Agreement or not) other than as expressly set out in this Agreement. The only remedy available to it for breach of the Agreement shall be for breach of contract under the terms of this Agreement. End  

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Contact

[contact-form-7 id="807" title="Contact Form"]
Prefer post? The Kingfisher Information Service Seafish Origin Way Europarc Grimsby DN37 9TZ UK
To call or send an email: Tel: +44 (0)131 380 4545 General email: kingfisher@seafish.co.uk Data request email: secretary@escaeu.org

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Sitemap

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Privacy

KIS-ORCA.eu does not store any information that would, on its own, allow us to identify individual users of this service without their permission. Any cookies that may be used by this website are used either solely on a per session basis or to maintain user preferences. When users enter the KIS-ORCA website, their computers will automatically be issued with 'cookies'. Cookies are text files which identify users' computers to servers. The website then creates "session" cookies to store some of the preferences of users moving around the website, e.g. retaining a text-only preference. Cookies in themselves do not identify individual users, but identify only the computer used and they are deleted on departure from the website. Many websites do this to track traffic flows, whenever users visit those websites. The KIS-ORCA website uses third-party cookies to measure use of the website including number of visitors and how frequently pages are viewed. This helps to determine what is popular and can influence future content and development. For this purpose, KIS-ORCA uses Google Analytics to measure and analyse usage of the website. The information collected will include IP Address, pages visited, browser type and operating system. The data will not be used to identify any user personally. Users have the opportunity to set their computers to accept all cookies, to notify them when a cookie is issued, or not to receive cookies at any time. The last of these means that certain personalised services cannot then be provided to that user. This privacy statement only covers the KIS-ORCA website at www.kis-orca.org  This statement does not cover links within this site to other websites.

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Accessibility

The KIS-ORCA partners are committed to producing websites and web resources that can be accessed by all its visitors. We are always keen to hear about ways we can improve the services we provide. If you are having any difficulties using this website, please contact kingfisher@seafish.co.uk Many web browsers have accessibility features, which help you use the web in the way that best suits you. We recommend you select the browser which best suits your needs. You may also need to configure your operating sytem to tailor its accessibility features to your needs.

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The Importance of Renewable Energy Structures

The UK is the world leader in offshore renewables. We have more projects installed, more in construction and more in development than any other country in the world.

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The Future of Subsea Cables

Subsea telecommunication cables have a very long history. Since the installation of the world's first submarine cable across the Dover Strait in 1850, Subsea cables have been essential to the worlds communications infrastructure.

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Submarine Cable Maintenance

Under a Cable Maintenance Agreement and on notification from a Maintenance Authority, a cable repair ship operator will mobilise one of its vessels to conduct a repair on a subsea cable. The maintenance authority will provide an estimated position of the cable fault based on tests carried out from the cable Terminal Stations located either end of the marine cable. Permitting, Charting, and existing cable information is assessed prior to the vessel departing.

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Maintenance / Repair Operations

Submarine cables are very reliable, however, there are occasions when a repair to a cable becomes necessary.

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Cable Burial

At the planning and installation phase of a submarine cable project one of the most effective methods of protecting a submarine cable from damage caused by external aggression is to bury the cable, usually with a sea plough.

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Installation Procedures and Methods

Selection of provisional route

Once the requirement for a cable system has been identified and funds raised to build it, the first thing which happens is that a cable manufacturer and installer is contracted by the cable system parties.

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Design

Modern Fibre optic cables can carry many millions of telephone calls, together with huge amounts of video and internet data.  Approximately 95% of the world's telecommunication requirements are met by submarine cables. Cables are used because of their high reliability, capacity and security. Cables have an insignificant delay compared to satellite and are most cost-effective on major routes, hence communications costs are cheaper than satellites.

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About

The KIS-ORCA Project The Kingfisher Information Service - Offshore Renewable & Cable Awareness project (KIS-ORCA) is a joint initiative between the European Subsea Cables Association (ESCA) and the Kingfisher Information Service of Seafish. ESCA membership represents much of the subsea telecommunications and offshore renewable energy industry and they work with industry bodies like Renewable UK who recognise the benefit and value of the KIS-ORCA project. The aim of the KIS-ORCA project is to provide fishermen with accurate, up to date and free information relating to subsea cables and offshore renewable energy structures across Europe. KIS-ORCA information is available to fishermen in the following formats: Fishing Plotter Files Supplied on USB stick, all the KIS-ORCA data is available to fishermen in the most popular fishing plotter system formats and is updated annually. These files are also available to download from here. Awareness Charts Awareness charts are produced for key KIS-ORCA data areas. There are six charts surrounding the UK and localised charts for each constructed wind farm. These are available to download from here. www.KIS-ORCA.org This interactive website allows fishermen to view subsea cable and renewable energy structures on an interactive map, download the latest data and ensure they are up-to-date with the very latest offshore activity news. The website has been produced primarily for Fishing Safety, although also gives fishermen an insight into the offshore industries they share the seabed with.

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Downloads

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News

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Safety

Offshore windfarms and subsea cables are increasing in number around the shores of the UK and the potential risks to fishermen, associated with these structures, need to be recognised and managed in a responsible way.

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Renewable Energy

This section contains information relating to Renewable Energy Structures, from design to installation, maintenance to future trends.

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Subsea Cables

This section contains information relating to Subsea Telecoms and Power Cables, from design to installation, maintenance to future trends.

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Homepage

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Map

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Downloads

ALL PLOTTERS (Fishing Plotter File) download

ALL PLOTTERS (Fishing Plotter File)

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TimeZero (Fishing Plotter File) download

TimeZero (Fishing Plotter File)

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Litton FishMaster (Fishing Plotter File) download

Litton FishMaster (Fishing Plotter File)

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Maxsea (Fishing Plotter File) download

Maxsea (Fishing Plotter File)

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Olex (Fishing Plotter File) download

Olex (Fishing Plotter File)

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Penta (Fishing Plotter File) download

Penta (Fishing Plotter File)

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SIS MicroPlot (Fishing Plotter File) download

SIS MicroPlot (Fishing Plotter File)

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Sodena (Fishing Plotter File) download

Sodena (Fishing Plotter File)

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TM Planner / Quodfish (Fishing Plotter File) download

TM Planner / Quodfish (Fishing Plotter File)

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TRAX (Fishing Plotter File) download

TRAX (Fishing Plotter File)

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Transas Navifisher (Fishing Plotter File) download

Transas Navifisher (Fishing Plotter File)

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Kingfisher Regional - North Sea North and West download

Kingfisher Regional - North Sea North and West

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Kingfisher Regional - North Sea Central download

Kingfisher Regional - North Sea Central

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Kingfisher Regional - North Sea South download

Kingfisher Regional - North Sea South

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Kingfisher Regional - English Channel download

Kingfisher Regional - English Channel

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Kingfisher Regional - South West Approaches download

Kingfisher Regional - South West Approaches

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Kingfisher Regional - Irish Sea download

Kingfisher Regional - Irish Sea

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Kingfisher Regional - Baltic North download

Kingfisher Regional - Baltic North

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Kingfisher Regional - Baltic South download

Kingfisher Regional - Baltic South

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Beatrice download

Beatrice

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Hornsea 2 download

Hornsea 2

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Borselle 1+2 download

Borselle 1+2

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Moray East download

Moray East

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Hywind download

Hywind

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Kincardine download

Kincardine

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Blyth Demonstrator Project download

Blyth Demonstrator Project

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Teesside download

Teesside

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Hornsea Project One download

Hornsea Project One

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Westermost Rough download

Westermost Rough

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Humber Gateway download

Humber Gateway

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Triton Knoll download

Triton Knoll

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Race Bank download

Race Bank

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Sheringham Shoal download

Sheringham Shoal

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Dudgeon download

Dudgeon

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Lincs download

Lincs

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Inner Dowsing & Lynn download

Inner Dowsing & Lynn

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Scroby Sands download

Scroby Sands

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Galloper download

Galloper

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Greater Gabbard download

Greater Gabbard

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Gunfleet Sands & Demonstrator Site download

Gunfleet Sands & Demonstrator Site

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London Array download

London Array

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Kentish Flats & Extension download

Kentish Flats & Extension

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Thanet download

Thanet

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Rampion download

Rampion

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Rhyl Flats download

Rhyl Flats

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Gwynt Y Mor download

Gwynt Y Mor

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North Hoyle download

North Hoyle

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Burbo Bank & Extension download

Burbo Bank & Extension

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Barrow download

Barrow

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West of Duddon Sands download

West of Duddon Sands

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Walney 1-3 download

Walney 1-3

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Ormonde download

Ormonde

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Robin Rigg download

Robin Rigg

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Nysted download

Nysted

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Horns Rev 3 download

Horns Rev 3

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Horns Rev 2 download

Horns Rev 2

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Horns Rev 1 download

Horns Rev 1

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Gode Wind 2 download

Gode Wind 2

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Gode Wind 1 download

Gode Wind 1

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Borkum Riffgrund download

Borkum Riffgrund

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Anholt download

Anholt

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Danish Kreigers Flak download

Danish Kreigers Flak

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East Anglia One download

East Anglia One

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Neart Na Gaoithe download

Neart Na Gaoithe

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Seagreen Alpha download

Seagreen Alpha

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Wave Hub download

Wave Hub

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Aberdeen Demonstration Project download

Aberdeen Demonstration Project

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Fishing Plotter Installation Guide download

Fishing Plotter Installation Guide

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News

Verification Operations - UKCS Blocks 29/03c and 29/04c

As part of the Shell U.K. site and pipeline route seabed survey there is a requirement to undertake a verification operation within UKCS Blocks 29/03c and 29/04c. The anticipated duration of the verification operation is one day. For further details on the main survey refer to Notice "Site and Pipeline Route Environmental Seabed Survey - Central North Sea".

Data will be acquired over the survey area using a multi-beam echosounder (MBES) and side scan sonar (SSS) equipment. The survey equipment will be operated within the survey area. The survey vessel will make line turns outside of the main survey area but within the greater working area (GWA). The co-ordinates provided are for the GWA. 

 

 

The Survey will be undertaken by the Fugro Searcher, Call sign C6EI5 and IMO Registration number 9504011.

See detailed map on our bulletin website
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Uncrewed Surface Vessels (USV) Survey Operations - SW of Isles of Scilly

Operation of remotely piloted Uncrewed Surface Vessels (USVs) are planned 30 & 60nm southwest of the Isles of Scilly during April 2023 – May 2024. The vessels will be engaged in survey activities 30 & 60nm southwest of the Isles of Scilly as outlined in Figure 1. It is expected there will be up to 5 USVs operational at any one time.

Activity:

Operation of remotely piloted Uncrewed Surface Vessels (USVs) are planned 30 & 60nm southwest of the Isles of Scilly during April 2023 – May 2024. The vessels will be engaged in survey activities 30 & 60nm southwest of the Isles of Scilly. It is expected there will be up to 5 USVs operational at any one time.

 

Dates:

Survey operations are expected to start subject to weather and other operational factors from 16th April 2024 for approximately 6 weeks.

 

Location:

Survey area coordinates are provided in this notice. In addition to the survey area, the USVs will transit from/to St Mary’s Harbour – Isle of Scilly.

 

Notes: Although the USV are uncrewed, they is managed throughout the 24 hour operation, piloted remotely using 360 degree cameras and other navigational aids. The USV sends real time images and situational awareness data over satellite to a team of operators keeping watch and controlling the vessel remotely 24/7. A support vessel will escort the USV from the active ports to clear water. Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this period. 

See detailed map on our bulletin website
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Wave Buoy Installation - Penguins

Penguins Wave Buoy, installed in October 2021 broke free of its moorings in December 2023 and has since been recovered. The Wave Buoy will now be re-instated in its original design location and will remain within the Penguins Field. The Buoy has a 290m drift radius and its moorings components are detailed in attached drawing (Wave Buoy Configuration)

Vessel Name: BB Octopus.

 

Penguins Wave Buoy will be re-installed at its previous (design) location (see drawing EP201907206628003)

See detailed map on our bulletin website
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Dive Support Vessel (DSV) Campaign – WOSPS/Clair

Dive Support Vessel (DSV) Deep Explorer (Call Sign C6BZ7) will be carrying out diving operations at the WOSPS Clair connection point. Dates 22 April 2024 – Duration expected approx. 1 week. Other vessels are requested to keep safe distance.

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Marine Operations - Rosebank Offshore Development Area

Dive Support Vessel (DSV) Deep Explorer (Call Sign C6BZ7) will be carrying out marine operations at the Rosebank field (Offshore Development Area). Starting 30 April 2024 – duration expected approx. 3 weeks. Other vessels are requested to keep safe distance.

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Calibration Test - Thistle Wind Partners proposed Bowdun (E3) Offshore Wind Farm

Please be advised Thistle Wind Partners (TWP), will be undertaking a Geophysical survey of the proposed Bowdun (E3) Offshore Wind Farm export cable corridor in the comings weeks. Prior to the survey being undertaken the survey vessel will be required to undertake calibration tests of its survey equipment. The purpose of this notice is to outline the working area required for the survey vessel to undertake the calibration. The pre-survey calibration test will utilise the MV Ondine Jule.

Ondine will be conducting pre survey calibration tests. During the tests the Ondine Jule will be deposit calibration equipment on the seabed prior to carrying out test survey lines over the top of the in-site calibration equipment, operating at approximately 4 knots with equipment being towed at a distance of up to 300 m astern of the vessel. The vessels calibration will take up to 48hrs to complete, however, additional time has been acknowledged to accommodate weather and operational delays.

 

The vessel will be restricted in their ability to maneuver and will display the appropriate lights and shapes. Other vessels are requested to provide a minimum clearance of 500m from the survey vessel during marine operations, and pass at a safe speed. The survey vessels will monitor VHF Channel 16 at all times.

See detailed map on our bulletin website
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Decommissioning - Leman 27J

Decommissioning activity will be carried out at the Leman 27J platform between June and September 2024. The ERDA Jackup Barge will be interfaced with the platform for the duration of the project. The decommissioning will involve the plug and abandonment of all wells, making the topside hydrocarbon safe (HSC), and the removal of the topside and it transport to shore for recycling. The ERDA Jackup Barge will be interfaced with the installation for the duration of the project.

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Subsea Field Decommissioning - Arthur Field

The Arthur field's three standalone wells will be decommissioned between April and July 2024. The HAEVA Jackup Barge will be on location for the duration of the project, along with one Diving Support Vessel (DSV).

Arthur consists of three standalone wells (A1, A2 and A3) and a manifold. The wells are up to 3km apart, and the manifold is located close to the A1 well. 

 

The HAEVA will move from one well to the next as it completes the plug and abandonment of the well.  The DSV will be utilised to support the pipeline flushing and will move between wells as per operational requirements.

 

The current planned sequence HAEVA rig move and positioning is as follows:

A2 - 17 April 2024

A3 - 25 May 2024

A1 - 14 June 2024

END - 1 August 2024

 

See detailed map on our bulletin website
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Valaris 123

This oil and gas drilling rig has moved to this new position. Rigs are protected by a 500 m safety zone and some may have anchors extending beyond this zone.

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Environmental Sampling - Gannet E Field

Petrofac will undertake environmental sampling in the Gannet E field using the Ocean Observer Petrofac, lasting approximately two days.

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Site and Pipeline Route Survey - Belinda

Pipeline, umbilical route and rig site survey of Belinda location, including 2DHR, ahead of drilling operations. Petrofac will be undertaking a survey using the Gardline Ocean Observer vessel. The survey window begins from 1 March 2024 and lasting approximately 17 days.

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Geophysical Survey - Evelyn

Petrofac to undertake a geophysical survey in the Evelyn field using the Ocean Observer, lasting approximately 2 days.

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Geotechnical Survey - Berwick Bank Wind Farm

Mariners are advised that SSE Renewables will be returning to Berwick Bank Wind Farm area to undertake further Geotechnical survey work. The survey will be within the proposed Berwick Bank Wind Farm site boundary. It should be noted that SSE Renewables are not expecting fishermen to relocate gear - on this occasion the vessel(s) will work around any gear on location. A guard vessel will also be contracted to work alongside each survey vessel. 

Update - the Fugro Scout has now demobilised from the survey area. The Fugro Quest continues to operate within the site until approximately the 23 April 2024 weather conditions permitting. 

 

The survey work is being undertaken by Fugro and will be conducted from two vessels: the Scout and the Quest. The geotechnical survey is due to start on 27 October 2023. The scouting/guard vessel will be the Morning Dawn. 

 

Survey Duration  

The survey will mobilise 27 October 2023 lasting approximately 5 months. To account for all eventualities, we would like to extend the duration to 30 April 2024.  

 

Survey Tasks  

The survey will involve borehole sampling, using the Geobor-S coring system or similar, with the number and location of the boreholes yet to be finalised. 

 

As a consequence of equipment being deployed and the modes of operation, all mariners are advised to keep a safe clearance distance of no less than 500metres from the vessel(s). No towed equipment will be used.  

See detailed map on our bulletin website
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Offshore Geophysical Survey - Eastern Green Link 4

Mariners are advised that a marine geophysical survey is planned for the Eastern Green Link 4 (EGL4) project. The marine survey activities for EGL 4 are planned to commence mid-February 2024 and are expected to complete by 16th April 2024

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Route Clearance & Pre-Lay Grapnel Run - 2 Africa Cable Project - Bude

Vessel 'Cable Vigilance' will carry out Route Clearance & Pre-Lay Grapnel Run ahead of the next phase of 2Africa Project. Vessel speed for RC / PLGR is approx. 17km / day. Vessel will be towing grapnel therefore will have limited manoeuvrability.

Vessel - Cable Vigilance IMO - 9329930  

Operations: Route Clearance Operations will be conducted to the laying and buria operations. This operation is to ensure that as far as practically possible, the burial operation will not be interrupted.  RC will be performed at specific locations, in areas with planned burial where old Out-of- Service (OOS) cables are known to cross the cable route. The vessel will remove a suitable section of this old cable to ensure safe ploughing. The cable ends of any cut out-of-service cables will be laid onto the seabed and weighted, in accordance with ICPC recommendations. PLGR is required in planned burial areas prior to cable installation (approx 221km). The PLGR operation will be to industry standards employing towed grapnels; the type of grapnel being determined by the nature of the seabed. This process will remove all debris on the seabed surface (e.g. old fishing net, rope/wire, anchor chain) that may obstruct the ploughing process. Sea bed debris can damage cable and burial equipment. The PLGR vessel will operate as close to shore as possible. Divers will remove debris near shore or adjust the cable route if debris cannot be removed. Any debris recovered during these operations will be discharged ashore on completion of the operations and disposed of in accordance with local regulations. RC and/or PLGR operations can be performed by the cable ship or by a vessel of opportunity specifically fitted with winches and grapnels. The vessel will be equipped with navigation and positioning system to the same specification as the main lay vessel.

See detailed map on our bulletin website
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Equipment trials - UKCS Block 13/20

The Fugro Venturer will test 3DUHR and Autonomous Underwater Vehicle (AUV) equipment in UKCS Block 13/20. Testing will comprises data acquisition along several parallel 500m lines spaced 15 m apart within a 4 km x 4 km area. The equipment being tested will comprise; Autonomous Underwater Vehicle (AUV) and sparker seismic source with 4 parallel Streamers up to 90m behind vessel. Testing will take place for up to 10 days between 27th March and 17th April 2024

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Apache Forties Charlie Riser Replacement (DSV Boka Polaris)

Apache North Sea intends using the Dive Support Vessel (DSV) Boka Polaris to install a new riser off the East face of the Forties Charlie Platform. The vessel will be working within Forties Charlie platform 500m zone for about 21 to 25 days.

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Rig Move - COSL Pioneer Semi-Submersible MODU

COSL Pioneer - a semi-submersible Mobile Offshore Drilling Unit (MODU) is planned to move from Ithaca Captain Field (Block 13/22a) to Ettrick field (Blocks 20/2a and 20/3a) to perform an abandonment campaign of five wells. The planned Rig move date is on 14th April 2024.

Anchor pre-lay is due to commence Thursday 4th April at the earliest, with the COSL Pioneer due to move to location 1-2 weeks later (current estimate 14th April).

 

The nature of activity involves rig positioning/anchor handling for a well abandonment campaign lasting approximately 183 days for the entire operation. 

 

Precautions taken to reduce impact on shipping and other sea users:

  • Advance notice to other sea users/marine authorities/fishing information services will be provided.
  • A dedicated ERRV will be in attendance, fitted with ARPA Radars and AIS systems and shall perform monitoring of all traffic via a 24-hour lookout on the bridge. The ERRV shall keep records of all logged vessels in the area.
  • The COSL Pioneer will use its navigation lights and warning devices, such as obstruction lights and foghorn, to advise shipping of its presence while on location.
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Deep Arctic DSV - Power Cable Installation - Captain Field

The Deep Arctic will be infield installing a power cable from Captain BLPA to Area B UTM structure. Divers will be used to tie-in the power cable to structures at the riser base (BLPA) and UTM structure (Area B).

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DSV Campaign - Penguins

This DSV campaign aims to complete work previously consented under approved consented applications in October which includes some light construction works at DC5 and DC7. Some inspection and brownfield integrity checks will also be performed throughout the field prior to FPSO arrival later next year.

Provisional Mob date & duration:  19th Feb 2024 (Duration 6 weeks)

 

VESSEL: Seven Kestrel

 

The respective scopes include the DSV accessing the following Penguins locations:-

 

RBM, DC2, DC3, DC4, DC5, DC6, DC7, DC8 & DC9

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Wellhead Protection Structure - Rita 44/22c-12Z

The Canopy has been removed from top of Wellhead Protection Structure (WHPS) on the Rita 44/22c-12Z subsea well. The WHPS is located within an existing 500m zone.

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Replacement Control Jumper - Penguins E1 Wellhead

This work scope is to replace the Control Jumper "PL1903JE1" which was previously consented but was not completed. The control jumper will be disconnected at either side and remain on the seabed adjacent to the Penguins DC5 control structure and Well E1. A new replacement control jumper (PLU6350) will be installed from the Penguins DC5 control structure to Well E1. Vessel : Seven Kestrel

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Unknown obstruction and lost fishing gear

Two fishing vessels that were pair-trawling have come fast on a subsea obstruction at this position. After a significant period trying to recover their gear, they broke free of the obstruction, losing a section of their net and gear. The position is 190 metres East of an umbilical pipeline.

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Demarcation / Met-Ocean Buoys - Sofia Offshore Wind Farm

The Kingdom of Fife commenced and continues with Met-Ocean & Demarcation maintenance works within the Sofia Export Cable Route and also within the Array. Works will last for approx. 14 days (weather permitting). Note: Vessel is currently off location. The Voe Earl is expected on site for the service works on demarcation buoys marking the perimiter of the the Sofia Offshore array, including the reinstatement of the East Cardinal Buoy "E4".

The Met-ocean buoys at KP2 has already been removed and those metocean buoys at KP8 and KP40 on the Export Cable Route will also be permanently recovered during March 2024. There will also be an additional three Met-ocean buoys installed within the Sofia Offshore Windfarm Array as well as an additional met-ocean buoy at KP180 along the export cable route.

 

Vessels will be working daylight hours only and shall be monitoring VHF 16 during the scope of the works and shall also be exhibiting the correct day shapes and night lights for a vessel restricted in ability to manoeuvre.

 

Mariners are requested to refrain from entering and transiting through the construction area as demarcated by these demarcation buoys.

 

The table below provides a summary of each Cardinal and Special Mark Buoy deployed at the SOWF array, including target coordinates in WGS84 Degrees Decimal Minutes and a description of top mark and lantern characteristics. The Demarcation Buoys will be deployed for a period of approximately three years.  

Buoy ID Latitude Longitude Lantern Characteristics Lantern  Colour
North Cardinal N1 55° 08.133’ N 002° 09.518' E

VQ 0.5s

White
North Cardinal N2 55° 08.436’ N 002° 13.418’ E

Q 1s

White
East Cardinal E1 55° 06.480’ N 002° 16.929’ E  

Q(3) 10s

White
East Cardinal E2 55° 02.571’ N 002° 23.925' E

VQ(3) 5s

White
East Cardinal E3 54° 59.043’ N 002° 30.269’ E

Q(3) 10s

White
East Cardinal E4 54° 55.085’ N 002° 26.631’ E

VQ(3) 5s

White
East Cardinal E5 54° 51.523’ N 002° 20.709' E

Q(3) 10s

White
South Cardinal S1 54° 49.725’ N 002° 16.726' E

Q(6) + LFL 15s

White
West Cardinal W1 54° 51.829’ N 002° 12.194' E

Q(9) 15s

White
West Cardinal W2 54° 56.229’ N 002° 03.867' E

VQ(9) 10s

White
West Cardinal W3 55° 00.623’ N 001° 56.196' E

Q(9) 15s

White
West Cardinal W4 55° 04.648’ N 002° 02.498' E

VQ(9) 10s

White
Special Mark SP1 55° 02.741’ N 001° 59.756' E

FI Y 5s

Yellow
Special Mark SP2 55° 06.569’ N 002° 05.756' E

FI Y 5s

Yellow
Special Mark SP3 55° 04.525’ N 002° 20.428' E

FI Y 5s

Yellow
Special Mark SP4 55° 00.617’ N 002° 27.418' E

FI Y 5s

Yellow
Special Mark SP5 54° 56.871’ N 002° 29.602' E

FI Y 5s

Yellow
Special Mark SP6 54° 53.324’ N 002° 23.621' E

FI Y 5s

Yellow
Special Mark SP7 54° 54.030’ N 002° 08.026' E

FI Y 5s

Yellow
Special Mark SP8 54° 58.427’ N 001° 59.703' E

FI Y 5s

Yellow

 

The table below provides a summary of the Met-ocean Buoys deployed at the SOWF Array.

 

Site Location Buoy Position Latitude Longitude Deployment Date Recovery Date
Export Cable KP2 (From Shore) 54 36.508N 001 00.175W June 2023 Now recovered
Export Cable KP8 54 36.584N 000 54.674W June 2023 Will be recovered permanently
Export Cable KP40 54 40.524N 000 26.735W June 2023 Will be recovered permanently
Export Cable KP130 54 50.543N 000 54.689E June 2023 Will remain in position until further notice
Export Cable KP180 TBC TBC March 2024 Will remain in position until further notice
SOWF Array North 55° 5.392' N 002° 12.993' E June 2023 Will remain in position until further notice
SOWF Array South 54° 54.987' N 002° 15.585' E June 2023 Will remain in position until further notice
SOWF Array East 54° 58.160' N 002° 22.521' E March 2024 Will remain in position until further notice
SOWF Array West 55° 01.528' N 002° 04.052' E March 2024 Will remain in position until further notice
SOWF OCP 55° 00.439' N 002° 14.798' E March 2024 Will remain in position until further notice

 

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Array Boulder Clearance and Pre-trenching Works - Sofia Offshore Wind Farm

All Mariners are advised that that the ASSO Subsea vessel “TSV Aethra” continues with boulder clearance and pre-trenching works within the Sofia Offshore Wind Farm Array. The TSV Aethra departed site for dry dock on the 18th March 2024 and is expected to return to site withing the next 14 days to recommence operations.

The works are scheduled to be deployed during four visits to site (from Port of Blyth). Vessels are requested to leave a wide berth during the installation operations of at least 0.5 Nm.

 

The length of the boulder clearance and pre-trenching activities will vary depending on the execution progress, and details of any changes will be confirmed in further Notice to Mariners to be issued during the course of the project.

 

The table above provides the coordinates of the total working area of the boulder clearance and pre-trenching works at the SOWF array. 

 

The TSV Aethra shall be monitoring VHF 77 during the scope of the works and shall also be exhibiting the correct day shapes and night lights for a vessel restricted in ability to manoeuvre.

 

**Note: In the exclusion zone, temporary reduction by approx. 1 meter in navigable depth might be created from the pre-plough spoil heaps.

 

Vessel Name Vessel Type Length Beam Draft Gross Tonnage Call Sign MMSI Number
TSV Aethra Boulder Clearance and Pre-Trenching Vessel 94.10m 22m 7.1m 7,082 SVDM6 241831000
Enterprise II Guard / Scout Vessel 26.00m 9.2m 4.7m 421 MPFN7 232006130

 

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Post-Lay Cable Burial Works - Sofia Offshore Wind Farm

All Mariners are advised that the Normand Pacific continues with post-lay cable burial works on the Sofia Export Cable. The exact finish dates will be dependent on the prevailing weather conditions and work progress. The Normand Pacific has now departed the project and is expected to return in Mid-June 2024 to recommence operations.

The post-lay burial (PLB) vessel “Normand Pacific” will be present for the entire scope of works. The Normand Pacific will transit from Middlesborough Support Depot and remain on site for 24hr operations. The PLB vessel will make passage to and from the support depot as required based on operational constraints.

 

The PLB will be supported by those guard vessels outlined in the table above.  Guard vessels will remain be onsite 24 hours per day to monitor the export cable until approximately the end of Q2 - 2024.

 

Exclusion zone coordinates for the 2023 to 2024vpost-lay burial works are identified within the table above and remain the same for those during cable lay works as outlined in NtM 11 (rev 02).

 

The coordinates of the guard vessel locations for the post-lay burial works for Campaign 1 are detailed within the table above and attached NtM.

 

Please be aware that by virtue of mode of operation and the equipment deployed, the Normand Pacific will at times be Restricted in their Ability to Manoeuvre as defined under COLREGS (International Regulations for Preventing Collisions at Sea 1972 and shall be exhibiting the correct day shapes / lights for vessels restricted in ability to manoeuvre.

 

Mariners are requested to remain where possible 500m from vessels and equipment. Fishing vessels are requested to pass at a safe speed and distance and remain outside of the exclusion area identified. All vessels can be contacted on VHF 16 for further information as required reference proximity/nearby operations etc.

 

Mariners are advised of the following vessels operating at the Sofia Offshore Wind Farm (SOWF).

 

Vessel Name Vessel Type Length (m) Beam (m) Draft (m) Gross Tonnage (T) Call Sign MMSI Number
Normand Pacific Post-Lay Cable Burial Vessel 122 23 7.0 9778T LAXI7 257743000
Sancta Maria Guard Vessel 20.37 6 3.03 106 2FOV7 235093015
Inge Guard Vessel 29.7 6.2 3.1 192 YJSN5 577097000
Jason II Guard Vessel 26.02 6.01 3.21 127 MJFY4 232036020
Dolfijn Guard Vessel 27 6.2 3.1 99 YJQL8 576697000
Mary Ann Guard Vessel 32.7 7 3.6 53 YJTV2 577256000
Venus II Guard Vessel 24 7.4 3.15 145 HP9337 370046000
Walvis Guard Vessel 27 6.4 3.32 108 YJQG3 576448000
Flamingo Guard Vessel 31 7 3.5 159 YJVW2 576259000
Haulbowline Guard Vessel 22.3 7 2.7 88 MEZW9 232021354
Star of Hope Guard Vessel 23.9 7.2 3.4 101 MKDN2 232038483
Karima Guard Vessel 26.10 6.0 4.0 88 MPKV5 232006310
Enterprise II Guard / Scout Vessel 26 9.2 4.7 421 MPFN7 232006130
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Broadshore Wind Farm - Metocean buoy Investigation

Eolos has deployed two floating LiDAR Devices offshore Scotland for the acquisition of Wind and Metocean Data for a minimum period of 24 months.

Eolos has deployed two (2) Floating LiDAR Devices offshore Scotland for the acquisition of Wind and Metocean Data for a minimum period of 24 months.

 

The units deployed are:

  • FLS200 E25 (deployed 09 Apr 2023); and
  • FLS200 E26 (deployed 08 Apr 2023)

 

Metocean buoy

Illustrative figures showing the buoy dimensions and general arrangement are provided in the attached NtM. 

 

Once in the water the top of the tallest mast is around 4 meters above the sea level.

 

The buoy is fitted with the following navigational safety features:

  • Buoy painted yellow in colour;
  • Yellow St Andrews Cross;
  • Radar reflector;
  • AIS AtoN (with MMSI 992351405, corresponding to Broadshore FLIDAR E26); and
  • Marine lantern (with flash character Fl (5) Y 20s - 5 yellow flashes every 20 seconds) with a range of 5 nautical miles.

 

Mooring design

 

The buoy drifting radius is approximately 240 m from its deployment position. All material will be removed from the seabed after the measurement campaign is complete. The mooring layout design is provided on the final page of this document. The mooring layout design is provided as the final page of the attached NtM.

 

 

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Moray West Wind Farm - Array cable burial

Scope of work includes the jet trenching of array cables between the Wind Turbine Generator foundations and Offshore Substation foundations. Also an ROV survey of the array cable routes post burial will conducted.

Please be aware that, during the cable burial work and activities, by virtue of its mode of operation the North Sea Enabler will be Restricted in her Ability to Manoeuvre (RAM) and will also display the appropriate day shapes while conducting cable installaiton operations are taking place as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972, Rule 3).

 

Masters of approaching vessels are therefore requested to maintain their vessels and gears at a minimum safe passing distance from the vessel of 500 metres when it is undertaking work and

showing the appropriate shapes and lights in accordance with COLREGs Rule 27 to not compromise the safety of the ‘North Sea Enabler and their crew, and the ability to undertake its contracted

works.

 

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Installation of Eco moorings - Studland Bay

The dive vessels Skindeep or Skindeeper will install 57 'eco moorings' using divers in Studland Bay. Works will only be undertaken during daylight hours. Works are wholly weather dependent and this phase is anticipated to be completed within 6 weeks. All vessels are requested to keep a safe distance and obey all signal flags.

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Geophysical Survey - Berwick Bank Wind Farm

Following weather delays, mariners are advise that SSE Renewables would like to extend the validity of this geophysical survey notice to 25 April 2024, taking place within the Berwick Bank Wind Farm turbine array area. A guard vessel will continue to operate ahead of the survey vessel, from 08 April 2024 onwards, this will be the Courage (SH170).

The survey will focus upon the north west quarter of the site with possible survey in the southern half of the site pending weather and survey progress. SSE Renewables are engaging with static gear fishers operating within the north western quarter of the site to arrange relocation of gear. A guard vessel with an onboard fisheries liaison officer (OFLO) will be present to work alongside the survey vessel. The survey work is being undertaken by Green Rebel and will be conducted by the Roman Rebel vessel. Pending weather conditions vessels are due to be on site from 28 February 2024. The scouting/guard vessel will be the GV Courage SH170 (up to 14th March) and the Shemarah II LH65 (from 13th March onwards).

 

The survey was anticipated to take approximately 2 weeks however following weather delays and we now would like to extend the duration of this notice validity to 25th April 2024.

 

Please note that towed equipment will be used. The survey will involve towing and deployment of: • Multi Beam Echosounder – to 3D map seafloor and calculate water depths; • Ultra-High Resolution Seismic (UHRS) – to provide data on conditions beneath the seabed; • Side Scan Sonar – to detect seabed objects; • Sub-bottom profiler – to provide data on conditions beneath the seabed; • Magnetometer – to detect any ferrous metal objects (wrecks / unexploded ordnance); • Ultra Short Baseline – to assist in positioning of the subsea equipment being towed / submerged.

 

As a consequence of equipment being deployed and the modes of operation, all mariners are advised to keep a safe clearance distance of no less than 500 m from the vessel(s). There will be an Offshore Fisheries Liaison Officer on board the guard vessel as well as an Onshore Fisheries Liaison Officer to account for 24 hour survey operations

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Nearshore Water Sampling - Stromar Offshore Wind Farm

The survey vessel Seren Las will attend to a number of sampling stations within the survey area presented. At each station water quality sampling will be undertaken.

Mariners are advised Stromar Offshore Wind Farm are undertaking nearshore water sampling from Friday 12 April 2024 in the Moray Firth near Fraserburgh, Scotland for one to two days. The survey vessel Seren Las will attend to a number of sampling stations within the survey box.

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Floating LiDAR Buoys - Campion Wind

CampionWind Offshore Wind Farm Floating LIDAR (FLiDAR) Campaign will be extending a campaign to service FLiDAR Buoy SWLB060 between the 17th February and 30th April 2024. Following servicing the FLiDAR Buoy SWLB060 will remain mobilised until the 30th September 2024.

Mariners are advised that CampionWind Limited (a 50/50 Joint Venture company between ScottishPower Renewables UK Limited and Shell New Energies Holding Limited) will be carrying out servicing activities on FLiDAR Buoy SWLB060 between the 17th February and the 30th April 2024 (depending on weather conditions).

Following servicing the FLiDAR Buoy SWLB060 will remain mobilised until the 30th September 2024.

Servicing activities will comprise of the following steps: − Temporary retrieval of the FLiDAR Buoy SWLB060 for transport to Aberdeen for servicing; − Collection of FLiDAR Buoy SWLB060 in Aberdeen for onsite redeployment.

 

The FLiDAR Buoy will be monitored remotely so that in the event of a mooring failure, a team can be mobilised to carry out recovery and re-deployment activities. The Seawatch FLiDAR Buoy is yellow in colour and will exhibit a navigation light according to IALA standards: five (5) flashes at one (1) Hertz, every twenty (20) seconds (Fl (5) Y 20s). The ranges for the light on the Buoy is 5 nautical miles.

 

The FLiDAR Buoys location is outlined below and displayed within the Notice to Mariners (provided as an attachment to this notice). This location is within the CampionWind offshore wind farm array area, off the east coast of Scotland.

 

CampionWind will not seek to submit an updated AIS licence to support this extended mobilisation as the existing AIS Licence (1280449/3) is valid until September 2027.

 

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Metocean and Floating LiDAR Campaign extension - MarramWind Offshore Wind Farm

MarramWind Offshore Wind Farm Floating LiDAR (FLiDAR) Campaign will be extending a campaign to service FLiDAR Buoy WS198 between the 17th February and the 30th April. FLiDAR Buoy WS198 will remain mobilised until 30th September 2024. The Seawatch Midi Metocean buoy and FLiDAR Buoy SWLB56 were successfully demobilised on the 26th February 2024.

Mariners are advised that MarramWind Limited (a 50/50 Joint Venture company between ScottishPower Renewables UK Limited and Shell New Energies Holding Limited) will be conducting a service visit for the FLiDAR Buoy WS198 commencing from 17th February to the 30th April 2024 (depending on weather conditions).

 

Following servicing the FLiDAR Buoy WS198 will remain mobilised until the 30th September 2024.

 

Servicing activities will comprise of the following steps:

− Temporary retrieval of the FLiDAR Buoys WS198 for transport to Aberdeen for servicing;

− Collection of FLiDAR Buoy WS198 in Aberdeen for onsite redeployment.

 

All locations referred to are outlined in a table and displayed in Figure 1 within the Notice to Mariners (provided as an attachment to this notice). These locations are all within the MarramWind offshore wind farm 75 km off the east coast of Scotland.

 

FLiDAR Buoy WS198 is yellow in colour and will exhibit a navigation light according to IALA standards: five (5) flashes at one (1) Hertz, every twenty (20) seconds (Fl (5) Y 20s). The ranges for the lights on the buoy is 5 nautical miles.

 

Further details can be found within the attached Notice to Mariners.

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Offshore Construction - Dogger Bank B Offshore Wind Farm

Offshore Construction of the Dogger Bank B Offshore Wind Farm commenced on the 21st of April 2023 with the installation of the OSP jacket foundation. This notice will be updated weekly, giving information on the progress and resources involved in the offshore project. The intention is to give an overview of activities and vessels involved. Should anyone have questions regarding the operations, we kindly ask you to put them forward well in advance.

In the Second of two phases, the offshore installation vessel, HLV Saipem 7000, will install the DBB Offshore Substation Platform (OSP) Topside within the Dogger Bank B construction area. 

 

The works will commence on approximately the 08th of April 2024, continuing until approximately the 18th of April 2024. The works will be continuous 24 hours a day.

 

During operations, the HLV Saipem 7000 will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. 

 

There will also be 1no. tow tug Pacific Discovery towing 1No. unmanned cargo barge Castoro XI carrying the OSP Topsides to be installed and an additional anchor handling tugs, Fram Prince and Atlantic Kestrel. See Table below for details. Tow tug and AHTs will also transmit AIS messages. 

 

During operations, a Statutory Safety zone of 500m radius will be in place around the HLV Saipem 7000 during the installation of the DBB OSP Topside. The HLV Saipem 7000 will deploy anchors (12No.) in an area with approximately up to 2km radius from OSP installation location. Vessels are requested to maintain a minimum safe passing distance of 2km from the Saipem 7000 during the operation

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Foundation Installation Campaign - Dogger Bank A Offshore Wind Farm

The Offshore installation vessel, HLV Seaway Strashnov, and the Heavy Lift Crane Vessel, Seaway Alfa Lift will install offshore wind turbine foundations, within the Dogger Bank A construction area.

The works  will commenced on the 26th of September 2022, continuing until approximately Q1 2024 The works will be continuous 24 hours a day.  A running list of the next locations to be installed and completed foundation locations are presented in the Weekly Notice of Operations.

 

The installed monopiles are marked with temporary lighting with the following characteristics:

 

•           Flashing (Fl) Yellow (Y) 2.5 seconds (s)

•           IALA Availability Category 2 (not less than 99.0%)

•           360° visibility – up to two lights per structure may be used to achieve this

•           At least 2 nm range.

 

During operations, the HLV Seaway Strashnov and the Seaway Alfa Lift will be restricted in ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessels will also transmit an Automatic Identification System (AIS) message.

 

During operations, a Statutory Safety zone of 500m radius will be in place around the HLV Seaway Strashnov and the Seaway Alfa Lift during the installation of foundations.  The safety zones will be monitored by a guard vessel. The primary response will be to warn passing traffic of the ongoing works and any active safety zones, and to alert any vessels where an infringement may occur or has occurred.

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Foundation Installation Campaign - Dogger Bank B Offshore Wind Farm

The Offshore installation vessel, HLV Seaway Strashnov, will install mono-pile foundations in the Dogger Bank B offshore windfarm construction area

The works will commence on the 17th of April 2024, continuing until approximately Q3 2024. The works will be continuous 24 hours a day. A chart of the DBB construction area and the foundation locations are provided below. A running list of the next locations to be installed and mono-piled locations are presented in the Weekly Notice of Operations.

 

The installed monopiles will be marked with temporary lighting with the following characteristics:

 

•           Flashing (Fl) Yellow (Y) 2.5 seconds (s)

•           IALA Availability Category 2 (not less than 99.0%)

•           360° visibility – up to two lights per structure may be used to achieve this

•           At least 2 nm range.

 

During operations, the HLV Seaway Strashnov will be restricted in ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessels will also transmit an Automatic Identification System (AIS) message.

 

During operations, a Statutory Safety zone of 500m radius will be in place around the HLV Seaway Strashnov.  The safety zones will be monitored by a guard vessel. The primary response will be to warn passing traffic of the ongoing works and any active safety zones, and to alert any vessels where an infringement may occur or has occurred

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OSP Commissioning - Dogger Bank B Offshore Wind Farm

The Dogger Bank B Offshore Substation Platform (OSP) will undergo a Commissioning phase within the Dogger Bank B construction area

The Jack up Vessel (JUV) HEA Leviathan will jack up and connect to the DBB OSP by a fixed gangway. The HEA Leviathan will remain on site during the Commissioning phase, acting as the accommodation platform and OSP emergency evacuation vessel.

 

The works will commence on approximately the 19th of April 2024, continuing until approximately 17th August 2024. The works will be continuous 24 hours a day.

 

During operations, a Statutory Safety zone of 500m radius will be in place around the HEA Leviathan for the duration of the Commissioning phase of the DBB OSP. Vessels are requested to maintain a minimum safe passing distance of 1km from the HEA Leviathan during the operation.

 

The Platform Supply Vessel (PSV) SAR Loke will support the HEA Leviathan, carrying out regular supply runs to the offshore site.

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Foundation Installation Underwater Noise Monitoring -Dogger Bank B Offshore Wind Farm

On behalf of Dogger Bank Windfarm, Subacoustech Environmental Ltd will carry out underwater noise monitoring during the first five mono-piling operations to install foundation monopiles using the Service Operations Vessel, Edda Boreas, within the Dogger Bank B construction area

The works will commence on the 14th of April 2024, continuing until the first twelve piling operations are complete. The works will be continuous, 24 hours a day.

 

For each monitored piling event, the Edda Boreas will deploy a transect of up to four hydrophones on the seabed. The distances have been set at 750m, 1,500m, 5,000m and 10,000m from the piling site. Noise measurement equipment will consist of Autonomous Recording Units (ARUs) with one low sensitivity (Hi-SPL) hydrophone per unit at an approximate 2/3rd water depth. Each ARU will be moored by a fixed weight to the seabed. Equipment will be deployed prior to the start of piling operations and will be retrieved after completion. 

 

During operations, the Edda Boreas will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. 

 

It is requested that all vessels maintain a minimum of 500m separation distance from the Edda Boreas and pass at reduced speed

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Offshore Construction - Dogger Bank A Offshore Wind Farm

Offshore Construction of the Dogger Bank A Offshore Wind Farm commenced on the 18th of March 2022. The development of the windfarm is made up of several elements - current ongoing elements  are described below in the 'full notice' and in the attached file. This notice will be updated weekly, giving information on the progress and resources involved in the offshore project.

The development of the windfarm is made up of several elements - current ongoing elements include:

 

The Offshore installation vessel, HLV Seaway Strashnov has completed installation of all 95 monopile foundations, within the Dogger Bank A construction area.  

 

The installed monopiles will be marked with temporary lighting with the following characteristics:

 

•           Flashing (Fl) Yellow (Y) 2.5 seconds (s)

•           IALA Availability Category 2 (not less than 99.0%)

•           360° visibility – up to two lights per structure may be used to achieve this

•           At least 2 nm range.

 

The HLV Alfa Lift will continue TP installation in the Dogger Bank construction area.

 

Temporary lighting on 7 installed monopiles is currently inoperative (NtM LF500013-MIP-DOG-NOT-0026 NtM-DBA Monopiles unlit refers)

 

Construction Support Activities

 

The Offshore Construction Support Vessels, Edda Boreas, Grampian Tees, Grampian Derwent, Grampian Tyne and Esvagt Froude will carry out construction support activities within Dogger Bank A construction site.

 

The works will be performed in a single campaign, commencing on the 6th of November 2022 and continuing until approximately 30th September 2023. The works will be continuous, 24 hours a day.

 

IAC Installation and Post-lay Burial Operations

The Multi-Purpose Offshore Vessel, Livingstone, is currently conducting Inter Array Cable Post-Lay Burial operations. The works will be continuous, 24 hours of day.

 

During operations, the Livingstone, will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessels will also transmit an Automatic Identification System (AIS) message.

 

Wind Turbine Generator (WTG) Installation

The Jack-up WTG Installation Vessel, Voltaire, will install wind turbine generators (WTG) within the Dogger Bank A construction area.

 

The Voltaire is currently undergoing routine maintenance and is not on site until May 2024

 

The works commenced on the 18th of July 2023, continuing until approximately Q4 2024.  The works will be continuous, 24 hours a day.  A running list of the completed WTG installations and the next locations to be installed is presented in the Installation progress table in the WNoO.

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Penguins - Anchor Pre-lay

Anchor pre-lay at penguins prior to MODU arrival.

Install of anchors and chain prior to arrival of MODU 

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Wood Supplementary Valve Skid (SVS) Installation

The Wood Supplementary Valve Skid (SVS) workscope will be conducted over two phases in Q3 2023 and Q2 2024, an Isolation Valve Structure (IVS) was installed 11th August 2023 with an as laid position of (57°21'47.5"N 01°26'32.3"E). The SVS and adjoining spools will be installed between positions (57°21'48.4"N 01°26'32.8"E) and (57°21'47.8"N 01°26'31.7"E) over the period 10th April to 30th April 2024 with a DSV infield for approximately 2-3 weeks.

See attached files MON-SIV-GE-LY-00002-001_I01_1.pdf and MON-SS-GA-00009-003_C04_2.pdf which show the current status and details of the IVS and MON-SS-GA-00020-001_C01_1 - Wood Well Layout - Sheet 1.pdf which shows the proposed layout on completion of all works.  

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Geophysical Site Survey - UKCS Block 29/7

It is planned to undertake geophysical site survey activities within UKCS Block 29/7.The purpose of the survey activities is to undertake an anchor conditions and debris survey at the location, for the potential emplacement of a semi-submersible rig.

Data will be acquired over the survey area using a parametric sub-bottom profiler (SBP), CHIRP sub-bottom profiler (cSBP), multi-beam echosounder (MBES), side scan sonar (SSS), and magnetic surveying equipment.  The site survey will be conducted over a 4 km x 4 km (16 km2) survey area with a 36 km2 greater working area (GWA).  The survey equipment will be operated within the survey area.  The survey vessel will make line turns outside of the survey area but within the GWA.

 

The survey vessel undertaking the survey operations is the Fugro Searcher (Call-sign C6E15; IMO 9504011).

 

The co-ordinates provided below are for the Greater Working Area.

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Site Survey - UKCS Block 29/3 - Central North Sea

The plan is to undertake geophysical site survey activities within UKCS Block 29/3. The purpose of the survey activities is to assess the anchor conditions and complete a debris survey ahead of the potential emplacement of a semi-submersible rig.

Data will be acquired over the survey area using a parametric sub-bottom profiler (SBP), CHIRP sub-bottom profiler (cSBP), multi-beam echosounder (MBES), side scan sonar (SSS), and magnetic surveying equipment.  The site survey will be conducted over a 4 km x 4 km (16 km2) survey area with a 36 km2 greater working area (GWA).  The survey equipment will be operated within the survey area.  The survey vessel will make line turns outside of the survey area but within the GWA.

 

The proposed survey vessel is the Fugro Searcher (call Sign C6E15; IMO 9504011).

 

The co-ordinates provided below are for the survey Greater Working Area

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Metocean Survey - Salamander Offshore Wind Farm

FLiDAR 2 buoy SWLB086 has detached from its mooring and is currently drifting. The Green Isle (2IAV3) is currently on its way to recover the buoy this evening and bring to shore. The buoy is still operating and is being tracked. The buoy is equipped with AIS (MMSI 992351430). It has a yellow float (2.8 m wide) with black mast. The mooring and clump weight anchor that FLiDAR 2 buoy was attached to is assumed to be on the seabed as per the as-laid coordinates; it could present a snagging hazard.

Planned deployment within the Salamander Offshore Array Area consists of:

  • 2x Fugro Sea-watch LiDAR Buoys (SWLB079 and SWLB086)
  • 1x Fugro Wavescan Metocean Buoy (WS164) with a Nortek Signature 250 kHz Acoustic Doppler Current Profiler (ADCP) on the keel weight.

Illustrative figures showing the buoy dimensions and general mooring arrangement are provided in the attached NtM.

 

Once in the water the top of the tallest mast is around 4 meters above the sea level. The buoys' drifting radius is approximately 240 m from their deployment positions. 

 

The buoys are fitted with the following navigational safety features:

  • Buoys painted yellow in colour;
  • Yellow St Andrews Cross;
  • Passive radar reflector (Mobri S-4);
  • AIS AtoN (with MMSI numbers: 992351428, 992351430, 992351429); and
  • Marine lantern (with flash character Fl (5) Y 20s - 5 yellow flashes every 20 seconds) with a range of 4 nautical miles.
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Anchor Spread - Suspended Well 9/08-2

Anchor spread and Rig in place.

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Anchor Spread - Suspended Well 9/08-1

Anchor spread and Rig in place.

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Trawl Sweep - Don Decommissioning

Trawler Westro PD20 conducting an overtrawl survey of recently decommissioned subsea oil field, Don.

Trawler Westro PD20 will be making a verification sweep of the former 500m zone at Don subsea oil field to confirm that area is suitable for normal fishing operations to proceed following decommissioning

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Plug & Abandonment Operations - 9/08-2 Well

Arrival of the Ocean Patriot to commence P&A operations at 9/08-2 well.

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Benthic Survey - Thistle Wind Partners proposed (E3) Offshore Wind Farm

Thistle Wind Partners are developing the proposed Bowdun (E3) Offshore Wind Farm. Please be advised that Ocean Ecology Ltd (OEL), on behalf of Thistle Wind Partners (TWP), is undertaking a benthic survey of the proposed Bowdun (E3) Offshore Wind Farm Array Area and Export Cable Corridor. The purpose of this Notice to Mariners (NtM) is to outline the working area for the survey vessel, as well as the scope of work. The survey will utilise the vessel DSV Curtis Marshall.

Ocean Ecology Ltd (OEL) will be undertaking a benthic characterisation survey inclusive of a drop-down camera assessment, seabed grabs and water sampling. The survey operations do not involve towed survey equipment. The works will be completed by personnel from OEL onboard the vessel DSV Curtis Marshall. Works will be carried out on a continuous basis, 24-hours per day, seven days a week.

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Benthic Survey - Thistle Wind Partners proposed (NE2) Offshore Wind Farm

Please be advised that Ocean Ecology Ltd (OEL), on behalf of Thistle Wind Partners (TWP), is undertaking a benthic survey of the proposed Ayre (NE2) Offshore Wind Farm array area and export cable corridor. The purpose of this Notice to Mariners (NtM) is to outline the working area for the survey vessel, as well as the scope of work. The survey will utilise the vessel DSV Curtis Marshall.

Ocean Ecology Ltd (OEL) will be undertaking a benthic characterisation survey inclusive of a drop-down camera assessment, seabed grabs and water sampling. The survey operations do not involve towed survey equipment. The works will be completed by personnel from OEL onboard the vessel DSV Curtis Marshall. Works will be carried out on a continuous basis, 24-hours per day, seven days a week.

 

The vessel will be restricted in their ability to maneuver and will display the appropriate lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea. Other vessels are requested to provide a minimum clearance of 500 m from the survey vessel during marine operations and pass at a safe speed. Regular security messages will be issued on VHF Channel 16 and this Channel will be always monitored by the vessel. The vessel will also transmit regular Automatic Identification System (AIS) messages.

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PrePARED Fish Tracking Array - Beatrice and Moray East Offshore Windfarms

Marine Scotland Science (MSS) intend to continue servicing 87 acoustic fish tracking moorings in the Beatrice and Moray East Offshore Windfarms (BOWL (38 moorings) and MEOW (49 moorings)) as part of the PrePARED programme of works. The moorings will be deployed from the 15th of April 2024 by the Waterfall a small work catamaran. The moorings will be removed by the 30th of August 2026.

Marine Scotland Science (MSS) intend to continue servicing 87 acoustic fish tracking moorings in the Beatrice and Moray East Offshore Windfarms (BOWL (38 moorings) and MEOW (49 moorings)) as part of the PrePARED programme of works. PrePARED is a collaborative research project which aims to concurrently study predator (seabird and marine mammal) and prey (fish) distribution and behaviour in and around offshore wind farms. The moorings hold research equipment that support hydrophone receivers. These receivers log the presence of fish, such as Cod, Haddock and whiting which will be tagged with acoustic ID tag transmitters. In the attached is a map and a table with the proposed locations of these moorings. Positions are given in WGS84 in degrees and decimal minutes. The moorings will be deployed from the 15th of April 2024 by the Waterfall a small work catamaran. The moorings will be removed by the 30th of August 2026.

 

Fish will be caught using fishing rods and released in timed release cages. The Fish capture and timed release cages will be deployed overnight max (48h). They will be marked with small creel style floats with “Marine Scotland Science” written on them. They will be at least 100m from turbine locations. Up to 5 cages will be deployed in MEOW and BOWL sites and the locations notified to the MCC they will be in proximity to the positions in the attached.

 

For clarity the acoustic fish tracking moorings are shown in Figure 2 in the attached, the fish traps are shown in figure 3 and a schematic of the mooring used for both the fish traps and timed release cages is sown in figure 4. Table 1 shows the locations of the acoustic fish tracking moorings these are not the locations of the fish traps or timed release caged which will be notified on a daily basis. They will however be within 100m of these locations.

All enquiries should be made to the Marine Scotland acoustics mailbox (acoustics@scotland.gsi.gov.uk)

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Hydrographic Survey - East Solent

Notice is Hereby Given that commencing over a period of approximately 5 months starting from start of April 2024, survey operations will be undertaken in the East Solent and off the coast of Hampshire / West Sussex onboard survey vessel 'White Ribbon'.

A-2-Sea Solutions Ltd will be operating the vessel ‘White Ribbon’ on a 12-hr basis during daylight hours. The ‘White Ribbon’ (7.9m LOA), will be underway throughout operations, sailing survey lines at 3-8 knots, dependant on water depth (slower in shallower water). ‘White Ribbon’, will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF 16.

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Hydrographic Survey 80nm SW of the Isles of Scilly - Celtic Deep

Nautical Charting Survey Operations Celtic Deep. Survey operations will be undertaken commencing from November 3rd 2023 for a period of approximately 6 weeks and then continuing from 3rd of January 2024 for a further 4 months.

A-2-Sea Solutions Ltd will be operating the vessel Mintaka 1 on a 24-hr basis. The ‘Mintaka 1’ (40m LOA) will be underway throughout operations, sailing survey lines at 5-10 knots. ‘Mintaka 1’ will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

 

Please note that no towed equipment is to be deployed, this is primarily an multibeam echosounder survey for nautical charting purposes. Towards the end of the survey seabed sampling via grab sampler will be undertaken.

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Seabed Monitoring Programme - Anglian Regional

Please be advised that from 28 April 2023 companies of the Anglian Offshore Dredging Association (AODA) will be undertaking seabed sampling surveys and geophysical survey of aggregate dredging areas in the Anglian Dredging region, from the sites shown in Figure 1. The seabed sampling survey will deploy a grab sampler at each of these sites and recover a seabed sample for processing onboard the vessel for further analysis.

Geophysical survey works will be completed by personnel from Manor Renewable Energy from the survey vessel Manor Venture. Vessel details are presented below in Table 1. The work is expected to take approximately 4-6 weeks in suitable weather conditions, although adverse weather conditions may mean that the total estimated survey time is spread over a longer period.

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Seabed Monitoring Programme - Thames Regional

A geophysical and grab survey will be conducted in the regions attached to this notice during March and June 2024.

Please be advised that from March 2023 the Thames Estuary Dredging Association will be undertaking a geophysical and seabed sampling surveys in the Tames region within the areas shown in the charts. The surveys will employ hull-mounted multibeam echo sounder and towed sidescan sonar systems to acquire seabed data and a Hamon grab and / or a seabed video system to acquired seabed samples.

 

The geophysical works will be completed by personnel from Manor Renewable Energy Ltd. Vessel details are provided in the attached notice. The work is expected to take approximately 6 to 8 weeks in suitable weather conditions, although adverse weather conditions may mean that the total estimated survey time is spread over a longer period.

 

This notification is intended for circulation to all interested parties undertaking activities in the vicinity of the planned survey works.  Further details regarding the surveys can be obtained by contacting either the Liaison Programme Coordinator or the Fishing Liaison Representative using the contact details at the head of this communication.

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Remedial Works - Islay – Orsay

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be undertaking remedial works to a subsea electricity cable. The work will be carried out between low and high water on the shores on Islay and Orsay.

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be undertaking remedial works to a subsea electricity cable. The work will be carried out between low and high water on the shores on Islay and Orsay.

 

Remedial works at Islay and Orsay landfalls will commence Friday 23rd - 24th April and are expected to take 2 days to complete.

 

Work Description

Site personnel will be installing cast iron split pipe to exposed sections of subsea cable between low and high water at both Islay and Orsay landfalls. The exposed subsea cable on the Islay landfall will also be reburied by utilising an excavator (where ground conditions permit). A pioneer support boat will also be utilised to offer support to personnel at each landfall. Operations will be conducted during daylight hours only and are weather/tide dependent.

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SHEPD Subsea Inspections - Orkney Islands

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections of several cables across the Orkney Islands.

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections of several cables across the Orkney Islands.

 

The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates listed in the attached NtM.

 

 

VESSEL DETAILS

The vessel [Offshore Sensor] to be used during the survey and inspection campaign is owned and operated by Aspect Land & Hydrographic Surveys Ltd. Operations will be limited to daylight hours only.

Offshore Vessel will be restricted in its ability to manoeuvre and will display the appropriate lights and shapes. Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations.

The vessel will monitor VHF Channel 16 throughout survey operations.

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Maintenance Works ANS1 Minsmere & ANS2/ANS3 Lowestoft - Hornsea Project Three Offshore Wind Farm

Please find attached two Notice to Mariners for upcoming maintenance works on the artificial nesting structures (ANS) on behalf of the Hornsea Project Three Offshore Wind Farm in Lowestoft and Minsmere. The estimated duration of works is one week from the w/c 8th April 2024 (subject to conditions).

Mariners are advised that Orsted Hornsea Project Three (UK) Limited (hereafter ‘Orsted’) are attending site to perform routine maintenace at:

  • ANS1, Minsmere 
  • ANS2, Lowestoft
  • ANS3, Lowestoft

The maintenance will be undertaken on the kittiwake artificial nesting structure which was constructed as part of a compensation scheme associated with the Hornsea Project Three Offshore Wind Farm (Hornsea Three) project, located within the UK Sector of the North Sea. Hornsea Three are undertaking annual maintenance of the ANS structure in accordance with Marine Licence L/2022/009523/1.

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Sofia OWF - Foundation Installation Works & Noise Monitoring Works

All Mariners are advised that in the week commencing 15th April 2024, through week commencing 15th July 2024, the Baltic Explorer will Noise Monitoring works within the Sofia Offshore Wind Farm Array. The Wind Turbine Installation Vesse 'Aeolus' is also expected on site week commencing 15th April 2024, through week commencing 12th May 2024 to commence Foundation Installation Works within the array site.

Noise Monitoring Works (Baltic Explorer)

The Baltic Explorer will commence deployment, operation and retrieval of noise monitoring stations deployed within the Sofia Offshore Wind Farm Array. Five stations will be deployed for the purpose of noise monitoring during the first four monopile foundations installation. Each station consists of two chain anchor blocks, a buoy including a Fl (5) Y 20s navigation light with nominal range of 2nm, and a hydrophone. The noise monitoring buoy and mooring schematic are outlined within the relevant Notice to Mariners (NtMs).

 

Foundation Installation Works (Aeolus)

The Aeolus will commence the Offshore Foundation Transport and Installation works within the Sofia Offshore Wind Farm Array. These works include the transport and installation operations of primary components, namely Monopiles, and secondary components, namely Main Access Platforms, Internal Platforms, Boat Landings and Upper Ladders.

 

The Sofia Offshore Wind Farm Exclusion Zone coordinates, where the SSSV Baltic Explorer and WTIV Aeolus are going to operate are shown below and included within the relevant NtM.  Mariners are requested to remain outside this Exclusion Zone.

 

Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain outside of the areas identified.

 

SSSV Baltic Explorer and WTIV Aeolus will be transiting to Sofia Offshore Wind Farm field from port of Tyne in the UK.

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Scour Protection Installation Works - Sofia Offshore Wind Farm

All Mariners are advised that the Fallpipe Installation Vessel 'Nordnes' commenced scour protection works at various Wind Turbine Generator (WTG) locations within the Sofia Offshore Wind Farm Array until approximately the end of March / early April 2024.

The Nordness will transit to and from site to replinish rock when required.

 

Two layers (armour & filter) are foreseen to be installed for the scour protection: The armour layer will be installed at all 100 WTG locations and the filter layer will be installed at 88 of the WTG locations.

 

All Mariners are requested to remain outside the works area are identified within the table above and pass at a safe speed and distance. Mariners should be aware there will be a reduction in navigable depth of up to 9% at all 100 WTG locations following the installation of the scour protection.

 

Vessel information in relation to these scope of works are outlined below;

 

Vessel Name Vessel Type Length (m) Draught (m) Call Sign MMSI Number
Nordness Subsea Rock Installation Vessel 166.70 10.51 PHOG 244962000
Enterprise II Guard / Scout Vessel 26

4.7

MPFN7 232006130

 

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OSP Topside Installation Phase 2 - Dogger Bank B Offshore Wind Farm

In the Second of two phases, the offshore installation vessel, HLV Saipem 7000, will install the DBB Offshore Substation Platform (OSP) Topside within the Dogger Bank B construction area

The works will commence on approximately the 07th of April 2024, continuing until approximately the 18th April 2024. The works will be continuous 24 hours a day. The progress of the installation work and its completion is presented in the Weekly Notice of Operations. 

 

During operations, the HLV Saipem 7000 will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. 

 

There will also be 1no. tow tug Pacific Discovery towing 1No. unmanned cargo barge Castoro XI carrying the OSP Topsides to be installed and an additional anchor handling tugs, Fram Prince and Atlantic Kestrel. See Table below for details. Tow tug and AHTs will also transmit AIS messages. 

 

During operations, a Statutory Safety zone of 500m radius will be in place around the HLV Saipem 7000 during the installation of the DBB OSP Topside. The HLV Saipem 7000 will deploy anchors (12No.) in an area with approximately up to 2km radius from OSP installation location. Vessels are requested to maintain a minimum safe passing distance of 2km from the Saipem 7000 during the operation. 

 

The safety zones will be monitored by a guard vessel. The primary responsibility is to warn passing traffic of the ongoing works and active safety zones.

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Benthic Characterisation Survey - Llyr Floating Offshore Wind Farm

Please be advised that from the 5th February 2024 Ocean Ecology Ltd (OEL), on behalf of Ll?r Floating Wind Limited will be undertaking a benthic characterisation survey inclusive of a drop-down camera assessment and seabed grab sampling within the areas detailed in the attachement. The works will be completed by personnel from OEL onboard the vessel Argyll Explorer, which will mobilise from Milford Docks in Milford Haven.

The survey is scheduled to be completed by the 30th March 2024. Works will be carried out on a continuous daily basis working 12-hours per day pending on weather and access restrictions imposed by the Castlemartin Firing Range.

 

Upon adverse weather conditions, if the Argyll Explorer is not able to hold on position, it will seek shelter or return to Milford Docks in Milford Haven.

 

This notification is intended for circulation to all interested parties undertaking or managing activities in the vicinity of the planned survey works. If you would like further details regarding the surveys, please contact the OEL Head of Survey, Ashley Kirby using the contact details at the head of this communication.

 

 

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Navigation Warning Off Station Cardinal Buoy - Sofia Offshore Wind Farm

Mariners are advised that the an East Cardinal Buoy (E4) marking the perimiter of the Sofia OWF array was reported off station and has since been recovered.

It is expected that the mooring remains in position at the as built location. All components are expected to be on the seabed, however please avoid the area by 100m until further notice.  Water depth at this location is 27m LAT.

 

Further details are detailed below.

 

Buoy ID Latitude Longitude Characteristics
East Cardinal E4 54° 55.085’ N 002° 26.631’ E
  • Pillar shaped with an east cardinal shaped top mark
  • Exhibiting a V Q (3) 5s light character

 

The Voe Earl is expected on site from around the 30th March 2024 for the reinstatement of the East Cardinal Buoy “E4”.

 

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Construction of Wind Farm - Triton Knoll

Activities related to the development of the Triton Knoll wind farm continue, as detailed below. For background information visit: http://www.tritonknoll.co.uk. Mariners are advised that the asset installation phase of the Triton Knoll OWF is now complete.

Mariners are advised that the following vessels are expected to commence operations at the Triton Knoll Offshore Wind Farm (TKOWF) as outlined within recently issued NtM's

 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

CRC Vulcan Support Vessel 2EAH2 235083437 - Grimsby

22/03/2024 -

28/03/2024

Lieutenant P Support Vessel 2HEO6 235103032 - Grimsby 04/04/2024

 

The CRC Vulcan will only be operating for a period of 1 – 2 days maximum over the period 22 – 28 March, weather dependant. Seabed surveys will be conducted around the following locations, to an extent of 300m around each asset:

53° 26.15' N x 000° 51.29' E

53° 31.87' N x 000° 48.13' E

 

The Lieutenant P will be conducting Drone Inspections for approx 4 weeks, weather dependant, across the whole Wind farm.

 

Mariners are advised that the following vessels continue to be active at the Triton Knoll Offshore Wind Farm (TKOWF) as outlined within previously issued NtM's:

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Windcat 11 Crew Transfer Vessel 2BIS9 235066459 N/A Grimsby 14/12/2020
Esvagt Havelok Service Operations Vessel OYFR2 219026496 9878981 Grimsby 25/09/2021
Njord Thor Crew Transfer Vessel 2ICE2 235108495 9751810 Grimsby 02/03/2024

 

All vessels can be contacted via VHF channel 16 when operational in field.

 

*** Note ***

 

All 90 WTG's have now been fully installed, whilst WTG commissioning and service continues.

All Export Cables are fully installed/buried and need to be deemed live/energised.

All Inter Array Cables are fully installed and buried and need to be deemed live/energised.

Whilst the main installation works have been completed, major construction commissioning works are continuing.

 

*** Note ***

 

Whilst TKOWFL is reopening the site to fishing from the 14th December 2021, TKOWFL kindly request that all fishermen intending to fish within the boundaries of the Triton Knoll wind farm, contact the Triton Knoll control room prior to entering and exiting the field, and inform them of their fishing intentions.

 

This precaution is requested to safeguard all vessels operational at the TKOWF site (including fishing vessels) and your cooperation, to ensure the safety of all parties is appreciated. The following contact details should be used when notifying the Triton Knoll control room of fishing activity:

 

Control Room Manager: Derek Whyte

Radio: VHF channel 16

Callsign: TK MCC

Phone: +44 1793 896250

Email: tkcr@rwe.com

 

*** Note ***

 

Application of Triton Knoll Wind Farm Safety Zones During Construction

The Secretary of State has granted the Application of Safety Zones on the Triton Knoll Wind Farm Project as follows:

  • 500m “rolling” safety zones around any structure where construction is being undertaken (as indicated by the presence of construction vessels).
  • 50m pre-commissioning safety zones surrounding partial structures or completed structures prior to commissioning.

Mariners are advised that all foundations monopiles have been installed and all inter-array and export cables have been installed.

 

Navigation Warning - 08th January 2021

 

Mariners are advised that the remnants of a Wave Rider Buoy sinker weight and partial rigging are located within the Triton Knoll Offshore Wind Farm Construction site at the following location;

 

53° 30.442N 000° 50.564E

 

It is advised that the partial rigging could potentially be floating up to 9.7m above the seabed, reducing the navigable safe water in the immediate area to 10m LAT.  Mariners are advised to avoid the indicated position by 250 metres.

 

Possible Dangers to Navigation - Properties of the polypropylene show that the rope is buoyant, this makes the line sensitive for thruster currents. Taking the site water depth into consideration (19.7m LAT) and the maximum expected height above seabed of the rope 9.7m the line is expected to be floating submerged at approximately -10m LAT. In addition, it is noted that over time sediments will be trapped between the fibres and the heavier rope may finally sink. The polypropylene rope may impose a risk to foul propellers / propulsion of vessels due to the buoyant nature of the rope. As the rope is submerged at a depth of ~-10m LAT the risk is considered minimum for vessels with a shallow draught (<5m) and medium for a vessel with a deeper draught (>5m). Over time sediments will be trapped between the fibres and the heavier rope may finally sink thereby reducing the risk to propellers/propulsion of vessels. The clump weight itself (chain) is expected to have sunk into the seabed and has no significant height above seabed. In addition, the edges of the clump weight are mostly rounded (chain), the risk the clump weigh imposes to fishing activities/gear is therefore considered to be minimal.

 

Navigation Warning - 16th March 2021

 

Mariners are advised that two UXO targets have been confirmed within the Triton Knoll Offshore Wind Farm Array.

 

Mariners are advised that the two confirmed targets are located within 20 metres water depth (LAT) and a 10 metre radius exclusion zone is required around each target.  The following table provides the coordinates and a description for each target.

 

 

 

Description of Target Latitude Longitude

Water Depth

(LAT) Metres

Required Exclusion

Zone (Metres Radius)

Archaeological - The item is thought to be an air-delivered bomb.  It appears to be in a stable condition and is resting on the seabed.  Marine growth and concretion cover the body, indicating it has been in situ for a significant duration. The tail section of the bomb is missing, which is typical of unexploded bombs from WWII found in these circumstances and there is a significant hole in the case. The dimensions and characteristics gathered are consistent with a 500kg German bomb. Considering the state of the bomb the Net Explosive Quantity of the bomb is likely to be <5kg. 53°31'50.249"N 00°47'45.908"E 20 10
Archaeological - The item is thought to be an air-delivered bomb.  It appears to be in a stable condition and is resting on the seabed.  Marine growth and concretion cover the body, indicating it has been in situ for a significant duration. The tail section of the bomb is missing, which is typical of unexploded bombs from WWII found in these circumstances and there is a significant hole in the case. The dimensions and characteristics gathered are consistent with a 500kg German bomb. Considering the state of the bomb the Net Explosive Quantity of the bomb is likely to be <5kg. 53°31'49.895"N 00°47'45.115"E 20

10

 

Mariners are advised that the following works are planned in and around Triton Knoll Offshore Wind Farm in 2024:

• Subsea Surveys – Approx dates between May/June 2024 for 30 days, weather permitting. Multi-beam Echo Sounder and Towed Side Scan Sonar will be used.  Further information is deatiled within the attached Notice to Mariners (TK 002:2024).

 

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BBL Pipeline Inspection - Balgzand to Bacton

Survey works will be carried out on the route of the BBL pipeline from Balgzand to Bacton, by the vessel Geofocus. Work will commence on 5th April and will last approximately one week.

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Temporary Marker Buoy - Dogger Bank B Export Cable Burial Operations

Rock placement works are currently ongoing for the DBB export cable corridor (please see NtM LF600013-ESI-DOG-NOT-0006). Rock placement is required at KP1.557 to KP1.606 (approx. 49m in length), this will reduce the water depth at that location by up to 20%. A temporary marker buoy will remain in position to the north of the rock berm to mark the area until navigational charting has been updated to reflect the as-built rock berm.

The marker buoy vessel, Bright Blue, will transit to the work site and deploy the temporary marker buoy at the location set out in Table 1. The total duration of this activity will be one working day. Figure 2 below shows the type of marker buoy that will be installed.

 

It is requested that all vessels give Bright Blue a wide berth and pass at reduced speed when the vessel is engaged in deployment activities.

 

All vessels will monitor VHF CH16 and VHF DSC Ch70 continuously throughout.

The marker buoy vessel, Bright Blue, will transit to the work site and deploy the temporary marker buoy at the location set out in Table 1. The total duration of this activity will be one working day. Figure 2 below shows the type of marker buoy that will be installed.

 

It is requested that all vessels give Bright Blue a wide berth and pass at reduced speed when the vessel is engaged in deployment activities.

 

All vessels will monitor VHF CH16 and VHF DSC Ch70 continuously throughout.

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Multibeam Bathymetric and side scan sonar survey - Walney 1 & 2 Export Cables

High-Resolution Multibeam Bathymetric and Side Scan Sonar survey of the Walney 1 & 2 Export Cables. Depending on weather and conditions Survey Operations are planned to commence shortly and can be expected to last for approx. 12 days. This survey will carried out by the 17meter catamaran ‘AMS PANTHER’ working on a 12hr daylight only basis from Fleetwood.

Survey is delayed due to continuing poor weather. Notice will be amended once conditions improve.

 

Attached is a Notice to Mariners issued by ULTRABEAM Ltd concerning a High-Resolution Multibeam Bathymetric and Side Scan Sonar survey of the Walney 1 & 2 Export Cables.

 

Depending on weather and conditions Survey Operations are planned to commence shortly and can be expected to last for approx. 12 days.

This survey will carried out by the 17meter catamaran ‘AMS PANTHER’ working on a 12hr daylight only basis from Fleetwood.

 

All MARINERS PLEASE NOTE that as these survey operations will consist of using high-resolution Multibeam Echo Sounders as well as the towing of Side Scan Sonar at lengths of up to 120m from the stern of the vessel, and along both Export Cables, a wide berth minimum 500 meters is requested whenever the vessel is on site and passing vessels are requested to reduce speed if possible.

 

A small chartlet showing the routes of the two Export Cables along the seabed, from the Sub-Station to the Landfall, as well as a picture of ‘AMS PANTHER’ is included with the NtM

 

In the lead up to and for the duration of this survey fishermen are requested and advised not to set any gear close to and along the whole length of the above-mentioned Export Cables and please re-locate any gear already in close proximity, if in doubt please contact: Tom Watson Mobile 07903 173 624

 

‘AMS PANTHER’ will keep a listening watch on VHF Channels 16 & 14 and can be contacted for information relating to vessel movements only.

PLEASE READ THE NOTICE

Page 1 : Shows a picture of ‘AMS PANTHER’

Page 2 ; Contents

Page 3 ; Project Summary along with small chartlet showing Export Cable Routes along with project information.

Pages 4 & 5 : Pictures and details of the Survey Vessel ‘AMS PANTHER’

 

Please note that the small chartlet on the attached NtM (Page 3) is provided for information purposes relating to this survey only and should not be used for navigation.

Please do not hesitate to contact me if you are unsure about any of the above or require any further information, also please pass this information to any of your colleagues who you think might be interested.

 

If you know of any fisherman who works the area and does not receive this information or anybody else who would benefit from this information please let me know.

 

FISHING INSIDE THE WIND FARM

 

If fishing inside the Wind Farm you are advised to use Dhan Buoys anchored towards the middle of the lane with a long weighted feed line rather than Marker Buoys that can be moved by the strong tides and so foul the Turbines.

 

For more information on the boundaries of the 50 metre Advisory Safety distances please ensure that you have the latest KIS-ORCA information installed - this can be downloaded from www.KIS-ORCA.eu

 

Please also consult the MMO website : https://www.gov.uk/guidance/marking-of-fishing-gear-retrieval-and-notification-of-lost-gear

If in any doubt please contact:

Tom Watson

Mobile 07903 173 624

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Subsea Construction & Pipelay Activities - Talbot & Affleck Developments

Harbour Energy intends to undertake subsea construction & pipelay works on the Talbot Field Development project between March & September 2024. The Field Development traverses across UKCS Blocks 30/07b, 30/12a, 30/13d & 30/13e. In addition, NEO Energy also intends to undertake subsea construction & pipelay works on the Affleck Field redevelopment project commencing ca. 18th April 2024. The Field Development traverses across UKCS Blocks 30/07b, 30/12a, 30/13c, 30/13d, 30/13e, 30/14a & 30/19a.

Talbot Field Devleopment Project

 

Subsea activities on Talbot will commence 31st March 2024 with diving preparatory works within the Judy Platform 500m safety zone.  This will be followed by the installation of a new 15km long 12”/18” Pipe-In-Pipe Pipeline and Electro Hydraulic Chemical (EHC) Control Umbilical between the Talbot Field and the Judy Platform.  A Survey Support Vessel (SUV) will be used to support pipeline and umbilical lay operations as well as performing the pre-commissioning activities for the newly installed pipeline.  A Trenching Support Vessel (TSV) will be used to plough and backfill the pipeline and umbilical.  On completion of pipelay and trenching activities, a rock dump vessel will perform spot rock dump activities along the pipeline and umbilical route and at the existing pipeline crossing locations. 

 

A subsea manifold structure (Talbot DC1 Manifold) will be installed at the Talbot field location using a Construction Support Vessel (CSV).  The CSV will also install a further subsea structure (Talbot SSIV Manifold) within the Judy Platform 500m safety zone. 

 

A Dive Support Vessel (DSV) will perform the tie-ins of the newly installed pipeline and umbilical at the Talbot DC1 Manifold location and within Judy Platform 500m safety zone. The DSV will also support the commissioning of the pipeline and umbilical. 

 

All vessels will be transiting back and forth between the Talbot and Judy locations numerous times during the construction phase.

 

Affleck Field Developmentv Project 

 

Subsea activities on Affleck will commence circa 18th April 2024 with a new 21km 8”/12” Pipe-In-Pipe Pipeline to be laid between the Affleck Manifold and the Talbot Field DC1 Manifold, and a new 36km Electro Hydraulic Chemical (EHC) Control Umbilical to be laid between the Judy Platform and the Affleck Manifold.  In support of the pipelay and umbilical lay there will be a survey support vessel and two Trenching vessels, one to plough and backfill the pipeline and one to jet trench the EHC Umbilical.  The survey support vessel will also be performing the pre-commissioning activities for the newly installed pipeline.  The vessels will be transiting back and forth between these locations numerous times during the construction activities.

 

A Dive Support Vessel (DSV) will be performing the tie-ins of the newly installed pipeline and umbilical at the Affleck Manifold Location, the Talbot DC1 Manifold location and within Judy Platform 500m zone.  The DSV will also support the commissioning of the pipeline and umbilical.

 

On completion of pipelay and trenching activities a rock dump vessel will perform spot rock dump activities along the pipeline and umbilical route and at the existing pipeline crossing locations.  The rock dump activities are currently split into two separate scopes.

 

The earliest start date for Affleck operations to commence is 18th April 2024 with the operations expected to last until the end of September.

 

Key Co-ordinates

 

Key location co-ordinates are given in this bulletin.  Also, please refer to the attached marked-up Admiralty Charts.  

 

There are established 500m safety exclusion zones at all of these locations.   Construction vessels will be operating both within and between all of the above mentioned 500m safety zones during the construction phase.  All mariners are advised to remain clear of these locations until construction operations are completed.

 

Vessel Details

 

The combined Talbot and Affleck operations will be undertaken from the following vessels:

 

Operation

Vessel

Call Sign

Dates in Field

Dive Support Vessel (DSV) – Talbot Preparatory Works

Deep Arctic

C6XW3

March / April

Survey Support Vessel (SUV)

Olympic Triton

LADM3

April / May / June

Talbot & Affleck Pipeline Installation Vessel

Deep Energy

C6YL2

April / May

Construction Support Vessel (CSV) – Talbot Umbilical and Structures Installation

North Sea Atlantic

LAYS7

May

Affleck Umbilical Installation Vessel

Deep Energy

C6YL2

July / August

Talbot & Affleck Pipeline Trenching Vessel (TSV)

Normand Drott

LDRO

May / June

Affleck Umbilical Trenching Vessel (TSV)

Grand Canyon III

LACJ8

August

Dive Support Vessel (DSV)

Deep Arctic

C6XW3

July / Aug / Sept

Rockdump Vessel (FFPV) Pipeline

Nordnes (TBA)

PHOG (TBA)

June

Rockdump Vessel (FFPV) Umbilical

Nordnes (TBA)

PHOG (TBA)

September

Guard vessels

Various

Various

April to Sept

 

 

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Wind Turbine Generator Installation Works – Moray Offshore Windfarm (West) Limited (Moray West)

Moray Offshore Windfarm (West) Limited (Moray West) will be carrying out Wind Turbine Generator Installation Works across the whole of the Moray West site. The Wind Turbine Installation Vessel ‘Wind Orca’ is expected to arrive to site circa 6th April 2024. The work comprises of the installation of 60 x WTGs (Wind Turbine Generators) on the already installed Transition Pieces.

The ‘Wind Orca’ vessel is expected to arrive on site circa 6th April 2024 to complete offshore Wind Turbine Generator (WTG) installation onto the pre-installed monopile and transition pieces on site.  The overall duration is expected to be approximately 6-9 months. The Wind Orca will be supported by the SOV (Service Offshore Vessel) ‘Norwind Breeze’ and two CTV’s (Crew Transfer Vessels) Fob Swath 3 & Fob Swath5.

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Environmental Monitoring Survey - Shearwater Field

Shell U.K. Limited plans to undertake a further Environmental Monitoring Survey over the Shearwater field within UKCS block 22/30b. The Shearwater field is located within the Central North Sea (CNS) ~230 km from the UK coastline and 26 km from the UK/Norwegian median line in a water depth of 90 metres.

Data will be acquired over the survey area using multi-beam echosounder (MBES), side scan sonar (SSS), and magnetic surveying equipment.

 

The monitoring survey operations will be conducted within a 2.5 km x 2.5 km area centred on the Shearwater A platform with a 6.5 km x 6.5 km Greater Working Area (GWA) to allow for turning. The survey will include up to 11 grab sample locations.

 

The Co-ordinates provided below are for the Greater Working Area (GWA)

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Survey - Sound of Papa from mainland Shetland to Papa Stour

On the instruction of Scottish Hydro Electric Power Distribution, a survey campaign is required to provide detailed information on the seabed characteristics and current velocity of an area across the Sound of Papa from mainland Shetland to Papa Stour, to enable a route engineering feasibility study to be undertaken as part of a planned submarine cable installation project.

On the instruction of Scottish Hydro Electric Power Distribution, a survey campaign is required to provide detailed information on the seabed characteristics and current velocity of an area across the Sound of Papa from mainland Shetland to Papa Stour, to enable a route engineering feasibility study to be undertaken as part of a planned submarine cable installation project.

 

MCA Category II vessel - Proteus will be utilized on the project for the offshore element of the project. MCA Category III vessel – Marine Sensor will be utilized for the nearshore element of the project.

 

The survey area is a 1,200m corridor across the Sound of Papa, defined by the coordinates listed in the attached NtM.

 

Survey operations at this location are expected to commence from w/c 8th April 2024, initial works completed over the period of 3 weeks.

 

VESSEL DETAILS All vessels to be used during the survey campaign are owned and operated by Aspect Land & Hydrographic Surveys Ltd. Operations will be limited to daylight hours only.

 

The vessels conducting these surveys will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes. Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations.

 

All vessels will monitor VHF Channel 16 throughout survey operations. Mobile contacts for the vessels are listed at the end of this NtM.

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Export Cable Corridor Geophysical Survey - Thistle Wind Partners Bowdun (E3) Offshore Wind Farm

Thistle Wind Partners are developing the proposed Bowdun (E3) Offshore Wind Farm. The MV Ondine Jule, on behalf of Thistle Wind Partners (TWP), is undertaking a Geophysical survey of the proposed Bowdun (E3) Offshore Wind Farm Export Cable Corridor. The purpose of this Notice to Mariners (NtM) is to update the working area for the survey vessel and, outline the scope of work. The survey will utilise the vessel MV Ondine Jule.

The MV Ondine Jule will be conducting a Geophysical survey over Bowdun (E3) Export Cable Corridor Area utilising towed sensors. During the survey the vessel will be operating at approximately 4 knots with equipment being towed at a distance of up to 300m astern of the vessel.

 

The vessel will be restricted in their ability to maneuver and will display the appropriate lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea. Other vessels are requested to provide a minimum clearance of 500m from the survey vessel during marine operations and pass at a safe speed. Regular Security Messages will be issued on VHF Channel 16 and this Channel will be always monitored by the vessel. The vessel will also transmit regular Automatic Transmission Identification System (AIS) Messages.

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Structure in situ - Leverett CAN

Leverett CAN-basic left in situ until it is recovered by a vessel in June 2024. Following the drilling of the Leverett appraisal well, the Transocean PBLJ and its anchors left the location on 14th February. The Leverett CAN-basic structure will remain in situ at the well location until it is recovered in June.

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Overtrawl Trials - Curlew B

The Westro PD20 will be used to complete Overtrawl Trials of the Curlew B 500m zone, as part of the field Decommissioning Programme. Vessel: Westro PD20 Dates the vessel will arrive in field / depart the field: Window 1st – 30th April. Expected duration 5-7days.

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Pipeline survey - Birgitta and Montrose platforms

Survey of pipeline route between Birgitta and ETAP and Birgitta and Montrose platforms. The proposed survey operations will be undertaken along the centre of the two routes, and within a 2km by 2km box surrounding the proposed Birgitta well locations. The greater working area (including line turns) is a 3km boundary surrounding the total survey area is anticipated to be approximately 208 km2

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Western Isles Remedial Works - Mull-Ulva

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be undertaking remedial works to a subsea electricity cable. The work will be carried out between low and high water on the shore on Ulva.

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be undertaking remedial works to a subsea electricity cable. The work will be carried out between low and high water on the shore on Ulva.

 

Remedial works at Ulva landfall will commence Friday 19th April and are expected to take 1 day to complete.

 

Work Description Site personnel will be installing cast iron split pipe to exposed sections of subsea cable between low and high water at the Ulva landfall on the Mull – Ulva Island cable. A pioneer support boat will be utilised to offer support to personnel.

Operations will be conducted during daylight hours only and are weather/tide dependent.

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Environmental Seabed Survey - Central North Sea

Shell UK Limited is planning to undertake geophysical and environmental site survey and pipeline route survey activities mainly within UKCS Blocks 29/4, 29/5, 29/9 and 29/10, located approximately 225 km east of Scotland. The pipeline route extends into UKCS Blocks 22/30 and 29/5. The purpose of the survey activities is to undertake an Environmental Baseline Survey and associated Habitats Assessment.

The site survey will be conducted over a 6 km x 6.1 km survey area with an 8 km x 8.1 km Greater Working Area (GWA). The pipeline survey corridor is 700 metres wide and the GWA is 2000 metres, 1000 metres either side of the pipeline route.

 

Data will be acquired over the survey area using a parametric sub-bottom profiler (SBP), multi-beam echosounder (MBES), side scan sonar (SSS), and magnetic surveying equipment.  The survey vessel will make line turns outside of the survey area but within the GWA. Seabed samples will also be collected over the site survey area, including pipeline route, and photographic monitoring will also be undertaken. The environmnetal survey is expected to take approximately 25 working days.

 

The Co-ordinates provide below are for the geater working area (GWA).

 

The Survey will be undertaken by the Fugro Searcher, Call sign C6EI5 and IMO Registration number 9504011.

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Rig - Seafox 7

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Subsea Recovery - Victoria Wellhead Protection Structure (block 49/17a)

Following wet store of the Victoria wellhead protection structure (WHPS) (area of approx. 25m x 25m), and on behalf of the Licence Operator (NEO Energy), the WHPS will remain in situ and now be recovered by Offshore Construction Vessel (name & call sign is TBC), during April 2024. (Further update will be provided later in Q1 2024). Guard vessel, GV Jacoba (call sign GCVA) will be on location during this time.

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Potentially hazardous unknown objects (x3) - Frigg Area

As part of an "as found" survey, 3 x potentially hazardous unknown objects have been identified on the seabed in the Frigg area.

A recent review of "as found" data has identified the following 3 x potentially hazardous unknown objects. Further work will be done to agree on how and when to make the area safe:

 

  1. 2 x exposed steel bars protruding from the seabed at an approximate height of 1 - 1.5m
  2. Concrete type material with exposed steelwork
  3. Unknown / potential concrete structure  
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Geophysical Survey - Stromar Offshore Wind Farm

Mariners are advised Stromar Offshore Wind Farm are continuing an offshore geophysical survey from the 02 April 2024 in the Moray Firth around 50 km offshore of Wick, Scotland. Survey completion for the wind farm Array Area and Export Cable Corridor survey works is anticipated by 10th May 2024,

The survey vessel Vos Gorgeous utilising hull-mounted and towed geophysical survey equipment which requires manoeuvring space.

The survey vessel will be deployed to locations within the survey area at times and positions determined by client requirements, weather and sea conditions.

 

Please refer to the attached Notice to Mariners for the further information. 

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Pre-lay of the Penguins mooring system – Penguins

Pre-lay of the Penguins mooring system consists of installation of lower mooring rope, buoyancy modules, upper mooring rope and upper mooring chain. This installation builds on the mooring piles and ground chains which were installed in Q2/3 2020. Note that during (and following) pre-lay, components of the mooring system will be on the seabed and within the water column and therefore this activity introduces a significant snagging hazard to vessels with downlines (including fishing gear).

Vessels - Maersk Achiever & BB Octopus

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Construction energy island - Princess Elisabeth Island in the Belgian part of the North Sea

Construction of the Princess Elisabeth Island. The exclusion zone around the construction site is marked by 4 cardinal buoys (ELI-N, ELI-E, ELI-S and ELI-W).

Transmission system operator Elia is building the Princess Elisabeth Island in the Belgian part of the North Sea. This artificial energy island is an extension of the electricity grid in the North Sea. It connects the future wind farms of the Princess Elisabeth Zone with the Belgian coast and creates new connections with neighbouring countries.

 

The energy island is built centrally in the Princess Elisabeth wind zone, approximately 45 km from the Belgian coast. Construction of the island will take several years. To ensure safety during the works, the Belgian government defined an exclusion zone within which only work vessels are allowed. This zone is marked by 4 cardinal buoys (ELI-N, ELI-E, ELI-S and ELI-W).

 

More information about the Princess Elisabeth Island is available on the Elia website: www.elia.be/projects. 

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Exposed Cable - Shefa-2 (Segment 8)

Shefa-2 Segment 8 cable damage has been repaired. There are sections of wet stored (surface laid) cable that are sensitive to any external impacts and constitutes a snagging risk for anchoring, fishing gear or other equipment with seabed intervention.

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Rig - Deepsea Nordkapp

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Valaris 120

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.

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Rig - Prospector 1

This oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Temporary Hazard - Sheringham Shoal Windfarm Export Cable Corridor

Potential that there are 2 separate lengths of export cable and ducting that have become exposed on the seabed ( Export cable route from Sheringham Shoal Windfarm - see locations in this notification for coordinates.). Potentially this may create an unguarded snagging hazard of approximately 20m for each of the cables/locations identified. A planned survey of the 2 areas is planned to commence on 8th April 2024. Further updates will be provided on completion of survey.

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UXO Inspection - Hornsea Project Three

Mariners are advised that Orsted Hornsea Project Three (UK) Limited will be commencing a scope of UXO inspection works in Q2 2024. The surveys are being undertaken for the purposes of UXO investigations for the Hornsea Project Three Offshore Wind Farm project, located within the UK Sector of the North Sea.

Proposed survey activity:

Two survey vessels will be used for the survey, the Braveheart Spirit and the Four Winds. These will be supported by the Sorrento as a pilot vessel. The Braveheart Spirit is anticipated to mobilise on the 1sth of April from Ijmudien, Netherlands and begin survey works on the 3rd of April. The Four Winds is anticipated to mobilise on the 19th of April 2024 from Imjudien  and begin offshore works on the 21st of April. The works will last for approximately  51 days, allowing for mobilisation, survey operations, de-mobilisation and weather contingency. Note that the vessel will have limited manoeuvrability and it is requested that all vessels operating near the survey vessels maintain a safe distance (at least 500m) and pass at minimum speed.

 

Safety:

It is requested that anybody having knowledge of any potential objects submerged or moored on the seabed within the survey area that could be damaged or form a hazard to the survey vessel and its equipment advises Hornsea Three’s Onshore Fisheries Liaison of their position and nature. Hornsea Three has not requested the clearance of any static fishing gear within the survey boundary shown in Figure 1 and described in Section 7 of this Notice. When surveys commence, a listening watch will be maintained on VHF Channel 12 and 16 when the survey vessel is within the appropriate port authority area and will actively transmit an AIS signal.

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Well Plugged and Abandoned - Hamilton North

It is planned that the 'Valaris' Rig will move from 'Lennox' to 'Hamilton North' for Well Plugged and Abandoned works.

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Dogger Bank C Export Cable Installation, Campaign 1

The cable laying vessel, NKT Victoria, will install the Dogger Bank C export cable in the Southern North Sea in three sections. In addition, concrete mattresses will be installed at the Langeled and SEAL pipeline crossings and the DBB power cable crossing.

The work will be performed in three Campaigns, with Campaign 1 covered by this NtM and starting approximately 09th April 2024 and continuing until approximately 29th April 2024. The work will be continuous, 24 hours a day. Coordinates and chart of the route are provided below. Campaign 1 will start with installation of concrete mattresses at the Langeled and SEAL pipeline crossings and DBB power cable crossing. The mattresses will be installed by NKT Victoria immediately prior to cable installation. A guard vessel will be placed at crossing locations as soon as the mattresses have been installed. Starting from KP91, cable lay vessel NKT Victoria will then simultaneously lay and burial the export cable in a seaward direction to approximately KP175. Cable will be surface laid at the start and end of this section as well as at the crossings and where seabed conditions are otherwise unsuitable for simultaneous lay and burial. The second and third campaigns will separately comprise cable installation between landfall at KP0 and KP91 (campaign 2), and then KP175 and the Dogger Bank C Wind Farm. These campaigns will take place in August through October 2024 and will be covered in a future update to this NtM. During operations the NKT Victoria will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. NOTICE TO MARINERS It is requested that all vessels maintain a minimum of 1.5Nm separation distance from the Cable laying vessel and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor. An Offshore Fisheries Liaison Officer will be onboard NKT Victoria to provide support and coordination to fishing vessels, please see contact details below. In the period between cable lay operation until the cable has been permanently protected by means of burial or rock placement, the cable may be locally exposed on the seafloor and the construction working corridor will remain closed for any static fishing, anchoring or use of other equipment with seabed intervention. During this time the cable is sensitive to any external impact and constitutes a snagging risk for anchoring, fishing gear or other equipment with seabed intervention. To protect the cable in the 900m working corridor, guard vessels will be deployed along the route (described in a separate NtM LF700013-ESI-DOG-NOT-0008). The primary purpose of the guard vessels is to protect the exposed cable along the Dogger Bank C Export Cable corridor by monitoring and issuing warnings to marine traffic operating within 6Nm of the construction area with a Closest Point of Approach (CPA) < 1.5Nm.

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Clair CRX Geophysical Survey

Multi role Survey Vessel "Fugro Venturer" shall acquire geophysical survey and shallow geotechnical investigations south / southwest of Clair Ridge Platform as per the Greater Working Area.

Geophysical survey comprises the following plus transits from / to Aberdeen

1. AUV survey, whereby the AUV flies at around 15m above seabed along programmed lines and the vessel follows the same track above the AUV (10 days work including weather)

2. High res Seismic survey comprising a single streamer of 700m length towed at 3m depth and fitted with a tailbuoy with light and radar reflector (10 days work including weather)

3. Very high res Seismic Survey comprising 4 x 70m length streamers towed immediately behind the vessel, this work is mostly close to Clair Ridge Platform (10 days work including weather) 

4. After a Port Call in mid May the vessel will then acquire shallow Geotechnical CPT and Vibrocore sampling within the working area (approx 14 days work including weather)

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Geological, Topographical and Shallow Gas Hazards Survey - Bruce Infill Well

Serica Energy intends to conduct survey at the Bruce Field - The survey operations are to determine the seabed conditions at the well locations and identify any geological, topographical, shallow gas hazards or environmental conditions which could impair the satisfactory emplacement of a drilling rig at the defined locations.

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Geophysical Survey - Mooir Vannin Offshore Wind Farm Limited

Mariners are advised that Mooir Vannin Offshore Wind Farm Limited (hereafter ‘Mooir Vannin’) will be commencing a scope of geophysical survey works in March 2024. The surveys are being undertaken for the purposes of geophysical investigation for the proposed Mooir Vannin Offshore Windfarm. They survey will be undertaken across the proposed Offshore Array area, Offshore Electrical Connection Corridor and surrounding area.

Please be advised that the operations, carried out by XOCEAN, are anticipated to mobilise from Whitehaven (UK) with investigations targeting the site during March 2024 and April 202., There is potential to overrun into May depending on weather and work progress. 

 

The survey will be undertaken by up to 6 Uncrewed Survey Vessels. Of these, two will be towing survey equipment and so will have reduced manoeuvrability whilst on site. Note that because of this it is requested that all vessels operating near the survey vessels maintain a safe distance.

 

Survey works will be undertaken 24/7 and the vessels will each be lit to allow night time operation. Each vessel is lit with one all around light and port/starboard lights.

 

A support vessel, Gallows Point,  will attend the site as required to support the vessels but will not remain on site full time.

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Offshore Geophysical Survey Operations - Eastern Green Link 2

The geophysical marine survey activities for EGL 2 are planned to recommence on 5 April 2024 , starting offshore in English waters before working south towards Bridlington in May following the route shown in Figure 1. It is proposed that the survey activities will then return to Scottish waters working south from Peterhead, Scotland at the end of May. The survey is due to be completed by the end of June 2024, subject to weather.

Mariners are advised about Marine Survey Works for the Eastern Green Link 2 Project.

 

Scottish Hydro Electric Transmission Plc and National Grid Electricity Transmission Plc are delivering the Eastern Green Link 2 (EGL 2) Project.

The EGL 2 project will play a vital role in achieving the UK and Scottish Government’s net zero targets and significantly increase the UK’s capacity for clean, green renewable power.

 

The survey works for EGL 2 precedes the installation of an electricity transmission link from the East coast of Scotland (Sandford Bay, Peterhead) to the East coast of England (South of Bridlington/ Flamborough Head) due to be completed in 2029.

 

The EGL 2 marine survey works are being carried out by GeoXYZ with the survey vessel ‘Geo Ocean III’ and support vessel ‘GV Fortuna’.

 

The area of work, pertaining to this Notice to Mariners (NtM) is illustrated in Figure 1 and Table 1, with the survey and support vessel contact details found in Tables 2 and 3. Contact details for the project’s Fisheries Liaison Officers are detailed below.

 

The marine survey activities for EGL 2 are planned to recommence on 5 April 2024 , starting offshore in English waters before working south towards Bridlington in May following the route shown in Figure 1. It is proposed that the survey activities will then return to Scottish waters working south from Peterhead, Scotland at the end of May. The survey is due to be completed by the end of June 2024, subject to weather. 

 

The works consist of a detailed geophysical survey for the purposes of identifying potential unexploded ordnance. There are no intrusive works planned nor will there be any unexploded ordnance investigation or detonation works. The vessel will be towing equipment close to the seabed and will have restricted manoeuvrability.

 

All vessels are requested to pass at a safe speed and distance, approximately 500 metres where possible (COLREGs Rule 16 & 18) from the areas identified during marine survey operations. The survey vessel will be restricted in her ability to manoeuvre and shall deploy towed sensors during geophysical survey operations only. The survey vessels will monitor VHF Channel 16 at all times. Mobile contacts for the vessels are listed at the end of this NtM.

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Exclusion Zone established at H05 - Moray East Offshore Wind Farm

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) has established an exclusion zone of 500m around WTG (Wind Turbine Generator) H05. This is due to a section of fibreglass lifting on the roof of the Nacelle, which has the potential to become a dropped object.

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) has established an exclusion zone of 500m around WTG (Wind Turbine Generator) H05. This is due to a section of fibreglass lifting on the roof of the Nacelle, which has the potential to become a dropped object.

 

General Safety Advice

Advise all vessels to exercise caution when at or near the area of H05 ensuring a safe passing distance, extreme vigilance in case the fibreglass roof is dislodged and becomes a danger to navigation. Moray East Marine Coordination Centre will be monitoring the Moray East Wind Farm via AIS. If any further information is required, please contact via the details below.

 

Contact details

The following contact can provide more information if required. Please note that specific queries can also be addressed to the relevant vessel or shore-based representative.

CONTACT DETAILS

Marine Coordination Centre 24/7

Email mcc@morayeast.com

Richard Mutch – Lead Marine Coordinator Email richard.mutch@oceanwinds.com

Tel : +44 07884630427

For fisheries related matters

Alex Winrow-Giffin – Brown and May Marine Ltd. Email: alex@brownmay.com

Tel : +44 1379 872148 / +44 7760 160039

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Met Mast Special Mark light repair - Moray Offshore Windfarm (East)

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) will undergo repairs to reinstate the light at the special mark buoy around the remaining subsea structure at the meteorological mast (Met Mast) (See Figure 1 & Table 1) at the earliest opportunity. Due to weather and other restrictions, the works are still to be carried out and the Met Mast buoy is currently unlit. The next opportunity for Moray East to complete the repairs is now May 2024.

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) will undergo repairs to reinstate the light at the special mark buoy around the remaining subsea structure at the meteorological mast (Met Mast) (See Figure 1 & Table 1) at the earliest opportunity. Due to weather and other restrictions, the works are still to be carried out and the Met Mast buoy is currently unlit. The next opportunity for Moray East to complete the repairs is now May 2024. Another notification will be disseminated in due course once more precise dates and the vessel involved are confirmed.

 

Please be aware that while navigating the area to keep an extra look out for the unlit Met Mast Special marker buoy during the hours of darkness and reduced visibility, until such a time as the buoy is repaired. Please also note that the Met Mast is currently marked by a virtual AtoN.

 

Please be aware that, during the survey activities, by virtue of its mode of operation the vessel will be Restricted in her Ability to Manoeuvre (RAM) as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972, Rule 3). Masters of vessels are therefore requested to maintain their vessels and gears at a minimum safe passing distance from the vessel of 500 metres when it is undertaking work and showing the appropriate shapes and lights in accordance with COLREGs Rule

 

27. In order to not compromise the safety of the Vessel, their crew, and their ability to undertake its contracted works, fishermen who have static fishing gears deployed within 500 m from the Met Mast location (see Table 1 and Figure 1) are requested to provide the coordinates of such deployed gears in DMS and details of whether the surface markers used are visible at all states of visibility to Alex Winrow-Griffin (Brown & May Marine) using the contact information below (Section 58 of the Merchant Shipping Act 1995). Fishermen who have static gears deployed beyond 12 nm are reminded that static gear must be marked in accordance with Commission Implementing Regulation (EU) No. 404/2011

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Environmental Survey Activities - Southern North Sea

Please be advised that Spirit Energy has contracted the Gardline - operated Ocean Geograph survey vessel to undertake an environmental baseline survey at the following sites in the southern North Sea. Ceres Well, UKCS block 47/09c-11; Eris Well, 47/08c-4 ; Seven Seas Well, 48/07c-13; and York Platform, 47/3a.

The survey will employ a range of geophysical and environmental surveying/sampling techniques.

 

The Ocean Geograph is scheduled to commence her mobilisation in Leith as soon as the 1st April 2024 and to commence surveying as soon as the 3rd April 2024.

 

The activities are scheduled to take approximately 10 days to complete, comprising 2 days of operational surveying at each site, and an allowance of 2 days weather downtime / time spent in-field transiting.

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Seismic survey - East Irish Sea

Spirit Energy has contracted the Shearwater GeoServices - operated SW Amundsen survey vessel to conduct a high - resolution 3D seismic survey of the South Morecambe and North Morecambe gas fields, located in UKCS blocks 110/2, 110/3, 110/7, 110/8 and 113/27 of the east Irish Sea.

The vessel is scheduled to commence mobilisation in Liverpool port as soon as 15th April 2024, to commence survey activities as soon as 20th April 2024, and to complete survey activities approximately 30 days later (including an allowance for weather downtime).

 

Note that the inner area shown is where the seismic survey data acquistion itself will be undertaken. The outer area is where line turns, line run-out, and soft start will take place. This outer area will also allow for the deployment and retrieval of streamers, and provide space for weather standby.

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Geophysical and Geotechnical Surveys - Morecambe Offshore Wind Farm

Please be advised that a geotechnical and unexploded ordnance identification survey (geophysical) is due to be undertaken for the proposed Morecambe Offshore Wind Farm. The geophysical and geotechnical survey will be undertaken across the windfarm site, and a section of the export cable route, to provide an overview of ground conditions near surface and at depth across the site. The survey will start on 1st April 2024 at the earliest, for approximately 17 weeks depending on weather conditions

The scope of work involves a UXO survey at intrusive test sites to reduce the risk of encountering UXO during the geotechnical investigations.

 

The scope of works for the Generation Assets includes deep geotechnical investigations:

• 35 Piezocone Penetration Test (PCPT) and 18 collocated sampling Boreholes at the potential WTG locations up to 50-60m depth

 

Shallow geotechnical investigation will include the following:

• Up to 24 vibrocores and CPTs to 5m depth below the seabed along the potential inter-array cable (IAC) route.

• 11 vibrocores and CPTs to 5m depth below the seabed along the ECRC

 

Survey operations will be conducted by the following vessels:

• Ocean Observer – Offshore UXO and Shallow Geotechnical survey • Titan Discovery – Nearshore UXO survey

• Forth Warrior – Nearshore Shallow Geotechnical survey

• Ocean Vantage – Offshore Deep Geotechnical survey

• Horizon Geodiscovery – Offshore Deep Geotechnical survey Vessel details are provided in section 4.

 

The offshore vessels; Ocean Observer, Ocean Vantage and Horizon Geodiscovery will operate on a 24hr basis while the nearshore vessels Titan Discovery and Forth Warrior will operate on a 12hr basis. All vessels will display appropriate day shapes (mast head signals visually indicating the status of a vessel to other vessels on navigable waters during daylight hours) and lights at all times during operations.

 

Exact coordinates of survey locations can be provided via the Fisheries Liaison Officer. Please contact the Fisheries Liaison Officer if you feel the survey affects you and you have not been previously contacted.

 

An Offshore Fisheries Liaison Officer will be onboard the Ocean Observer for the UXO and shallow geotechnical element, and the Horizon Geodiscovery or the Ocean Vantage for the deep geotechnical element to provide advice to the survey contractors and facilitate liaison with the fishing industry.

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Geotechnical Survey Campaign - Caledonia Offshore Wind Farm

Horizon Geobay conducting a Geotechnical survey within the Caledonia OWF area - boreholes, CPTs, P-S Logging

Scope Overview: The purpose of the Detail Design investigation is to collect data at the Caledonia Offshore Wind Farm (OWF) location and to identify local stratigraphy and geological units. The aim of the surveys is to acquire high quality data to inform the Company of the seabed and underlying ground and environmental conditions and in particular to identify the presence or otherwise of any geohazards and risks to the project.

 

2024 Campaign:

3 x  CPT/oversampling boreholes with PQ3 Coring from Bedrock locations

4 x  CPT Sampling boreholes

1 x  Seismic CPT including PS Logging

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Ground Moorings - Schiehallion North West

Eight mooring ground chain and pennant sections remain in place until further notice, at the below noted locations in the Schiehallion NW field. There are no surface buoys or mid-water sections.

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Pre-Installation Pipeline Route Survey - East Irish Sea

Please be advised that Spirit Energy has contracted the Gardline - operated Kommandor multi-role survey vessel to undertake a pre-pipeline installation route survey of a corridor between the west coast of Walney Island, Barrow-in-Furness and the DP1 platform; and the DP1 platform and the DPPA-1 platform, east Irish Sea. DP1 and DPPA-1 are located in the South Morecambe, and the North Morecambe gas fields respectively.

The survey, which will traverse portions of UKCS blocks 113/29, 110/2, 110/3, 110/4 and 110/8 will employ a range of geotechnical, geophysical, and environmental surveying/sampling techniques.

 

The activities are scheduled to take approximately 28 days to complete comprising 22 days of operational surveying, an allowance of 5 days weather downtime, and 1 day spent in-field transiting.

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Rig - Deepsea Aberdeen

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Linus

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Subsea Cable Installation - 2Africa Project

Vessel Ile De Batz - IMO 9247041 will perform the installation of the 2Africa cable within the waters of the United Kingdom. Ile De Batz will be landing 236km in UK Waters from BMH Widemouth Bay.

Operation: The C/S Ile de Batz will enter into Territorial Waters (TW) and Economic Exclusive Zone (EEZ) for shore end Landing, surface lay and burried section installation.  As the area is deemed low risk for cable damage, the cable and associated cable equipment (repeaters) are laid on the surface of the seabed. The cable is simply deployed off the stern of the vessel.  Max speed during surface lay is 7 kt. Dedicated software allows paying out the proper length of cable in order the cable closely follows the bottom contour.

 

Continuous  video & sonar monitoring of the plough operation from the vessel allows the plough to avoid hazards or features of interest, whether these are pre-identified or unexpected. The cable laying vessel will comply with any requirements from local authorities, during installation operations; she will be linked to the bottom by the cable and will have poor manoeuvrability capacities.  She will signal that she has restricted ability to manoeuvre with shapes and/or lights as required by international regulations.  All vessels are requested to keep a clear distance from the cable laying vessel of at least ½ Nautical Mile. The cable laying vessel will broadcast regular safety messages giving current position and activity, and will notify the relevant authorities of the same. 

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Drilling Activity - COSL Innovator at Bittern B1 - ST#1

The COSL Innovator (semi-submersible) will be conducting drilling operations in the Bittern field on the B1 - ST#1 well. This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone. Location of anchors and COSL Innovator have been included. 

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Freespan BBL Pipeline - Southern North Sea

Fishsafe reportable freespan on the BBL pipeline located in the Southern North Sea. Span is 61m in length.

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Galloper Wind Farm - Turbine Paint Repair Campaign (O&M 01-2024)

Please be advised Galloper Windfarm will be carrying out a paint repair campaign, using the site service CTV "Seacat Liberty". The vessel will be operating in the daytime only.

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Western HVDC Link: Offshore survey work (April-May 2024)

Mariners are advised that survey work is due to be carried out along the Western HVDC Link cable route by the vessel MV Ivero. The work is due to start in April and to be completed in May.

The survey will extend along the full 390km length of the WHVDC cable route, from Hunterston in the Firth of Clyde, through the North Channel, to the west and south of the Isle of Man and then towards the Wirral coast.  The location of the survey work is illustrated in a map in the Notice to Mariners.

 

During the survey the vessel MV Ivero will carry out a detailed geophysical inspection survey using a multi aperture sonar data acquisition.  The vessel will be mapping a series of parallel lines along sections of the route using this equipment.  Marine mammal observations and passive acoustic monitoring will be recorded during these operations.

 

Survey Route & Timing

The survey will begin at a depth of approximately 20m below CD at each end of the cable, abutting the shallow water surveys that were completed in August 2023.  The survey will take place within a working area of +/-100m from the published route.

 

The operations are due to begin as early as the 15th of April 20242 and could extend until the 15th of May 2024.  These dates are subject to weather and sea conditions over this period.

 

Vessel details

The MV Ivero is a 34m survey vessel.  It has a blue hull and a white superstructure.  Information about the vessel, including its current location, can be found at the Marine Traffic website using the link below:-

  • MV Ivero: Survey vessel | Call sign MCJO3

The survey vessel will operate on a 24 hour basis.  Possible ports of call include Troon, Campbeltown and Liverpool.

 

The MV Ivero will be towing equipment approximately 1000m from its stern.  Fishing vessels operating in the area are asked to deploy static fishing gear in a manner that will minimise the risk of entanglement during the survey period.

 

The vessel involved in this work may be restricted in its ability to manoeuvre and other vessels are reminded to pass at a safe speed and maintain a wide berth of at least 0.5 nautical miles distance.

 

Vessels operating in the area are asked to contact MV Ivero on VHF Channel 16 to obtain information on planned activity and to allow coactivity and cooperation.

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Hornsea Three - Notification of Geophysical Survey Commencement

Mariners are advised that Orsted Hornsea Project Three (UK) Limited will be commencing a scope of geophysical survey works in Q2 2023. The surveys are being undertaken for the purposes of geophysical investigations for the Hornsea Project Three Offshore Wind Farm project, located within the UK Sector of the North Sea.

Proposed survey activity:

Two survey vessels will be used for the survey, the Geo Ocean IV and the Geo Ocean VI. The work will start with mobilisation in Eemshaven, Netherlands on the 3rd of April 2024 and survey works will begin shortly after. The works will last approximately until the end of September 2024, allowing for mobilisation, survey operations, de-mobilisation, and weather contingency. Note that the vessel will have limited manoeuvrability and it is requested that all vessels operating near the survey vessels maintain a safe distance (at least 500m) and pass at minimum speed.

 

Safety:

It is requested that anybody having knowledge of any potential objects submerged or moored on the seabed within the survey area that could be damaged or form a hazard to the survey vessel and its equipment advises Hornsea Three’s Onshore Fisheries Liaison of their position and nature. Hornsea Three has requested the clearance of any static fishing gear within the survey boundary shown in Figure 1 and described in Section 7 of this Notice. When surveys commence, a listening watch will be maintained on VHF Channel 12 and 16 when the survey vessel is within the appropriate port authority area and will actively transmit an AIS signal.

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Tern - Subsea Infrastructure Disconnection

Dive Support Vessel (DSV) work shall be ongoing at and around Tern Alpha platform and satellite fields. The DSV shall be carrying out works to flush and disconnect subsea pipelines at Kestrel Falcon, Hudson and Cladhan subsea fields.

Work shall commence at or proximate to the following locations:

 

Location

Northing

Easting

Tern Alpha

 

 

Platform

61° 16’ 31.82”

00° 55’ 03.83”

Kestrel

 

 

P1 XT

61° 18’ 34.47”

01° 02’ 30.64”

P2 XT

61° 18’ 35.25”

01° 02’ 31.83”

W1 XT

61° 18’ 35.67”

01° 02’ 34.70”

Falcon

 

 

P1 XT

61° 19’ 50.04”

00° 59’ 28.06”

Hudson

 

 

Hudson Manifold

61° 15’ 08.28”

00° 44’ 01.58”

L1 XT

61° 15’ 37.14”

00° 42’ 26.83”

L2 XT

61° 15’ 36.73”

00° 42’ 26.38”

Cladhan

 

 

Cladhan Manifold

61° 08’ 52.59”

00° 47’ 09.03”

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Revoked Fishing Restriction - Bottom Towed Fishing Gear Byelaw: Gat Reef & Haisborough Tail Reef

The Haisborough, Hammond and Winterton European Marine Site (Specified Areas) Bottom Towed Fishing Gear Byelaw, related to the depicted areas, was revoked by the new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023 (which comes into force on 22 March 2024). These areas are now fully encompassed by new larger areas, as per the link below.

These larger areas now supersede the revoked areas: Bottom Towed Fishing Gear Byelaw 2023: Haisborough Hammond and Winterton

 

Always refer to the website for the most up to date fishing restriction information.

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Amended Fishing Restriction - Bottom Towed Fishing Gear Byelaw: Brentons and Hatt Rock

The Start Point to Plymouth Sound and Eddystone European Marine Site (Specified Areas) Bottom Towed Fishing Gear Byelaw, related to the depicted area, was amended by the new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023 (which comes into force on 22 March 2024).

In summary, the amendments changed the size of the specified area, introduced new interpretations of the terms “bottom towed fishing gear” and “inboard, lashed and stowed”, and included a clause specifying that vessels carrying bottom towed fishing gear must have their gear inboard, lashed and stowed while in the specified areas.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw: Brentons and Hatt Rock

 

Always refer to the website for the most up to date fishing restriction information

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Amended Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Cape Bank

The Lands End and Cape Bank European Marine Site (Specified Area) Bottom Towed Fishing Gear Byelaw was amended by the new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023 (which comes into force on 22 March 2024).

In summary, the amendments changed the size of the specified area, introduced new interpretations of the terms “bottom towed fishing gear” and “inboard, lashed and stowed”, and included a clause specifying that vessels carrying bottom towed fishing gear must have their gear inboard, lashed and stowed while in the specified areas.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw: Cape Bank

 

Always refer to the website for the most up to date fishing restriction information.

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Amended Fishing Restriction - Bottom Towed Fishing Gear Byelaw: Margate & Long Sands A & B

The Margate and Long Sands European Marine Site (Specified Areas) Bottom Towed Fishing Gear Byelaw 2017, related to the depicted area, was amended by the new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023 (which comes into force on 22 March 2024).

In summary, the amendments changed the size of the specified area, introduced new interpretations of the terms “bottom towed fishing gear” and “inboard, lashed and stowed”, and included a clause specifying that vessels carrying bottom towed fishing gear must have their gear inboard, lashed and stowed while in the specified areas.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw: Margate and Long Sands Area A and B

 

Always refer to the website for the most up to date fishing restriction information. 

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Amended Fishing Restriction - Bottom Towed Fishing Gear Byelaw: West of Walney

The West of Walney Marine Conservation Zone (Specified Area) Bottom Towed Fishing Gear Byelaw 2018, related to the depicted area, was amended by the new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023 (which comes into force on 22 March 2024).

In summary, the amendments changed the size of the specified area, introduced new interpretations of the terms “bottom towed fishing gear” and “inboard, lashed and stowed”, and included a clause specifying that vessels carrying bottom towed fishing gear must have their gear inboard, lashed and stowed while in the specified areas.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw: West of Walney

 

Always refer to the website for the most up to date fishing restriction information. 

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Wight-Barfleur Reef

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the Wight-Barfleur Reef Special Area of Conservation. In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Wight-Barfleur Reef

 

Always refer to the website for the most up to date fishing restriction information. 

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: South of Celtic Deep

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the South of Celtic Deep Marine Conservation Zone.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: South of Celtic Deep

 

Always refer to the website for the most up to date fishing restriction information. 

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Offshore Brighton

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the Offshore Brighton Marine Conservation Zone.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Offshore Brighton

 

Always refer to the website for the most up to date fishing restriction information. 

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: N Norfolk Sandbank & Saturn Reef

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the North Norfolk Sandbanks and Saturn Reef Special Area of Conservation.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: North Norfolk Sandbank and Saturn Reef

 

Always refer to the website for the most up to date fishing restriction information. 

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Hartland Point to Tintagel

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the Hartland Point to Tintagel Marine Conservation Zone.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Hartland Point to Tintagel

 

Always refer to the website for the most up to date fishing restriction information. 

 

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Haisborough, Hammond and Winterton

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the Haisborough, Hammond and Winterton Special Area of Conservation.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Haisborough Hammond and Winterton 

 

Always refer to the website for the most up to date fishing restriction information.

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Haig Fras

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the Haig Fras Special Area of Conservation.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Haig Fras 

 

Always refer to the website for the most up to date fishing restriction inform

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Goodwin Sands

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the Goodwin Sands Marine Conservation Zone.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Goodwin Sands 

 

Always refer to the website for the most up to date fishing restriction information.

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Foreland

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the Foreland Marine Conservation Zone.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Foreland 

 

Always refer to the website for the most up to date fishing restriction information.

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Farnes East

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted areas within the Farnes East Marine Conservation Zone.

In summary no bottom towed fishing may take place within these areas and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Farnes East 

 

Always refer to the website for the most up to date fishing restriction information

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New Fishing Restriction - Bottom Towed Fishing Gear Bylaws 2023: East of Haig Fras

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted area within the East of Haig Fras Marine Conservation Zone.

In summary no bottom towed fishing may take place within this area and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: East of Haig Fras 

 

Always refer to the website for the most up to date fishing restriction information. 

 

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New Fishing Restriction - Bottom Towed Fishing Gear Byelaw 2023: Cape Bank

The new Marine Protected Areas Bottom Towed Fishing Gear Byelaw 2023, which comes into force on 22 March 2024, prohibits bottom towed fishing in the depicted area within the Cape Bank Marine Conservation Zone and Land’s End and Cape Bank Special Area of Conservation.

In summary no bottom towed fishing may take place within this area and all bottom towed fishing gear must be inboard, lashed and stowed.

 

Please go to the updated restriction for more information: Bottom Towed Fishing Gear Byelaw 2023: Cape Bank 

 

Always refer to the website for the most up to date fishing restriction information. 

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Cefas Endeavour Monitoring at North-West of Jones Bank MPA (CEND0524)

Under the MPA monitoring programme, Cefas are commissioned to undertake some seabed sampling at the North-West of Jones Bank MPA. This involves grab sampling (0.1m2 Day grab) and camera sledge sampling at 71 stations within the MPA and 85 stations outside the North-West of Jones Bank MPA. The survey will be undertaken during 2nd April to 16th April 2024 aboard the research vessel Cefas Endeavour.  Additional stations within the planned survey area may be added during the survey.

The survey areas are shown via the attached shapefiles.

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Rig move - Irish Sea Pioneer

ISP Rig Move Notification. Planned Rig Move from Douglas Wellhead platform(Liverpool Bay) to Lennox Platform ( Liverpool Bay)

This oil & gas drilling rig is moving to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Surveys at the UMC and Pelican Field

Surveys at the UMC and in the Pelican Field are proposed to comprise of geophysical surveys, with a survey area expanding over 4.12 km x 4.10 km for the Pelican Field and 4.16 km x 4.03 km for the UMC. The surveys will acquire SBES (single beam echosounder), MBES (multibeam echosounder), HMP (hull mounted sub bottom profiler), SSS (side scan sonar), and magnetometer data.

Surveys at the UMC and in the Pelican Field are proposed to comprise of geophysical surveys, with a survey area expanding over 4.12 km x 4.10 km for the Pelican Field (Figure 2.1) and 4.16 km x 4.03 km for the UMC.

Geophysical data acquisition will include SBES, MBES, HMP, SSS, and magnetometer. The acquisition of geophysical surveys in the NNS is expected to commence in Q2 of 2024, and will include:

A total mobilisation of 24 h;

A total geophysical acquisition of 20 days, based on:-

          UMC including approx. 208 survey kms / 53 lines turns / 2.6 days

          Hudson including approx. 339 survey kms / 65 lines turns / 3.8 days

          Otter including approx. 208 survey kms / 53 lines turns / 2.6 days

          Cladhad including approx. 208 survey kms / 53 line turns / 2.6 days

          Pelican including approx. 208 survey kms / 53 line turns / 2.6 days

          Falcon and Kestrel approx. 548.6 survey kms / 83 line turns / 5.8 days

and A total demobilisation of 12 hours.

The line spacing for the Pelican Field and the UMC will be 100 m for main lines (with additional lines through well locations) and 400 m for cross lines.

The seabed and shallow soils survey areas have been designed to allow a minimum of 2 km distance away from any well location in any direction.

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Survey at Otter Field

Proposed geophysical surveys of the Otter Field will cover a survey area of 4.02 km x 4.01 km.

Proposed geophysical surveys of the Otter Field will cover a survey area of 4.02 km x 4.01 km.

The surveys will acquire SBES, MBES, HMP, SSS, and magnetometer data. The acquisition of geophysical data in the NNS is expected to commence in Q2 of 2024, and will include:

     A total mobilisation of 24 h;

     A total geophysical acquisition of 20 days, based on

               UMC including approx. 208 survey kms/53 lines turns/2.6 days

               Hudson including approx. 339 surveys kms/65 lines turns/3.8 days

               Otter including approx. 208 survey kms/53 lines turns/2.6 days

               Cladhad including approx. 208 survey kms/53 line turns/2.6 days

               Pelican including approx. 208 survey kms/53 line turns/2.6 days

               Falcon and Kestrel approx. 548.6 survey kms/83 line turns/5.8 days;

     A total demobilisation of 12 hours.

The line spacing for the Otter Field will be 100 m for main lines (with additional lines through well locations) and 400 m for cross lines. The seabed and shallow soils survey areas have been designed to allow a minimum of 2 km distance away from any well location in any direction.

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Survey at Hudson, Falcon, Kestrel and Cladhan

Surveys in the Hudson Field, Falcon Field, Kestrel Field and Cladhan Field are proposed to comprise geophysical surveys, with a survey area expanding over 5.46 km x 4.86 km for the Hudson Field, 6.80 km x 6.30 km for the Falcon Field and Kestrel Field, and 4.04 km x 4.03 km for the Cladhan Field.

Surveys in the Hudson Field, Falcon Field, Kestrel Field and Cladhan Field are proposed to comprise geophysical surveys, with a survey area expanding over 5.46 km x 4.86 km for the Hudson Field, 6.80 km x 6.30 km for the Falcon Field and Kestrel Field, and 4.04 km x 4.03 km for the Cladhan Field. 

 

These surveys in the Hudson, Falcon, Kestrel and Cladhan Fields, are part of a wider geophysical surveys campaign in the NNS. Geophysical data acquisition will include SBES, MBES, HMP, SSS, and magnetometer. The acquisition of geophysical surveys in the NNS is expected to commence in Q2 of 2024, and will include in total:

     A total mobilisation of 24 hours;

     A total geophysical acquisition of 20 days, based on:

               Underwater Manifold Centre (UMC) including approx. 208 survey kms / 53 lines turns / 2.6 days

               Hudson including approx. 339 survey kms / 65 lines turns / 3.8 days

               Otter including approx. 208 survey kms / 53 lines turns / 2.6 days

               Cladhan including approx. 208 survey kms / 53 line turns / 2.6 days

               Pelican including approx. 208 survey kms / 53 line turns / 2.6 days

               Falcon and Kestrel approx. 548.6 survey kms / 83 line turns / 5.8 days; and

     A total demobilisation of 12 hours.

The line spacing for the Hudson Field, Falcon Field and Kestrel Field, and Cladhan Field will be 100 m for main lines (with additional lines through well locations), and 400 m for cross lines. The seabed and shallow soils survey areas have been designed to allow a minimum of 2 km distance away from any well location, in any direction.

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Geotechnical survey in-situ Cone Penetration Testing block 42/14

Geotechnical survey in-situ Cone Penetration Testing block 42/14 using MV Geoquip Elena.

Site investigation to acquire adequate geotechnical data that will allow for reporting of soil parameters supporting a typical spud can penetration analysis. Data will be collected in-situ by performing Cone Penetration Test (CPT) testing at up to three locations, down to a depth of 30m, situated within 100m of the proposed well location. The MV Geoquip Elena vessel is anticipated to be working on location for up to four days.

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SEAL Nearshore Bacton Inspections 2024

The vessel Titan Endeavor (Call Sign 2ELT9) will be carrying out Inspection operations on the SEAL Pipeline PL1570 at the Bacton nearshore area, as noted below: Duration is ONLY expected to be approx. 2 Days – but a suitable “Weather Window” will be required. Dates = suitable opportunity between 15th February to 15th March 2024. Work not completed yet, Project Dates Extended to : 15th April 2024

The vessel Titan Endeavor (Call Sign 2ELT9) will be carrying out Inspection operations on the SEAL Pipeline PL1570 at the Bacton nearshore area, as noted below:

Duration is ONLY expected to be approx. 2 Days – but a suitable “Weather Window” will be required

Dates = suitable opportunity between 15th February to 15th March 2024

 

Work not completed yet, Project Dates Extended to : 15th April 2024  

 

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Dropped Object - BB17 - Burbo Bank Offshore Wind Farm

There has been a dropped object from turbine BB17 at the Burbo Bank Offshore Wind Farm. Mariners are requested to maintain a distance of 500m from the turbine at all times and until further notice.

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Subsea Cable Bell Mouth and Concrete Mattresses - Kilbrannan Sound

Mariners should be aware of the presence of subsea structures to the north of Port Crannaich where the Carradale to Arran subsea power cable enters a directionally drilled duct by means of a bell mouth.

As part of the works to install a new subsea power cable in Kilbrannan Sound between Carradale and Arran a subsea bell mouth structure was required. Three concrete mattresses were also installed immediately to the west of the bell mouth. Details are provided on the attached notice to mariners.

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Rig - Scarabeo 8

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Noble Integrator

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Noble Innovator

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Asset Preservation Campaign - Dogger Bank A Offshore Wind Farm

The Offshore Supply Vessel, VOS Start, will carry out Asset Preservation operations within Dogger Bank A construction site. The works will be performed in a single campaign, commencing on the 6th of November 2022 and continuing until approximately 5th January 2024. The works will be continuous, 24 hours a day. The operations will include visual inspections and maintenance at installed wind turbine foundation locations.

During operations, the VOS Start will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. It is requested that all vessels maintain a minimum of 500m separation distance from the Offshore Supply Vessel and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working area.

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Export Cable Guard Vessel Deployment - Dogger Bank C Export Cable Route

Installation of the Dogger Bank C Offshore Windfarm Export Cable will commence on the 19th of March 2024. Guard vessels will be deployed to protect the cable bundle from the start of cable lay until the cable is adequately protected by means of trenching or rock placement.

To provide the required coverage, approximately 16 guard vessels will be used in the period from the 19th of March 2024 until the 30th of November 2024. Durations at each location will depend on progress of the cable installation, trenching and rock placement operations. Not all the vessels are expected to be used concurrently.

 

The primary purpose of the guard vessels is to protect the exposed cable along the Dogger Bank C Export Cable corridor by monitoring and issuing warnings to marine traffic operating within 6Nm of the construction area with a Closest Point of Approach (CPA) < 1.5Nm. More specifically, the focus will be on those vessels with potential to be engaging in bottom contact activities such as fishing and anchoring, as these activities pose a risk not only to the exposed cable bundle but also to the vessels themselves.

 

The guard vessels will be clearly marked and display a highly visible "GUARD" sign on each side. The vessels will operate 24hrs, in all but extreme weather. Exchange of vessels on site will ensure the relevant section of cable is never left unguarded.

 

In sections where cable protection has been completed, guard vessels will be released, and sections will be opened up for fishing or use of other of equipment with seabed intervention. This may not necessarily be in a sequential order from shoreside outwards.

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IAC Post-Lay Burial Operations - Dogger Bank A Offshore Wind Farm

The Cable Lay Vessel (CLV) VIKING NEPTUN will perform the inter array cable installation works with the commencement around the 15th of March 2024. The works will continue over different campaigns until the 30th of June 2024. The vessel will further be assisted by the Walk to Work Vessel ESVAGT FROUDE for the deployment of cable pull in teams

The cable lay vessel will deploy the inter array cable onto the seabed through her dedicated deck spread. The cable will remain exposed on the seabed till trenching works by separate spread are performed.

 

During operations, the VIKING NEPTUN and ESVAGT FROUDE will be restricted in their ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. 

 

It is requested that all vessels maintain a minimum of 1.5Nm separation distance from the vessels and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.

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Inter Array Cable Installation - Dogger Bank A Offshore Wind Farm

The Cable Lay Vessel (CLV) Viking Neptun will continue the Inter Array Cable laying operations in the Dogger Bank A OWF, with the third cable installation campaign. The offshore support DP2 vessels Esvagt Froude and Norside Cygnus will assist with cable installation and termination works.

The Esvagt Froude and Norside Cygnus will carry out pull in preparation and continue installation and termination works until approximately 30th of June 2024. The Viking Neptun will commence cable lay works from the 15th of March 2024. The works will be continuous, 24 hours a day.

 

During operations, the Esvagt FroudeNorside Cygnus and Viking Neptun will be restricted in their ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights.

 

The vessel will also transmit an Automatic Identification System (AIS) message. It is requested that all vessels maintain a minimum of 1.5Nm separation distance from the vessels and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.

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Navigational Warning - Demarcation Buoys - Sofia Offshore Wind Farm

Mariners are advised that a number of the Perimeter Buoyage that demarcates the Sofia Offshore Wind Farm as an area under construction have the Top Marks missing. There are also now 3 (three) perimeter buoys that have extinguished lights.

Those demarcation buoys that are now an unlit hazard during hours of Darkness are outlined below;

 

  • N1 - 55° 08.13’ N x 002° 09.52’ E
  • SP2 - 55° 06.57’ N x 002° 05.76’ E
  • E5 - 54° 51.52’ N x 002° 20.71’ E

As N1 & SP2 are adjacent to each other, the Guard Vessel “Enterprise II” will position themselves in this vicinity during the hours of darkness (weather permitting) to monitor vessel traffic movements in the area and direct any vessels away from the unlit hazard.

This will be supplemented with regular safety broadcasts from the Enterprise II. The Guard Vessel will also monitor the array via AIS and Radar.

 

Sofia MCC will also monitor the Sofia Offshore Array remotely via AIS and has initiated triggered guard zones within areas of concern.

 

It is expected that the remedial programme will commence in approx. 7 days (weather permitting).

 

 

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Cable Landfall and Cable Lay Works - Sofia Offshore Wind Farm

All Mariners are advised that all works to reinstate the HDD trenches out to KP3 are suspended until May 2024. This means that the spoil heaps from 2023 back hoe excavation works will now remain in situ works resume, although a level of natural backfill is expected over this period.

The 2 Export Cables & 1 Fibre Optic Cable (all bundled) have been installed into the HDD ducts at Landfall (Marske by The Sea). 

 

Guard vessels will remain be onsite 24 hours per day to monitor the export cable until approximately the end of Q2- 2024.

 

Exclusion zone coordinates for 2023 cable pull-in and cable lay works are detailed within the table above and attached Notice to Mariners (NtM).

 

The coordinates of the guard vessel locations for the cable pull-in and cable lay works for Campaign 1 are detailed within the table above and attached NtM.

 

Mariners are requested to remain where possible 500m from the vessels and leave a wide berth during the installation operations. Fishing vessels are requested to pass at a safe speed and distance and remain outside of the exclusion area identified.

 

Vessels will be monitoring VHF 16 during the scope of the works and shall also be exhibiting the correct day shapes/ lights and flag for vessels engaged in diving operations and restricted in ability to manoeuvre.

 

Special Marker Buoys (SMB) will be in place to mark the HDD works area and will remain in place until completion of the export cable landing activities. The locations of these SMBs are detailed in the above table and attached NtM.

 

***Within the working area there may be a temporary reduction in navigable depth up to 2m due to excavated material being placed in spoil heaps***

 

***Please note that the Ocean Energy (Multicat) has recovered 3 of the 4 (A / B / D) anchors from the seabed nearshore HDD Pits and only one anchor remains in situ on the seabed at the HDD Pit in position “C”***

 

The Ocean Energy (Multicat) may attempt to recover the remaining anchor (C) from the seabed nearshore HDD Pits.

 

Mariners are advised of the following vessels commencing operations at Sofia Offshore Wind Farm (SOWF).

 

Vessel Name Vessel Type Length (m) Beam (m) Draft (m) Gross Tonnage (T) Call Sign MMSI Number
Sancta Maria Guard Vessel 20.37 6 3.03 106 2FOV7 235093015
Inge Guard Vessel 29.7 6.2 3.1 192 YJSN5 577097000
Jason II Guard Vessel 26.02 6.01 3.21 127 MJFY4 232036020
Dolfijn Guard Vessel 27 6.2 3.1 99 YJQL8 576697000
Mary Ann Guard Vessel 32.7 7 3.6 53 YJTV2 577256000
Venus II Guard Vessel 24 7.4 3.15 145 HP9337 370046000
Walvis Guard Vessel 27 6.4 3.32 108 YJQG3 576448000
Flamingo Guard Vessel 31 7 3.5 159 YJVW2 576259000
Haulbowline Guard Vessel 22.3 7 2.7 88 MEZW9 232021354
Star of Hope Guard Vessel 23.9 7.2 3.4 101 MKDN2 232038483
Karima Guard Vessel 26.10 6.0 4.0 88 MPKV5 232006310
Enterprise II Guard / Scout Vessel 26 9.2 4.7 421 MPFN7 232006130

 

The table below also provides the position and description of any equipment/asset/item that will remain in place following demobilisation of the Ievoli Ivory.

 

Location Equipment and Description Latitude Longitude Approximate Depth (LAT)
A

Concrete mattresses

3 of 5.95 m x 2.95 m x 0.30 m

54°38.544’ N 000°35.147’W 55m
B

Concrete mattresses

1 of 5.95 m x 2.95 m x 0.30 m

54°38.572’ N 000°35.142’W 55m
C

Concrete mattresses

2 of 5.95 m x 2.95 m x 0.30 m

1 of 5.55 m x 2.95 m x 0.50 m

54°48.144’ N 000°37.515’E 74m
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UXO Identification Works - East Anglia 3 Offshore Wind Farm & Export Cable Route

UXO Identification using the vessel 'Glomar Wave' will take place at the East Anglia 3 (EA3) OWF & ECR. Work will begin inside the OWF site on approx 17 March 2024. The vessel will mobilise and initially transit from Gt Yarmouth to the site and will pause enroute to perform some trials and calibrations. A work class ROV and onboard survey and positioning equipment will be used. In the event any UXO's are located, the vessel will mobilise with a demolition spread at a date TBD (likely May/Jun)

The whole scope is expected to complete approx. August 2024.

 

More details to follow. 

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Well Plug and Abandonment activities - Sean Romeo 500 MZ

Prospector 1 to move and locate on the Sean Romeo Block 49/25 for Well Plug and abandonment activities for approx 90 days

The Prospector 1 is a Non-Production Installation (MODU jack-up) which will be cantilevered over the Sean Romeo well bay.

It will be on location approximately 90 days during which time ONE-Dyas will be utilising the Prospector 1 for accommodation and completing plugging & abandoning of the wells on the SEAN Romeo platform. It will be towed to the location by three tugs, pulled into final position on anchors and jacked up (air gapped) as per the rig move and positioning program. A dedicated Emergency Response & Rescue Vessel (ERRV) will guard the 500 m safety zone. The Prospector 1 is equipped with navigational aids and lighting, AIS, radio and 24/7 manned radio room. To prevent confusion it is proposed that Romeo Navigation aids will be turned off, and Prospector 1 navigation aids will be used.  

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Array Cable Installation - Moray Offshore Windfarm (West) Limited

This notice to mariners is to inform that Moray Offshore Windfarm (West) Limited (Moray West) will be carrying out array cable installation and ROV survey operations from the vessel Seaway Aimery supported by the Olympic Orion at the Moray West Offshore Wind Farm site.

Scope of work includes installation of subsea power cables into the Wind Turbine Generator foundations and Offshore Substation foundations. Followed by lay subsea power cables on the seabed (a separate NtM will be issued for cable burial operations in the future) Also an ROV survey of the array cable routes, and monitoring of the operation will be conducted.

The work will be performed by the Seaway Aimery supported by the Olympic Orion.

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Rig - Noble Resolve

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Light Well Intervention Vessel Project - Bruce Field

Serica Energy (UK) Ltd (Serica) are looking to perform a well intervention campaign on the Bruce phase two Western Area Development (WAD) and Keith gas condensate fields. It is planned that using the Helix Well Enhancer Light Well Intervention Vessel (LWIV) will perform well intervention services at wells Bruce WAD 9/08a-B6(M5), (possibly) 9/08aB3Z(M4) and Keith 9/8a-K01(K1) (formerly 9/8a14).

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Offshore Site Investigation - Awel y Môr Proposed Wind Farm

A Geotechnical Site Investigation of the proposed Awel y Môr Offshore Wind Farm is due to be conducted off the North Wales coast between 11th November 2023 and May 2024.

The jack-up barge Seafox 7 is due to start geotechnical site investigations on the 11th November 2023 and to continue the survey until May 2024.  This estimate includes delays likely to be caused by bad weather. During the survey, Seafox 7 will drill 60 boreholes at discrete locations in the project site.  The vessel will operate for 24 hours per day during the survey.  The survey area is illustrated in the Notice to Mariners and bounded by the coordinates below:-

  • NE Marker: 53° 29.460’N 003° 35.220’W
  • SE Marker: 53° 29.532’N 003° 44.760’W
  • SW Marker: 53° 26.700’N  003° 51.600’W
  • NW Marker: 53° 29.280’N 003° 51.600’W

Seafox 7 will be supported by the vessels Elisa and Fairplay 32 in its daily operations, and these vessels will tow the barge between sampling locations.  The tugs will standby at anchor on the project site, and will also be transiting between the site and nearby ports. The vessel MCS Boreas will be assisting the Seafox 7 with crew transfer operations to shore on a twice-weekly basis.

 

Vessel details

Seafox 7 is a jack-up barge with a red hull and white superstructure.  It measures 55.5m long with a beam of 32.2m.  Details for this barge and its support vessels are provided below:-

  • Seafox 7: drilling vessel | MMSI 235065812 | Call sign 2BGC6
  • Elisa: Support vessel / tug | MMSI 236745000 | Call sign PBZP
  • Fairplay 32: Support vessel / tug | MMSI 210447000 | Call sign 5BAM6
  • MCS Boreas: Crew Transfer Vessel | MMSI 235096501 | Call sign 2GDR8

Operations will be conducted on a 24 hour basis.  A continuous listening watch will be conducted on VHF Channel 16.

 

Other vessels are requested to keep their distance, maintaining at least a 500m distance.

 

Full details of all of the vessels can be found in the Notice to Mariners.

 

About the proposed windfarm

The Awel y Môr Offshore Wind Farm would be built around six miles off the North Wales coast, to the west of the existing Gwynt y Môr windfarm.  Awel y Môr would be connected to the National Grid by an export cable coming ashore between Rhyl and Prestatyn.  The proposed windfarm would include up to 50 wind turbines.  It could generate enough power for up to half a million homes, and it will be the largest renewable energy investment in Wales in this decade. Full project details and maps of the windfarm location are available at the project website awelymor.cymru.

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Geophysical Survey - Thistle Wind Partners proposed (E3) Offshore Wind Farm

Thistle Wind Partners are developing the proposed Bowdun (E3) Offshore Wind Farm. Please be advised that G-Tec, on behalf of Thistle Wind Partners (TWP), is undertaking a Geophysical Survey of the proposed Bowdun (E3) Offshore Wind Farm Array Area. The purpose of this Notice to Mariners (NtM) is to outline the working area for the survey vessel, as well as the scope of work. The survey will utilise the vessel Karina.

G-Tec will be undertaking a geophysical survey over Bowdun (E3) Area Area utilising towed sensors. During the survey the vessel will be operating at approximately 4 knots with equipment being towed at a distance of up to 300m astern of the vessel.

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Seawatch Wind Lidar Buoys - Caledonia Offshore Wind Farm

Deployment of two (2) Floating Seawatch Wind LiDAR buoys in the Moray Firth for the acquisition of Wind and Metocean Data for a period of 24 months.

*SWLB-075 currently unlit (04/03/2024) - AIS remains active*

On the 3rd of June 2023, Fugro deployed two (2) Floating Seawatch LiDAR buoys within the Caledonia Offshore Wind Farm site for the acquisition of Wind and Metocean Data. The two buoys are intended to remain in-situ for a minimum period of 24 months.

 

Mariners are advised to maintain a 500 m clearance from the deployed equipment.  Operations were completed by the Fishing vessel ‘MS Elisabeth’.

 

The buoys will remain in situ until June 2025, the exact removal date will depend on weather and be determined at a later stage. A separate NtM will be issued for the removal activity.

 

Details on the Seawatch Wind LiDAR (3.0) Buoys including navigational safety features and mooring layout design are provided in the attached NtM (V8).

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Exposed Cable - Shefa-2 (Segment 7)

Shefa-2 Segment 7 cable break has been repaired and the Post Repair Inspection and Burial (PRIB) operation has been completed. Hence, minor sections of wet stored cable is sensitive to any external impacts and constitutes a snagging risk for anchoring, fishing gear or other equipment with seabed intervention.

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Exposed Cable - Shefa-2 (Segment 7)

Shefa-2 Segment 7 cable breaks occurred 14 October 2022 and 11 May 2023. The Post Repair Inspection revealed that, due to rocky seabed, cable burial is not possible and other cable protection measures are being evaluated. Hence, a section of 2600m cable is exposed to seabed and poses a high risk to fishing activity. Please pay attention to this section of wet stored cable which is sensitive to any external impacts and constitutes a snagging risk for fishing, anchoring or other seabed equipment.

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Open WHPS roof panels at the North West Bell field

The roof panels on the Wellhead Protection Structure (WHPS) at the North West Bell location are currently in an open position. The WHPS is within the existing 500m zone.

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Subsea Well Plugging & Abandonment - Banff, Kyle, Strathspey, Lyell, Ninian and Columba E Fields

Vessel-based subsea well plugging and abandonment, including the use of explosives for wellhead conductor severance, and recovery of wellheads from the seabed. Activities are to be carried out across the Banff, Kyle, Strathspey, Lyell, Ninian and Columba E fields.

CSV / AHV Island Valiant (c/s JWMY) is planned to mobilise on 26th March for a 65-day campaign.

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Subsea Decommissioning - Banff & Kyle

DeepOcean vessels will be completing subsea decommissioning activities, including rock placement, at the Banff and Kyle fields, adjacent to the decommissioned Curlew field and adjacent to the CATS T5 location. Scopes are to be carried out mainly inside existing subsea 500m Safety Zones, but some scopes will be completed out-with these zones.

CSV Normand Jarstein is due to mobilise on 28th March for a 38-day campaign of decommissioning work.

CSV Dina Star is due to mobilise on 8th May for a 23-day campaign

CSV Normand Jarstein is due to mobilise on 16th July for a 61-day campaign

CSV Edda Freya is due to mobilise on 25th September for a 5-day campaign

FPV Stornes is due to mobilise for subsea rock installation mid-April for a 14-day campaign, and again in October for a 14-day campaign.

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Well Plug & Abandon activities - Juliet/ Minke & Orca

Carry out DSV barrier testing and frame removal at Juliet and Minke locations in March 2024. Carry out DSV dredging activities at Orca Well in March 2024. Carry out Rig P&A activities at Juliet/ Minke & Orca Wells from April through to September 2024.

DSV Boka Polaris to arrive at the Juliet and Minke locations to prove barriers prior to rig arrival.

WHPS framework to be cut off by DSV at the Juliet and Minke locations.

Open hole dredging activities to be carried out at Orca Well in preparation for rig arrival.

 

Drill Rig "Well Safe Protector" to carry out P&A activities at Julient/ Minke and Orca locations.

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Safety Zone position: "Clair Tee, Magnus EOR Development" (CORRECTION)

Please note that FishSAFE information for plotter systems and FishSAFE Alarm Units for the "Clair Tee, Magnus EOR Development" Safety Zone IS CORRECT. A notice from Wednesday 1 November 2023 stating otherwise, has been found to be incorrect. To confirm, the information on FishSAFE is correct and the centre of the safety zone is as below:

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Freespan - 4" Meg Bacton - Leman AP

High Freespan. Max 13m long freespan with height exceeding 1.6m

Please check your Fishsafe plotter data

See detailed map on our bulletin website
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High pipeline freespan - 4" Meg Bacton

High pipeline freespan maximum 50m long freespan with excessive height of 1.8m

Please check your Fishsafe plotter data

See detailed map on our bulletin website
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Rig Move - V120 to Judy Riser Platform

Harbour Energy plan to move the V120 Jack-Up drilling rig from the Talbot open water location to the Judy Riser Platform location in block 30/07a to perform a drilling campaign on three wells. The Judy installations have a dedicated Emergency Response and Rescue Vessel (ERRV) on location monitoring the surrounding area.

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Metocean buoy at Bellorck Offshore Wind Farm site

Please be advised that EOLOS has successfully relocated the Bellrock Floating LiDAR System buoy FLIDAR E25 on 24th February 2024. The new coordinates are shown in Table 1 in the attached. The Bellrock FLS200 E25 will remain in the Bellrock Offshore Wind Farm site for an approximate period of 24 months (i.e. until April 2025).

Please be advised that EOLOS has successfully relocated the Bellrock Floating LiDAR System buoy FLIDAR E25 on 24th February 2024. The new coordinates are shown in Table 1 in the attached.

 

The Bellrock FLIDAR E25 was initially deployed within the Bellorck Offshore Wind Farm site in April 2023, for acquisition of Wind and Metocean Data. A description of the device is presented in Section 2 in the attached.

 

The works completed on the 24th February 2024, with the Voe Earl vessel, consisted of recovering the Bellrock FLIDAR E25 device from its original location, and redeploying it at the new location (See Table 1 and Figure 1 in the attached).

 

The Bellrock FLS200 E25 will remain in the Bellrock Offshore Wind Farm site for an approximate period of 24 months (i.e. until April 2025).

See detailed map on our bulletin website
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Inspection and Survey - Liverpool Bay Asset

To support the jack up operations there is required to be a geophysical survey and an environmental survey at the P&A locations prior to the jack up performing the operations. Geophysical surveys were performed in 2024 covering all locations. Additional surveys are required this year for data validity and are indicated below.

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Diving work on 52/5a Platform, all SS wells in the Hewett Field

DSV Topaz will be conducting diving and ROV operations at the Hewett field. Activities will be diving at installation 52/5A and all 7 SS wells. the duration of the project is 30-60 days.

Diving and ROV activities.

Onboard ENI Rep; ryan.phipps@external.eni.com 

See detailed map on our bulletin website
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Rig Move - Ensco 92 to Crossans

Harbour Energy plan to move the Ensco 92 Jack-up drilling rig from the Millom West platform location to the Crossans field location to perform abandonment operations on the 110/02b-10 subsea well. Throughout the well abandonment operations there will be a dedicated Emergency Response and Rescue Vessel (EERV) on location monitoring the surrounding area.

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Research Buoy Recovery - Morlais Demonstration Zone.

Notification of the recovery of scientific research buoy in the Morlais Demonstration Zone to the Port of Holyhead.

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Rig - COSL Promoter

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Deepsea Atlantic

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Shelf Drilling Winner (ex Noble Sam Turner)

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Well Safe Protector

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Ocean Endeavor Anchor Spread - Penguins - Pan NW

The Ocean Endeavor will be drilling a development well at Pan NW at the Penguins field, Northern North Sea. This will have 12-line mooring spread, extending out up to 1.5km from rig positioning. The activity will last ~3months from March through to June.

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Rig - 590021

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Valve De-isolation - Pierce Field

Vessel : Seven Kestrel will be at Pierce doing valve De-isolation of the field for 3 days then will move to Penguins (which is captured in another Bulletin), then will be located at HOWE for Pipeline Inspections for 3 days.

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Exposed and Free Span - Greater Gabbard Offshore Wind Farm

Results of the Greater Gabbard OFTO export cable survey. The chart lists the changes to the exposures on the three export cables, on the inshore section between KP 3 and KP 5 with a free span remaining around KP 4. Between KP 36 and KP 38 there are some exposed sections as the cables enter the site. In addition, although listed as exposures on the chart, there are areas of shallow burial at KP10 and a cable exposure on the interconnector cable within the site.

Please find attached a chart showing the results of the Greater Gabbard OFTO export cable survey. The chart lists the changes to the exposures on the three export cables, on the inshore section between KP 3 and KP 5 with a free span remaining around KP 4. Between KP 36 and KP 38 there are some exposed sections as the cables enter the site. In addition, although listed as exposures on the chart, there are areas of shallow burial at KP10 and a cable exposure on the interconnector cable within the site.

 

The exposed/shallow burial areas are shown as the coloured dots on the cable route highlighted in a black box.  Equitix (Greater Gabbard OFTO) have asked that all Fishermen operate with caution when fishing anywhere on the cable route and particularly the areas that are shallow buried around KP10.’

 

Coordinates of exposed/shallow burial areas are shown on the attached chart.

 

The OFTO is updating its risk assessments to determine the extent of remedial measures that may be required. Equitix intend to provide an update on remediation after the risk assessment exercise is complete.’

See detailed map on our bulletin website
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Animal tracking acoustic receivers - Cornwall South Coast

The University of Exeter with the Cornwall Inshore Fisheries & Conservation Authority have deployed animal tracking acoustic receivers along the south coast of Cornwall. The receivers are low profile and consist of a yellow sub-surface float with an integrated electronics package. The unit has an attached rope drum and floats just above the seabed. Each receiver has a ground line running approx. 100m from the unit. There are no surface markers associated with these devices.

The University of Exeter have deployed acoustic receivers along the ~50m depth contour of the south Cornwall coast. These receivers collect information on the movement and residency of electronically tagged Atlantic bluefin tuna. Other receiver networks have been deployed across the English and French Channel, including the Isles of Scilly, to detect these highly mobile species and other tagged fish species as part of the FISH-INTEL project.

 

The receivers are low profile (75cm height, 45cm width and <0.75sqm) and will be serviced several times each year. The receivers are retrieved by triggering (from the surface) the release of a recovery line from the unit. Receivers are moored to the seabed using rail chair clump weights. There is no permanent tether to the surface. Each receiver has a 100m ground line to provide a retrieval backup.

 

If a receiver is accidently recovered please retain and contact the University of Exeter (using point of contact).

See detailed map on our bulletin website
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Decommissioning/IRM Activities 2024 - Central North Sea & Southern North Sea

The DSV Boka Da Vinci will be completing decommissioning activities at SNS, Murdoch/CMS III, Johnston , Balmoral and MacCulloch, and IRM activities at Callanish. The Boka Polaris will be undertaking IRM work at NW Seymour

The DSV Boka Da Vinci is due to mobilise in Sunderland on 1st March to undertake a 220 day offshore campaign to execute the IRM and Central North Sea and Southern North Sea Decommissioning Scopes. The vessel will be working at SNS, Johnston, Murdoch, Balmoral, and MacCulloch 500m safety zones. Upon completion of the offshore campaign, the vessel will demobilise in Sunderland.

 

The Boka Polaris will mobilise circa 26th March for a 7 day scope at NW Seymour.

See detailed map on our bulletin website
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Subsea Obstruction - North East of the Southwark platform

Scour Conditions have created a protruding section of the export pipeline 100 metres North East of the Southwark platform

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Rig - Maersk Innovator

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Metocean Buoys - Victory Development Area

1x metocean buoy and 1x metocean buoy mooring floating in the water column at the Victory development area. Submerged buoy is 18 m above seabed. Note that surface buoy mooring can move up to 150 m around deployment location. Note that moorings are not visible on the surface.

Surface buoy mooring (Western most):

WGS84: Lat: 60° 59' 11.52"N, Long: 01° 54' 06.96"W

Mooring: 3000 kg steel balast with chain

Buoy diameter: (not connected)

 

Submerged buoy (Eastern most)

WGS84: Lat: 60° 59.196' N, Long: 01° 53.709' W

Water Depth: 145.9 m

Mooring: 500 kg steel balast with chain

Buoy diameter: 1 m

See detailed map on our bulletin website
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Rig - Paul B Loyd Junior

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Noble Reacher (ex Maersk)

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Noble Resolute (ex Maersk Resolute)

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Project Marine Survey Geotechnical Operations - Eastern Green Link 3

Mariners are advised that a marine geotechnical survey is planned for the Eastern Green Link 3 (EGL3) project. The marine survey activities for EGL 3 are planned to commence late-November 2023 and are expected to complete around the end of May 2024.

Eastern Green Link 3 is a HVDC electricity transmission interconnector between Scotland and England, a joint venture between National Grid and Scottish & Southern Electricity Transmission (SSEN).

 

The EGL 3 project will play a vital role in achieving the UK and Scottish governments net zero targets and significantly increase the UK’s capacity for clean, green renewable power.

 

The EGL 3 marine geotechnical survey works consist of shallow cone penetration tests (CPTs) and vibrocores (VCs) to a maximum of 6 m below seabed at approximate 1 km intervals.

 

The area of work, pertaining to this Notice to Mariners (NtM) for EGL 3, is illustrated in Figure 1, with the survey vessel contact details for the project found in Table 1. Note, centreline co-ordinates are provided on the associated Kingfisher notice.

 

Contact details for the project Fisheries Liaison Officers are detailed below.

 

The geotechnical survey works are being carried out by Next Geosolutions using the following vessel:

 

Ievoli Grey (IMO 9608788; MMSI 247325100; Call Sign IBCM).

 

Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 550m (0.3 nautical miles) from the areas identified. During these works the vessel will have restricted manoeuvrability as it completes its work scope.

 

VHF CH 16 will be monitored at all times and will be used to contact the coastguard in the event of an emergency.

See detailed map on our bulletin website
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Topside Removal - Amethyst A1D

ERDA Jackup Barge will come alongside Amethyst A1D to remove the topside. The Jacket will be retained.

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Wellhead structure on location which could present a hazard to other sea users

The wellhead structure extending above the seabed is a snagging hazard. Note, details are included in FishSAFE and guard vessel will vacate location on 16th February.

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Rig - Seafox 2

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Swift 10

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Metocean Buoy Deployments - Ossian Offshore Wind Farm

Partrac Ltd. deployed FLS200 Floating LiDAR buoys at two sites within the Ossian Floating Offshore Wind Farm off the East coast of Scotland in August 2022. Partrac is planning to redeploy the LiDAR Buoy at Site 1, and recover the LiDAR Buoy at Site 3 to Montrose for maintenance, from 14/02/2024. The works are estimated to be carried out over two days, weather permitting. The vessel to be used for the works is the Voe Earl with call sign 2FEP6, MMSI Number 235090599 and IMO 9639983.

FLOATING LIDAR BUOY The floating LiDAR buoys deployed at sites 1 and 3 record meteorological data and are anchored to the seabed by means of a mooring chain and a ground weight. The buoy has dimensions of 4m x 4m, and when deployed the tallest mast on the buoy sits approx. 4m above the water line. The lantern has a flash sequence Fl (5) Y 20s. Please maintain a 500m exclusion around each buoy.

See detailed map on our bulletin website
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Rig - Deepsea Yantai

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig Move - COSL Pioneer

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Well Intervention Project - West Sole Charlie

The Petrodec HAEVA will be positioned at the West Sole Charlie (WSC) installation for a Well Intervention Project.

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Rig - Valaris Gorilla VI

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Askeladden

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Well Operations - Stena Don Arran Field

Notification of rig operations at Arran field with the Stena Don

Note:

The anchors anchors are connected to the rig via mooring lines.

The anchors and morring lines extend outwith the rig 500m zone.

See detailed map on our bulletin website
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Navigational Hazard due to cable exposure - AEC-1

AEC-1 Cable System break has been repaired but the Post Repair Inspection and Burial (PRIB) operation has not been completed. Hence, a section of approx. 1.5km of cable is sensitive to any external impacts and constitutes a snagging risk for anchoring, fishing gear or other equipment with seabed intervention. Please keep a distance of 500m.

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New Wells on Seabed - Captain Field Drill Centre D

Three new wells have been installed at the Captain Field, Drill Centre D. The well (i.e. xmas tree) height above the seabed is approximately 6m. Mud mattress geometry is approximately 6m x 3m x 0.15m (height).

Drawing 'CP1913-7000-D101' details concrete mattress. 

Drawing 'CER-PGEN-TEC-LAY-TEC-0000-00004-00_K02_1' details 3 new wells and their coordinates. 

See detailed map on our bulletin website
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Wave data buoy - East of Whalsay

Deployment of an AquaNode Wave Buoy, moored with a block on the seabed with a mooring swing radius of <200m about the location given. Colour: Bright Yellow Markings: High-visibility reflective tape, marked 'SURVEY' Dimensions: 75cm Ø x 39cm.

*25 Jan 2024 position and date updated to reflect actual deployment*

See detailed map on our bulletin website
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Routine service (recovery and deployment) of Buoys - North Sea

Routine service (recovery and deployment) of SmartBuoys, Noise Lander, WaveRider; deployment of Marine Litter sampling gear; collection of water and plankton samples at fixed stations as well as underway while steaming

3.5-day survey to exchange 2 SmartBuoys, 1 Wave Rider, and 2 Noise Landers, various catamaran trawls and microplastic sampling using a deployable pump, and to collect water and zooplankton samples for eutrophication monitoring and calibration exercises whilst on transit in the North Sea.

SmartBuoy and Noise Lander aims (3 days):

1.    Service Noise Lander at Warp (GIA06H) 0.5 days

2.    Recover Noise Lander at Dowsing (GIA06H) 0.5 days

3.    Service SmartBuoy at Warp (GIA03D) 1 day

4.    Service SmartBuoy at West Gabbard (GIA03D) 1 day

5.    Service Wave Rider at West Gabbard (GIA03D) 1 day Water Sampling aims (continuous):

6.    Service the FerryBox flowthrough system

7.    Continuous flow/underway water sampling as required on various transects

8.    CTD Rosette water sampling as required on various transects

9.    Secchi disk deployment and Forel Ule sampling as required on various transects

10.    Collection of zooplankton sample at West Gabbard

11.    Collection of zooplankton sample Warp

12.    Collection of zooplankton sample East of Warp  Microplastic Aims (0.5 days):

13.    Catamaran trawls on various transects

14.    Microplastic pump deployments on various transects

15.    Continuous CALPs flow through sampling as required on various transects

See detailed map on our bulletin website
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ADCP deployment - Balmaqueen

Deploy an ADCP in a seabed frame for 100 days. The frame is connected to a ground line to an anchored surface marker buoy. Deploy an AquaNode wave rider buoy along side ADCP mooring for 100 days

It is intended to gather the 90 days hydrographic data to support the viability of the site for Aquaculture and to assist the design of moorings feed barge etc.. I have attached a chart extract showing the location of the meter(location).. This seabed mounted meter will be marked with an unlit surface marker buoy. The meter we intend to use will be a Teledyne Sentinel V100 which operates at 300kHz which is outside the hearing range of any cetaceans within the area and we do not feel this deployment will have any significant effects on the local environment.

We have also been asked to deploy a wave buoy(see attached) for the duration of the ADCP deployment and it is planned to deploy it close to the ADCP deployment location. Both pieces of equipment will be deployed on “J “ moorings similar to what we have done before.  

See detailed map on our bulletin website
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Pipeline In Line Inspection Operations - LOGGS

Subsea 7 shall be utilising the DSV Seven Falcon to support pipeline inspection operations from open water locations in the SNS, Block 49. Pipeline "In Line Inspection" works are being performed to support potential re-use for future Carbon Capture and Storage operations.

One site shall be worked on PL0454 - LOGGS Platform to Theddlethorpe, 36" Disused Gas Pipeline.

 

The second site shall be in the vicinity of the Decommissioned (Removed) Viking AR platform on the disused PL0027 - Viking AR to Theddlethorpe Gas Terminal 28" Gas pipeline.

 

During the subsea operations the associated pipeline deburrial and cutting operations may present a fishing snag hazard, for this reason the operation shall be supported by a Guard Vessel - Details TBC.  Prior field departure exposed pipeline ends shall be buried with graded rock to remove snag hazards.

 

The DSV shall be restricted in her ability to manoevre throughout the planned operations and shall display the appropriate day and night signals. The Seven Falcon shall maintain a continuous listening watch on VHF CH.16.   

 

Offshore operations are anticipated to be ongoing for ~30 days. 

 

All vessels are requested to maintain a wide berth and maintain at least ~1nm clearance from the DSV operations and a wide berth from the pipline cut locations.

See detailed map on our bulletin website
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Subsea Decommissioning - Durango

The Durango subsea well and associated infrastructure will be decommissioned between July and September 2024. The HAEVA Jackup Barge will be on location to facilitate the decommissioning activity.

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Rampion Offshore Wind Farm Notice To Mariners: Risk of cable exposure within the Rampion Wind Farm

Following the most recent subsea survey carried out in August 2023, updated information of inter-array cable exposures are listed and illustrated below. Analysis of survey data at the wind farm indicates the locations of exposures of sections of inter-array cables are subject to change resulting from dynamic movements of the seabed but are primarily focused within the South-South East of the wind farm area.

Following the most recent subsea survey carried out in August 2023, updated information of inter-array cable exposures are listed and illustrated below. Analysis of survey data at the wind farm indicates the locations of exposures of sections of inter-array cables are subject to change resulting from dynamic movements of the seabed but are primarily focused within the South-South East of the wind farm area.

 

Mariners are reminded that further safety information related to array cable exposures can be found in “The Risks of Fishing Near Cables and Renewable Energy Structures”, published on the KIS-ORCA website https://kis-orca.org/safety/the-risks-of-fishing-near-cables-renewable-energy-structures/. General safety information can be found here: https://www.seafish.org/article/kingfisher-bulletins.. All mariners are requested to make themselves aware of their obligations for conducting activities over buried and protected cables under International and UK Cable (Subsea) Protection Legislation.

See detailed map on our bulletin website
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Risk of cable exposure within the Galloper Offshore Windfarm

Galloper Windfarm, RWE - NTM: GWFL-O&M 03-2020 v2 Risk of cable exposure within the Galloper Windfarm

Please be advised that the subsea survey carried out in 2020, identified seven cable routes with 10 exposures in total. The below table provides the locations of the identified exposures.

 

As cable exposure is a known risk at Galloper and across the offshore wind industry, we would remind Mariners of the safety information found on the KIS-ORCA website ‘The risks of fishing near cables and renewable energy structures. To avoid crossing cables when towing equipment follow the cable corridors- locations of the cables can be found on the Galloper awareness charts via KIS-ORCA.

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Marine Mammal Monitoring Passive Acoustic Monitoring Deployment - East Anglia Offshore Windfarm

Seiche limited has deployed 12 Passive Acoustic Monitoring (PAM) Stations on the seabed in the East Anglia Offshore Windfarm Area on the 16th of May 2023. The PAM stations will remain on the seabed till the 31st of October 2027. The PAM stations have 12 m height above the seabed, they weigh 600 kg and their location will not be marked by a surface buoy. All marine traffic is advised to maintain 500 m exclusion zone around these PAM locations for their safety.

East Anglia THREE Offshore Windfarm Marine Mammal Monitoring - Passive Acoustic Monitoring Baseline Deployment

 

Seiche Limited

Passive Acoustic Monitoring at the East Anglia Three Offshore Windfarm

NTM:  PAM-EA3- 007                                                                                   Date of issue: 09 January 2024

 

Dear Owners, Ships Agents, Masters, Pilots and Fishermen,

 

Please, be advised that Seiche Limited will perform a Service on the 12 Passive Acoustic Monitoring (PAM) Stations that had been deployed on the seabed in and at locations around the East Anglia THREE Offshore Windfarm Area, starting from the 27th of January 2024. The service is expected to be completed on the 10th of February 2024.

 

Seiche will utilise the Reykjanes vessel for the deployment.

Reykjanes

Scope: PAM stations deployment

Vessel: Reykjanes

LOA: 40.16 m

Call sign: OVSI2

IMO: 7392311

MMSI: 219329000

Phone: +45 (0) 8213 6973

Mobile: +45 (0) 2614 9844

 

The PAM stations will remain on the seabed until approximately the 31st of October 2027.  The PAM stations have 12 m height above the seabed, they weigh 600 kg and their location will not be marked by a surface buoy.

All marine traffic is advised to maintain 500 m safety zone around the Reykjanes or any other vessel at these locations during deployment or servicing for their safety.

 

There is an exclusion zone of 250 m around the PAM Stations. All marine traffic is advised to abide by the 250 m safety zone around the PAM Stations all the time for their safety.

 

/Locations of the PAM stations in WGS-84 coordinates:

Date Deployed

Location Number

Latitude

Longitude

 

For general enquiries, please, contact via e-mail:

environmental@seiche.com

https://www.seiche.com/

Tel: +44 (0) 1409 404050

 

 

Fisheries Liaison Officer (FLO):

Name: Jonathan Keer // Freya Sandison

Email: jonathan@brownmay.com // molly.jones@brownmay.com

Telephone: +44 (0) 7850 604851 //

+44 (0) 7857 500609

16 May 23

EA3_01

52°

39.757'

N

002°

50.892'

E

16 May 23

EA3_02

52°

43.944'

N

002°

56.888'

E

16 May 23

EA3_03

52°

43.323'

N

002°

48.350'

E

16 May 23

EA3_04

52°

39.478'

N

002°

43.975'

E

16 May 23

EA3_05

52°

33.833'

N

002°

43.954'

E

16 May 23

EA3_06

52°

29.218'

N

002°

33.556'

E

16 May 23

EA3_07

52°

23.948'

N

002°

27.678'

E

16 May 23

EA3_08

52°

19.731'

N

002°

21.606'

E

16 May 23

EA3_09

52°

37.079'

N

002°

50.340'

E

16 May 23

EA3_10

52°

31.734'

N

002°

49.630'

E

16 May 23

EA3_11

52°

24.449'

N

002°

45.480'

E

16 May 23

EA3_12

52°

17.573'

N

002°

52.304'

E

 

This notification supersedes all previous notifications issued in relation to this activity.

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FPOD seabed moorings

Sub-sea moorings deployed on (and to approximately 6 m above) the seabed at seven locations with the below 100m x 100m boxes. Each location will have acoustic monitoring devices attached between two clump weights spaced 50m apart. All equipment will be subsurface with no marker buoy, and will protrude approximately 6m vertically from the seabed. All equipment will be labelled with relevant contact details. Deployments will be conducted from the research vessel Princess Royal.

ABPmer are due to conduct a series of survey equipment deployments along the Northumberland coast. This work is being conducted for Natural England under MMO license ref: L/2023/00399. Vessel will display RAM throughout operations and will be contactable on VHF Channel 16 and other appropriate working channels.

All equipment will remain in place for 18 months following deployment w/c 29 January 2024, with interim service visit at approximately 4 month intervals. All vessels are requested to pass the relevant locations above by a minimum of 100m throughout the duration of the equipment in place.

Further notice will be provided when all equipment is removed from each location.

See detailed map on our bulletin website
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Valaris V121 over Shearwater Alpha

Valaris V121 MODU jack-up rig will be situated over Shearwater Alpha platform. Duration Valaris V121 MODU will be on location estimation 730 days.

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Snagging Risk - Seabed Obstacle Anchor 6-7 Tonnes - Clair Field

An obstacle – confirmed to be an anchor, some netting and wire, believed to be around 6-7 Tonnes in weight – has been reported on the seabed at the below approximate location. The obstacle represents a snagging hazard, and the general area should be avoided.

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Surface Laid Cable - The Whitley Bay Stub Route (2)

The installation of the Havhingsten fibre optic telecommunication Whitley Bay Stub Route has been completed. Due to challenging soil conditions and rocky seabed, there are sections of surface laid cable and areas with shallow burial. No further operations to bury this section of cable are planned due to the presence of rock. The cable is protected by the armoured cable type and from the BMH up to kilometre point (KP) 0.474 the cable is additionally protected by Articulated Pipe.

Please be advised that installation of the Havhingsten fibre optic telecommunication Whitley Bay Stub Route has been completed.

 

The supplier of the Havhingsten cable is Alcatel Submarine Networks (ASN). Intertek are the environmental and permitting consultants.

 

The Whitley Bay Stub Route has been installed between the Beach Man Hole (BMH) and the territorial sea limit but it will not yet be connected to the telecommunication network. This cable is to provide infrastructure for the network to expand relatively easily when demand is required within the next 10 - 15 years.

 

Due to challenging soil conditions and rocky seabed, there are sections of surface laid cable and areas with shallow burial (less than 0.20m burial depth), coordinates can be found below. No further operations to bury these sections of cable are planned due to the challenging soil conditions. The cable is protected by the armoured cable type and from the BMH up to kilometre point (KP) 0.474 the cable is additionally protected by Articulated Pipe.

 

Coordinates for the surface laid cable and shallow burial areas are provided in the attached Notice to Mariners.

 

Post-Lay Inspection & Burial (PLIB) by jetting for the section of surface laid cable close to the territorial sea limit was completed on the 1 November 2022.

See detailed map on our bulletin website
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Rig - Askepott

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - West Phoenix

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Passive Acoustic Monitoring Device - Spiorad na Mara Offshore Wind Farm

The Scottish Association for Marine Science (SAMS) using the Seatrek vessel Lochlann has successfully deployed a Passive Acoustic Monitoring Device (PAM) on behalf of Spiorad na Mara Ltd. The PAM will be deployed on site over a period of 12 months within the Spiorad na Mara offshore wind farm site.

Positions of equipment can be seen in Figure and Table 1 of attached. 

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Metocean Equipment - Spiorad na Mara

Spiorad na Mara Ltd deployed an array of metocean equipment, including one floating LiDAR (FLIDAR) buoy, over a period of 24 months, and two Datawell Waverider buoys and one Seabed mooring for 12 months within the Spiorad na Mara offshore wind farm site. An additional seabed mooring has been deployed on site. The original seabed mooring remains without a surface buoy attached. there is approximately 100m of rope attached. Please keep clear.

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Unmanned Surface Vessel - Operation out of Grimsby and Scarborough

Operations of remotely piloted Uncrewed Surface Vessels (USVs) are planned out of Scarborough and Grimsby commencing mid-late January, and continuing throughout February, March and April 2024. The vessels will be engaged in geophysical survey activities associated in the North Sea.

Operations will take place subject to weather and other operational factors from 22nd January for 13 weeks. Up to 6 USVs are expected to be operational at one time.

 

A support vessel will escort the USVs from the active ports to clear water.

 

Although the vessel is uncrewed, it is crewed throughout the 24 hour operation, piloted remotely using 360 degree cameras and other navigational aids.

 

Figure 1 in the attached document indicates the operational area. The survey area boundary is indicated in Table 1 also. In addition to the survey area, the USVs will transit from one of the named ports above to site.

 

Fisheries Liaison for this survey will be co-ordinated by Natural Power. All commercial fishery queries, should be directed to Peter Berney or Hollie Maven; Mobile T: 07391402387  / Email: Ossian.FLO@naturalpower.com.

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Monopile / Transition Piece Offshore Installation - Moray Offshore Windfarm (West) Limited

This notice to mariners is to inform that Moray Offshore Windfarm (West) Limited (“Moray West”) will be commencing with the installation of Transition Pieces (TP) at the Moray West Offshore Wind Farm (Windfarm Marine License MS-00009774) from around 23 January 2024. The work comprises of the installation of 60x TPs on the already installed Monopiles. The TPs will be installed by the Jack up vessel Apollo.

The scope of TP installation with Apollo comprises of the installation of 60x WTG TPs and the scope of works for the MP installation with Orion comprises of the installation of approx. 30x MPs.

 

The TP installation will be carried out with the dynamically positioned installation Jack Up Vessel (JUV) Apollo. The MP installation will be carried out by the dynamically positioned installation vessel Orion in addition to the Bokalift 2.

 

 

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WTG Installation Campaign - Dogger Bank A

The Jack-up WTG Installation Vessel, Voltaire, will install wind turbine generators (WTG) within the Dogger Bank A construction area.

The works will commence on the 05th of July 2023, continuing until approximately Q2 2024.  The works will be continuous, 24 hours a day.  A chart of the DBA construction area boundary coordinates and a table of WTG location coordinates is provided below. A running list of the completed WTG installations and the next locations to be installed is presented in the Weekly Notice of Operations.

 

During operations, the Voltaire will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. 

 

During operations, a Statutory Safety zone of 500m radius will be in place around the Voltaire during the installation of WTGs.  The safety zone will be monitored by a guard vessel. The primary response will be to warn passing traffic of the ongoing works and any active safety zones, and to alert any vessels where an infringement may occur or has occurred. 

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Rig - Valaris 72

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Well-Safe Guardian

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Valaris Norway LBA

Valaris Norway will be on site from the 1st Jan in Liverpool Bay, 1400m exclusion zone. P&A of SS well 110-15 6z -  1400m exclusion zone in force 

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XOCEAN Uncrewed Survey Vessel Operations

Annual NTM for Carlingford Lough and Western Irish Sea

Activity:  

XOCEAN Ltd will be operating Uncrewed Survey Vessels (USVs) in Carlingford Lough and western Irish Sea between Ardglass and Clogher Head for the purpose of vessel and system testing. The USVs will normally be mobilised from Carlingford Marina.   

 

Operational Schedule: 

  • 24-hour operations are planned from 1st January 2024 until 31st December 2024 

The USV’s send real time images and situational awareness data over 4G/Satellite to a team of operators keeping watch and controlling the vessel remotely 24/7. 

 

Selected USV’s will be fitted with towed survey equipment. The tow can extend up to 200m astern of the USV. 

 

Safety Precautions:  

The USVs are equipped with the following to make it conspicuous to other marine traffic and to allow communications: 

  • AIS  

  • Navigation Lights & Sounds 

  • Active Radar Reflector 

  • Superstructure Painted Yellow 

  • VHF Radio 

 

XOcean Support Vessel: 

When operating within Carlingford Lough, the USVs will be accompanied by a support vessel.  

This support vessel will monitor VHF Ch 12 & 16 and can be contacted with call sign “XOCEAN Support Boat”. 

 

Community Advisory: 

Seafarers are requested not to deliberately approach the USVs whilst at sea and to manoeuvre as required by the International Rules for the Prevention of Collisions at Sea (IRPCS).  The USVs are defined as ‘Power Driven Vessels’ under the IRPCS. 

 

Contact Details:  

 

Further information on XOCEAN USV operations can be obtained by contacting the personnel below: 

Position 

Phone Number 

Email 

USV Supervisor (24/7) 

+353 (0) 1 223 9950 

usv.supervisor@xocean.com 

Marine Superintendent 

+353 (0) 1 223 9957 

anthony.otoole@xocean.com 

Assistant Marine Superintendent 

+353 (87) 917 3136 

stephen.leydon@xocean.com 

 

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Rig - Noble Invincible

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Abandoned fishing equipment/seabed fastener - Exa Hibernia Segment C

Fouled fishing equipment. Following on from a repair completed to the Hibernia/Exa Dublin – Southport cable, abandoned trawl equipment fouled on the seabed and very close to the submarine cable has been identified in position 53 48.2166N  04 28.7343W

All fishermen are strongly advised to avoid fishing in this area, giving a minimum clearance of 0.25 nautical miles from this abandoned fishing equipment, to avoid risk of further fouling and/or entanglement with the Hibernia/Exa cable and therefore possible endangerment to the vessel and its crew.

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Rig Move - PBLJ MODU at Callanish

Notice to alert sea users to drilling and completion operations at the Callanish 15/29b-FQ subsea development well location, using the PBLJ MODU.

The PBLJ semi-submersible drillling rig is due to move to the Harbour Energy 'Callanish' subsea development location at the end of December to comence drilling and completion operations on the 15/29b-FQ development well.  

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Rig Move - Noble Intrepid at Judy

Notice to alert sea users of the planned location of the Noble Intrepid jack-up MODU alongside the Judy production installation in block 30/7a.

The Noble Intrepid jack-up MODU will be locating alongside the Judy production installation in block 30/7a to provide accommodation and perform well intervention work.

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Rig - Noble Intrepid

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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PL24 Cut-point Freespan

The cut-point of PL24 has become exposed and is protruding significantly from the seabed; approximately 17m long and 6m high. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.

The cut-point of PL24 has become exposed and is protruding significantly from the seabed; approximately 6m from the seabed at its highest point and overhanging approximately 17m long from where the line makes contact with the seabed again. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.

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Site Investigation Survey - Norfolk Windfarm Boreas, Vanguard West, Vanguard East

Please be advised of this notice advising mariners of the site investigation survey of the Norfolk Boreas, Vanguard East and Vanguard West windfarms and export cable. The Noordhoek Pathfinder and Geo Ranger will be completing survey operations in UK waters. The surveys started in March 2023 and are scheduled to last until the end of April 2024 (subject to weather and additional scopes).

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ERI Scientific Deployments

Works to deploy up to 7 temporary linear weighted moorings for marine mammals (passive acoustics) and 1 weighted frame for fish (active acoustics) and oceanographic data collection. There will be 8 moorings in total. Deployments will occur on 1 day between 8th- 20th December 2023. Moorings are intended to remain in place for a period not exceeding 6 months, until April/May 2024. None of the moorings will have any surface expression.

Moorings 1-7 are equally spaced from each other (500 m) in a linear array, running in a Southern direction starting from a point 600m to the Southwest of Hywind Scotland turbine HS5. Mooring 8 is located ~1000 m from Hywind Scotland turbine HS4.

 

Figure 1 (Attachment) shows the general area where the moorings will be deployed.

 

Figure 2 (Attachment) shows the planned locations for each mooring.

 

Avoidance of the mooring locations is requested for any activity that might disturb the moorings, specifically trawling or other such activities that might interfere with the seabed or local water column.

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Foinaven Buoyant Risers

As per a previous notification (Sep 2022), the Petrojarl FPSO has been removed from the Foinaven field. 13 risers remain on site, with buoyant sections located up to 160m above the seabed. A recent check confirmed riser location and height has not changed, but they remain a snagging hazard. 3 new Statutory Instrument 500m safety zones replace the original FPSO safety zone - visible on Admiralty charts and Fishsafe. The zones fully encompass all buoyant risers, and remaining seabed assets.

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Mooring and scientific equipment installed – Cromarty Firth and Chanonry Point

The University of Aberdeen has deployed 2 moorings with Passive Acoustic Monitoring (PAM) equipment on surface marked moorings at the entrance to the Cromarty Firth and near Chanonry Point. The moorings support sound recording equipment and/or acoustic loggers that record the echolocation clicks of dolphins and porpoises. The moorings will remain at these locations throughout the winter of 2023/24 and will be serviced in Spring 2024.

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Anchor Pattern for Valaris-V121 at Shearwater

Valaris jack-up V121 rig on location at Sheaerwater platform, including anchor patterns.

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Rig - West Elara

This oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Cable exposures - IFA2000 Interconnector

A recent survey has detected a section of cable with intermittent exposures and potential free spans in the UK sector of the IFA 2000 Interconnector. These exposures are found across all four cables west of 001° 17.2’E . Fishing vessels are advised to keep clear of this area.

A recent survey has detected an area where the cable is intermittently exposed with some free spans a possibility. The exposures are present intermittently across all four cable routes in the area bounded by: 

51° 5.23’N 001° 17.20’E

51° 3.33’N 001° 17.20’E

51° 5.00’N 001° 11.67’E

51° 4.88’N 001° 11.67’E

 

A remedial plan is being formulated. Fishermen are requested to stay well clear.

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Seabed hazards following removal of Banff FPSO anchors & moorings

A series of deep, steep sided trenches at mooring line touchdown points. Moorings and anchors have been removed, leaving the seabed features.

10 mooring line trenches, varying in length from 70m to 180m; up to 8 metres wide and up to 9 metres deep. These trenches are steep-sided, cut into the clay seabed.

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Floating LiDAR and Metocean Survey Deployment - MachairWind Offshore Wind Farm

A floating LiDAR buoy, surface metocean equipment buoys and seabed landers have been deployed at two sites to assist with the development of MachairWind Offshore Wind Farm. The floating LiDAR buoy and metocean equipment was deployed between 28th April – 29th April 2023 by Fugro from the Port of Burntisland. The Forth Warrior vessel deployed the floating LiDAR and Metocean survey equipment. Mariners are requested to keep a distance of 500 metres from the Site 1 and Site 2 deployment locations.

The floating LiDAR buoy, surface metocean equipment buoys and seabed landers have been deployed at two separate locations. The equipment deployed will gather wind and metocean data which will be used to inform the development of the Project.

 

The Floating LiDAR  buoy , Metocean Midi Buoy and Metocean Wavescan Buoy are all surface buoys, tethered to the sea bed with single mooring lines. The Seabed Lander is a frame anchored on the seabed, approximately 1.7 m diameter and 0.6 m high. 

 

The Floating LiDAR buoy, Metocean Midi Buoy and Metocean Wavescan Buoy have light marking characteristics comprising FI (5) Y 20s with a nominal range of 5 nautical miles.

 

Surface equipment at Site 1 and Site 2 are transmitting their locations via AIS.

 

Equipment details and mooring designs of the floating LiDAR buoy, metocean buoys and seabed lander are provided in this notice to mariners.

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Installation of Monopile foundations - Moray West offshore wind farm

This notice to mariners is to inform that Moray Offshore Windfarm (West) Limited (Moray West) will be commencing Monopile, Transition Piece and Offshore Substation installation works at the Moray West Offshore Wind Farm

(Windfarm Marine Licence MS-00009774) installation from and no earlier than 1 October 2023. The first work scope, which will be undertaken, is the installation of Monopiles from the 1 October 2023.

 

Please be aware that, during the Monopile installation works, the Bokalift 2, by virtue of its mode of operation the vessel, will be Restricted in its Ability to Manoeuvre (RAM). Masters of vessels are requested to maintain their vessels and gears at a minimum safe passing distance from the vessel of 500 meters when it is undertaking work and showing the appropriate shapes and lights in accordance with COLREGs Rule 27 (International Regulations for Preventing Collisions at Sea 1972, Rule 3).

 

The scope of work includes the installation of Monopiles and Transition Pieces at 62 foundation locations, and the installation of two Offshore Substations. The installation of Monopiles and Topsides will be carried out with dynamically positioned installation vessels.

The installation of the Transition Pieces will be carried out from a jack-up vessel. A separate Notice to Mariners will be issued ahead of the start of Offshore Substation installation and ahead of the Transition Piece installation works.  

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Platform Decommissioning - Cavendish and Windermere platform

The Cavendish and Windermere platforms are being removed from the Southern North Sea. A heavy lift vessel and associated anchor handing vessel and emergency response vessel will be present within the Cavendish and Windermere 500m zones from as early as the 10th October. The operations will involve the heavy lift vessel going between the two platform locations and The Netherlands.

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Metocean buoy - Pierce Area

A spherical wave buoy with a diameter of 0.9 meters was installed at Pierce Field on August 29th.

Colour: yellow

Shape: spherical

Diameter: 0.9m

 

The lantern has a flash sequence Fl (5) Y 20s. Please maintain a 200m exclusion around the buoy.

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Rig - Valris 72

This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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FPOD seabed moorings

Sub-sea moorings deployed on (and to approximately 6 m above) seabed at three locations with the below 100m x 100m boxes. Each location will have acoustic monitoring devices attached between two clump weights spaced 50m apart. All equipment will be subsurface with no marker buoy, and will protrude approximately 6m vertically from the seabed. All equipment will be labelled with relevant contact details. Deployments will be conducted from the research vessel Princess Royal.

ABPmer are due to conduct a series of survey equipment deployments along the Northumberland coast. This work is being conducted for Natural England under MMO license ref: L/2023/00260/1. Vessel will display RAM throughout operations and will be contactable on VHF Channel 16 and other appropriate working channels.

 

All equipment will remain in place for 18 months following deployment w/c 21 August 2023, with interim service visit at approximately 4 month intervals. All vessels are requested to pass the relevant locations above by a minimum of 100m throughout the duration of the equipment in place.

 

Further notice will be provided when all equipment is removed from each location.

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Shearwater IWA well (22/30b- 18) - 30" Conductor stump

The Shearwater IWA well has been left in a suspended status with the 30" conductor including a debris cap protruding from the seabed approximately 8ft. This is a snagging risk and vessels are advised to remain a safe distance clear.

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Drilling activity - Valaris 122 at Jackdaw

The Valaris 122 (jack-up drilling rig) will be conducting drilling operations at the Jackdaw field on the 30/2a-JD02, JD03, JD05, JD06 wells. The Valaris 122 will be drilling through the newly installed Jackdaw platform on a four well campaign. The total duration of drilling and completion activities is expected to last approximately 538 days.

Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig Move - Shelf Drilling Fortress (Invergordon to Golden Eagle)

Please be advised that the Shelf Fortress heavy-duty jack up drilling rig is planned to move from Invergordon Anhcorage No.10 to the Golden Eagle Field on 16th August 2023. This notice is to provide notification of the planned rig move and anchor positions at final location. This notice will remain live until anchors are recovered.

The Shelf Drilling Fortress will be positioned alongside the Golden Eagle platform with a rig heading of 335.9 degrees. The planned anchor positions are as below:

 

1. Starboard-Forward: 623 558 E, 6 427 414 N, 850m line length from fairlead

2. Port-Forward: 622 443 E, 6 426 873 N, 850m line length from fairlead

3. Starboard-Aft: 624 075 E, 6 426 308 N, 795m line length from fairlead

4. Port-Aft: 622 991 E, 6 425 783 N, 795m line length from fairlead

 

 

 

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Marine Hazard and Archaeological Exclusion Zone - Dogger Bank C Export Cable

A new marine hazard has been identified during UXO identification and investigation operations in the Dogger Bank C export cable corridor.

The marine hazard is located on the seabed in the near vicinity of the intended route of the DBC export cable and is a group of metallic objects associated with military (probably WW2) activity in nature.

 

A 50 metre Archaeological Exclusion Zone (AEZ) has been implemented under the terms of the Written Scheme of Investigation (WSI) produced and agreed with Historic England as per Licence condition in accordance with 16(g) of dML 1 and Condition 13(g) of dML 3.

 

Fishing vessels and other vessels engaged in the deploying of sub-surface and bottom interacting gear should avoid the area.

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Rigmove - Valaris 121

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.

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ILI Activation Tool - Snagging Risk

Installation of two ILI Activation Tools on the Main Oil Line (MOL) was completed on 12/07/2023 by a dive support vessel (DSV). The tool is a small structure that will go around the Main Oil Line (MOL) and will remain in place until October 2024. This will be a snagging hazard for nets and trawlers.

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PrePARED Fish Tracking Array - Beatrice and Moray East Offshore Windfarms

Marine Scotland Science (MSS) intend to install 87 acoustic fish tracking moorings in the Beatrice and Moray East Offshore Windfarms areas (BOWL (38 moorings) and Moray East (49 moorings)) as part of the PrePARED programme of works. PrePARED is a collaborative research project coordinated by Marine Scotland Science which aims to concurrently study predator (seabird and marine mammal) and prey (fish) distribution and behaviour in and around offshore wind farms.

Marine Scotland Science (MSS) intend to install 87 acoustic fish tracking moorings in the Beatrice and Moray East Offshore Windfarms areas (BOWL (38 moorings) and Moray East (49 moorings)) as part of the PrePARED programme of works (figure 1 & 2). PrePARED is a collaborative research project coordinated by Marine Scotland Science which aims to concurrently study predator (seabird and marine mammal) and prey (fish) distribution and behaviour in and around offshore wind farms. The moorings hold research equipment that support hydrophone receivers. These receivers log the presence of fish, such as Cod, Haddock and Whiting which will be tagged with acoustic ID transmitter tag s (they will also record salmon and seatrout smolts migrating from Moray Firth Rivers tagged by the Atlantic Salmon Trust (AST) should they pass within range).

 

The proposed locations of the fish tracking moorings are shown (Figure 1); the positions of the moorings are given in WGS84 (Table 1). The moorings will be deployed from the 10th of April 2022 by a the Waterfall operated by Moray First Marine. The moorings will be removed by the 30th of August 2026.

 

Acoustic fish tracking moorings will not be surface marked and will be located on the seabed. The array moorings will extend vertically no more than 4 metres. The moorings will be serviced by boat, using the inbuilt acoustic recovery system. In the unlikely event of failure in the acoustic release system an ROV will be used from the same boat to service the mooring.   Please note the acoustic fish tracking moorings are being deployed as close to the wind turbine generators as possible to minimise interference with fishing operations (50m), should these be accidently caught only the instruments are required to be returned and the location of the discarded weight should be supplied to MSS for recovery later.

 

Fish capture traps and timed-release cages (8 traps and cages in total; Figures 3 and 4) will be deployed in Moray East and Beatrice sites. These traps and cages will be used in the capture and managed release of fish needed for internal electronic tagging with acoustic ID transmitter tags. Traps and cages will be present at Moray East and Beatrice for up to 10 days commencing 13th of April. Traps and cages will move at 1 to 2-day intervals. All traps and cages will be marked with creel style floats and clearly marked “Marine Scotland Science” and be marked with an AIS beacon (visible as MARLAB 1 – MARLAB 8). Traps and cages will be at least 100 metres from turbine locations. Locations of traps and cages will be notified to the relevant windfarm Marine Control Centre as appropriate

 

Contact details

 

All enquiries should be made to the Marine Scotland acoustics mailbox  acoustics@scotland.gsi.gov.uk) marked for the attention of Robert Main. Switch Board Tel: 0131 244 2500

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Nearshore Works Temporary Marker Buoy - Dogger Bank C

The nearshore works to prepare for installation of the Dogger Bank C export cable have now been completed. The temporary marker buoy will remain in position in the vicinity of the Horizontal Directional Drill (HDD) North and South exit points as shown in the graphic inlcuded with this notice with a chart of the general area where the temporary marker buoy is located. The characteristics of the temporary marker buoy are included in this notice.

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Potentially exposed cable - Caithness Moray HVDC link

Scottish Hydro Electric Transmission Plc has become aware of two areas of potential cable exposure on the Caithness Moray HVDC link, and request that a 500m safety zone is observed

Scottish Hydro Electric Transmission Plc has become aware of two areas of potential cable exposure on the Caithness Moray HVDC link, and request that a 500m safety zone is observed centred on the co-ordinates below.

 

KP

Longitude (WGS 84)

Latitude (WGS 84)

99.240

-2.8633908494

58.4590588736

105.282

-2.9656976221

58.4615448756

 

Mariners are requested not to anchor or tow equipment inside the 500m safety zone surrounding the potentially exposed cable, as this would pose a risk of both snagging and / or damage to vessels, gear and the Caithness Moray HVDC link.

 

This email serves as notification under condition 35 of licence 04368/18/2

 

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Acoustic receiver cannisters deployed on seabed - Gunna Sound, Coll & Tiree

NatureScot and the University of Exeter have deployed 10 Acoustic Receiver Cannisters in the Sea of the Hebrides around Gunna Sound. The ARCs are low profile (35cm height and <0.75m2) and consist of 3x11 inch floats fixed to a delrin plate that holds the acoustic receiver floating ~3m above anchor (~45kg chain links). The ARCs will be serviced twice a year remotely from a vessel and completely removed at end of 3-5 years. There are no surface markers associated with these devices.

NatureScot, in collaboration with University of Exeter, have deployed 10 Acoustic Reciever Cannisters in the Sea of the Hebrides around the Gunna Sound area.

These equipment collect acoustic information on the movement and residency of tagged basking sharks with the Marine Protected Area.

 

The ARCs are low profile (35cm height and <0.75m2) and consist of 3 x 11 inch floats fixed to a delrin plate that holds the acoustic receiver floating ~3m above anchor (~45kg chain links). The ARCs will be serviced twice a year remotely from a vessel and completely removed at end of 3 - 5 year. There are no permannet mooring lines or surface markers associated with these devices. The equipment are intermittently retrieved for servicing by triggering the release of a recovery line from ARC unit.

 

If an ARC is recovered please retain and contact the University of Exeter or NatureScot (using point of contact). All ARCs are labelled with contact details on the anchor chain links and on the ARC units.

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Welsh Acoustic Marine Mammal Survey (WAMMS) - Anglesey Marine Special Area of Conservation

To monitor underwater sound and marine mammal activity in the Anglesey Marine Special Area of Conservation. This will be achieved by the deployment of sensors on the seabed for a period of 22 months from May 2023 until February 2025. This equipment may pose a hazard to fishing or survey operations in the area and operators are requested to be mindful of the deployment of gear.

The survey aims to obtain information on: a)    sound levels in the SAC. b)    the presence of marine mammals in the SAC.

 

This will be achieved by the deployment of sensors on the seabed for a period of 22 months from May 2023 until February 2025. This equipment may pose a hazard to fishing or survey operations in the area and operators are requested to be mindful of the deployment of gear. It should be noted that the sensors will not have surface markers. If the sensors are accidentally removed, they will be marked with Cefas / Bangor University - please contact us to arrange return.

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Floating LiDAR and Metocean Survey - Muir Mhòr Offshore Wind Farm

Metocean instrumentation and a floating LiDAR system (FLS) have been deployed within the boundary of the proposed Muir Mhòr Offshore Wind Farm Project site. All instrumentation was deployed by Green Rebel from the Port of Aberdeen to the site in February 2023 via the vessel BB Ocean (IMO 9196503, MMSI 258825000). MARINE USERS are requested to maintain a safe clearance distance of 500m from all assets. May 2023: Northern Guard Buoy no longer present, replacement process is ongoing.

All instrumentation is deployed at a single deployment location within the project site. The purpose of the instrumentation is to gather Metocean and wind data to inform the proposed Muir Mhor Offshore Wind Farm Project.

 

The FLS mooring comprises of a surface visible buoy moored to the seabed via a two-point mooring system constructed using a combination of rope and chain.  Two guard buoys are located at approximately 30m from the main FLS buoy in a North/South orientation, with the mooring spread covering an approximate 315m radius. There is also a seabed frame for current measurements contained within the overall deployment footprint, approximately 30m East of the main FLS buoy. Note: there are 2x orange polyform marker buoys located above the northern anchor position (detailed below) which will be removed during the first planned maintenance visit.

 

The FLS light characteristics are Fl (5) Y 20s with 5nm range. The guard buoys’ light characteristics are FI Y 5s with 3nm range and include a yellow St. Andrew’s Cross topmark. The FLS is designated as “Muir Mhor Floating Lidar” on AIS, with MMSI number 992351400.

 

Details of the surface visible buoy, guard buoys, seabed frame and mooring arrangement are provided in the attachments.

 

MARINE USERS are requested to maintain a safe clearance distance of 500m from all assets.

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Possible Hazards (initial ‘trawl sweep’ findings)

The Moray East Over Trawl Survey (Export Cable Trawl Sweep) was undertaken by the MV Sardonyx between the 1/9/2021 and the 5/9/2021. The work was undertaken using appropriate gear types for the locations outlined below, with the crossings being undertaken successfully. At Section 1, at crossing position 57°41.962'N 002°33.078'W, the gear encountered a peak tension and a reduction in gear spread.

At this location, the export cables are buried to the required depth and the trawl gear did not pass over any rock protection or any known boulders, as such the cause of the peak tension is unknown. This will be investigated by the project at the earliest available opportunity.

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Sizewell Waverider Buoy

Please see attached document for the fixed location of the Sizewell Waverider buoy and the notice to mariners.

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