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Construction of wind farm - Moray East



Due to the construction of the Moray East Offshore Wind Farm, there are several elements to this notice - safety zones; construction schedule; and buoy positions.


For background information about Moray East, please visit: www.morayoffshore.com/moray-east

 

Safety Zones

Please be advised that the Scottish Ministers have authorised the use of the safety zones during construction and operation of the Moray East Offshore Wind Farm as detailed below.

 

During construction

  • A 500 metre radius around each WTG and OSP where construction works are taking place that include sensitive activities being undertaken by vessels RAM. A maximum of three of such zones is permitted at any one time. 
  • A 50 metre radius around partially completed WTGs and OSPs where work is not underway and the risk assessments identify a need. 
  • A 50 metre radius around each completed WTG and OSP prior to commissioning and as required by a risk assessment process. 

During major maintenance

  • A 500 metre radius around all major maintenance works being undertaken around the WTGs and OSPs. No more than one major maintenance zone is permitted at any one time.

Construction Activities

It is currently anticipated that weather permitting offshore construction works will be carried out on a continuous basis (i.e. 24 hour working, seven days a week) unless notified otherwise.

 

Please be aware that by virtue of its mode of operation and the equipment deployed, construction vessels listed in the table below may be Restricted in their Ability to Manoeuvre 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 distance from these vessels of 500 metres when they are undertaking it work and showing the appropriate shapes and lights.  Further Notice to Mariners will be issued as construction progresses.

 

  •  
 

Company,

Vessel &

Call Sign

Survey Area

Survey Area

Start Timeframe & Duration

GV Replenish

MASY7

As above

As above

1st May 2019 for approximately 34 months

GV BOUNTIFUL

MJLF4

As above

As above

30th April 2020 for approximately 20 months

NSL Discovery

As above As above 13th April 2021 until further notice

Windcat19

2ATD3

As above As above 20th August 2020 Until further notice

Windcat 6

MXFD

As above As above from September 23rd 2020 onwards

GV Kinnaird 

GHNE

As above

As above

16th July 2020 Until further notice
GV Ability As above As above 16th July 2020 Until further notice

Acta Centaurus

As Above As Above 21st January 2021 until further notice

World Bora

OWJW2

As above As above 1st October 2020 Until further notice
HST Harri As above As above 28th January 2021 Until further notice
Windcat 40 As above As above 4th Feb 2021 until further notice
  As above As above  
Njord Balder As above as above 03rd May 2021 until further notice
  As above As above  
  As above As above  
Waterfall As above As above 30th March 2021 until further notice
Island Crown As above As above 20th May Until further notice
Blue Tern As above As above 30th April until further notice
Acta Auriga As above As above 3rd May until further notice
Olympic Artimus As above As above 20th May until further notice

 

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Export Cable Installation (Beach) - Hornsea Project Two



Ørsted continuing export cable installation works in the intertidal area as part of the ongoing construction of the Hornsea Project Two OWF.The export cable pull has been completed, the cable is exposed on the intertidal area prior to cable burial works.


Landfall Preparation and Cable Installation Please be advised that the second of three export cable pull-ins is complete and the SW cable (yellow, central circuit shown in Figure 1) is exposed on the beach prior to burial works commencing. The Maagd will be leaving site on or around 10th May 2021 and returning approximately 2 weeks later. In addition to this export cable installation activities in the intertidal area are ongoing at the landfall at Horseshoe Point, Lincolnshire and will continue until approximately 30th September 2021. Works will be continual and intermittent throughout these periods.

It should be noted that export cable seabed preparation and installation seaward of mean low water springs is ongoing until end of 2021.

 

Vessels:

 

Vessel & Call Sign Activity

Ndurance

5BVH3

Cable Installation and burial

Coastal Vanguard

PCFH

AHT

Linestroom

PICW

AHT
Maagd Landfall tranporattion barge

Titan Endeavour

2ELT9

Nearshore Survey

 

 

 

 

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Unmanned vessel survey in Hywind Scotland Wind Park area



Use of a 2 meter long remotely controlled unmanned vessel to collect fish biomass information for the Hywind Scotland Wind Park area during June and July


As part of the Hywind Scotland Wind Park, Equinor has subcontracted Akvaplan-niva to perform a survey using an autonomous vehicle – Sailbuoy – in the park area. The Sailbuoy is only 2 meters long and weighs 60 kgs. It will be deployed in second half of May in Bergen, Norway, and sail to Hywind Scotland. The time needed from Bergen to Hywind Scotland is approximately 21 days (~arrival primo/medio June). The Sailbuoy will have a pre-programmed mission plan, and will communicate to shore via satelittes. The Sailbuoy is driven by wind and sun, and the vehicle is equipped with solar panel and an echosounder as well as sensors for temperature, salinity and fluorescence.

 

The purpose of the study is to collect relevant data on fish in the Hywind Scotland area using instrumented glider. The method is expected to mainly give data on prevalence and biomass, and less information on biodiversity. The data gathering in Hywind Scotland will take approximately 30 days (~until primo/medio July). After ended campaign in the wind park, the Sailbuoy returns back to Bergen for retrieval (~primo August). The results from the glider campaign is important also for further technology development.

 

The Sailbuoy is collision and shock proven. It will be labelled with contact information.

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Hazard Anchor Chain Approx 25m - Neart na Gaoithe Offshore Wind Farm



Mariners are advised that during boulder clearance works, the Sartor has discovered a seabed hazard within the boundaries of the offshore wind farm. The hazard has been identified as an anchor chain, with approximately 25m visible on the seabed surface.


A 50-metre exclusion zone is advised around the anchor chain for safety reasons.  

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Construction of Wind Farm (Triton Knoll)



Activities are continuing related to the development of the Triton Knoll wind farm, as detailed below. For background information visit: http://www.tritonknoll.co.uk/


Mariners are advised of the following vessels commencing operations at the Triton Knoll Offshore Wind Farm as outlined below:

 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Precision 1 Survey / Guard Vessel 2FCD2 235089165 N/A Hull 26/04/2021

 

Mariners are advised of the offshore construction status at the Triton Knoll Offshore Wind Farm:

 

The following vessels continue to be active at the Triton Knoll as outlined within previously issued NtM's 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Seacat Intrepid

Crew Transfer

2HWU6

235107284

N/A

Grimsby

02/01/2020

Esvagt Froude

Service Operations Vessel

OWWN2

219590000

9703461

Grimsby

02/02/2020

Esvagt Wind 1

High Speed Craft

XPE6305

219019815

N/A

Esvagt Froude

02/02/2020

Seacat Courageous

Crew Transfer Vessel

2IDC8

235108711

N/A

Grimsby

25/04/2020

Normand Fortress Service Operations Vessel LIKW3 258537000 9371218 Grimsby 15/03/2021
Windcat 11 Crew Transfer Vessel 2BIS9 235066459 N/A Grimsby 14/12/2020
World Mistral Crew Transfer Vessel OWJT2 219018009 9681302 Grimsby 01/03/2021
Pacific (Wind) Osprey Wind Turbine Installation Vessel 5BUF3 210286000 9621704 Able Seaton 10/01/2021
Acta Orion Service Operations Vessel PCEN 244830883 9750268 Immingham 15/01/2021
HST Euan Crew Transfer Vessel MGQO3 232025959 9883974 Grimsby 15/01/2021
Afon Las Buoyage Maintenance Vessel 2JEM8 235115261 9547398 Hull 01/04/2021
Afon Cefni Buoyage Maintenance Vessel 2FYX2 235095403 9258181 Hull 01/04/2021
Margaret Mary Guard Vessel MGNM6 232025575 N/A Grimsby 12/04/2021
Seacat Enterprise Crew Transfer Vessel MAPS9 232006483 N/A Grimsby 24/02/2021

 

Construction activities carried out over the previous 7 Days:

  • Ongoing activities at Offshore Sub Station Platforms East & West continues.
  • Ongoing activities at Offshore foundations continues.
  • Wind Turbine Generator Installation & Commissioning and Service continues infield (27 WTG's currently installed).

Construction Activities planned for the next 7 days:

  • Ongoing activities at Offshore Sub Station Platforms East & West continues.
  • Ongoing activities at Offshore foundations continues.
  • Wind Turbine Generator Installation & Commissioning and Service continues infield.
  • Expected arrival of Operations & Maintenance Crew Transfer Vessel – Windcat 11.
  • Expected arrival of Commissioning Crew Transfer Vessel - World Mistral.
  • Expected arrival of Survey Vessel - Precision 1.

*** 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.

 

Demarcation Buoys

Partrac Ltd have deployed x12 Demarcation Buoys and x2 Metocean Buoy at the Triton Knoll Offshore Wind Farm (TKOWF) to mark the perimeter of the TKOWF site boundaries.

 

Vessels are requested to leave a wide berth during the installation operations. The buoys will be deployed for a period of two years, and all equipment will be removed at the end of the installation.

 

Buoy

Structure

Latitude

Longitude

Individual Specification

TK01

South Cardinal

53°24.054'N

000°57.935'E

Pillar shaped with a south cardinal shaped top mark, exhibiting a Q (6) + L Fl 15s light character (5 nm nominal light range)  RECOVERED

TK02

Special Mark

53°24.568'N

000°54.433'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK03

Special Mark

53°26.132'N

000°50.008'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK04

Special Mark

53°27.457'N

000°45.927'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK05

South Cardinal

53°28.859'N

000°41.181'E

Pillar shaped with a south cardinal shaped top mark, exhibiting a VQ (6) + L Fl 10s light character (5 nm nominal light range)   RECOVERED

TK06

Special Mark

53°30.807'N

000°41.826'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK07

North Cardinal

53°32.196'N

000°44.248'E

Pillar shaped with a north cardinal shaped top mark, exhibiting a Very Quick (VQ) light character (5 nm nominal light range)

TK08

Special Mark

53°32.444'N

000°47.678'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range

TK09

North Cardinal

53°32.428'N

000°52.040'E

Pillar shaped with a north cardinal shaped top mark, exhibiting a Q light character (5 nm nominal light range)

TK10

Special Mark

53°29.595'N

000°55.306'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5 second (s) light character (5 nm nominal light range)

TK11

Special Mark

53°26.979'N

000°57.974'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK12

East Cardinal

53°24.368'N

001°00.228'E

Pillar shaped with an east cardinal shaped top mark, exhibiting a Q (3) 10s light character (5nm nominal light range)

TK13

Metocean Buoy

53°26.002'N

000°55.091'E

Triaxys metocean wave and current buoy (South) exhibiting a Fl (5) Y 20s light character (3 nm nominal light range)

TK14

Metocean Buoy

53°30.581'N

000°47.944'E

Triaxys metocean wave and current buoy (North) exhibiting a Fl (5) Y 20s light character (3 nm nominal light range)

 

Mariners are advised that all foundations monopiles have been installed and all inter-array and export cables have been installed, buried and need to be assumed as energised / live at all times.

 

Local Notice to Mariners Recently

NtM 001-2021 (05th January 2021)

NtM 002-2021 (20th January 2021)

NtM 003-2021 (17th March 2021)

NtM 004-2021 (24th March 2021)

NtM 005-2021 (06th April 2021)

NtM 006-2021 (16th April 2021)

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Dogger Bank A&B Landfall HDD Pilot Drilling



The offshore export cables, which will run from the offshore substation platforms (OSP’s) to the landfall, are 191 km in length for Dogger Bank A and 172 km for Dogger Bank B. These cables come ashore to the north of Ulrome on the Holderness Coast.


The main DBA and DBB landfall HDD pilot drilling will commence beyond the MHWS location from the 4th January 2021. A survey will then be carried out once each of the pilot drills has punched out onto sea bed to confirm accurate drill positions. The first survey is expected to be around 6th February subject to drilling progress.

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Survey - Pilot Drill Multi Beam Echo Sounder (MBES) - Dogger Bank B South



The MV Pulsar will conduct a Multi Beam Echo Sounder (MBES) survey of the pilot drilling head and the seabed at and around the horizontal directional drill (HDD) exit point of the Dogger Bank B export cable.


 

The survey will be a one-day operation starting early morning. Weather limitations are:

Wave height -0.5m, Wind Speed – 6m/s.

 

MV Pulsar will have survey equipment deployed into the water, pole mounted on the vessel’s port side and will be travelling at 2-4kts during the survey operation. The vessel will display lights and shapes appropriate to the operation.

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Survey - East Anglia HUB Offshore Wind Farm



Scottish Power Renewables (SPR) has contracted Fugro GM Marine Limited (Fugro) to carry out a geophysical and geotechnical site investigation located east of Lowestoft, in the southern North for the proposed East Anglia HUB offshore windfarm site.


The East Anglia HUB offshore windfarm site is split onto three zones: East Anglia ONE North (EA1N); East Anglia TWO (EA2); and East Anglia THREE (EA3).  In 2021, Fugro will be initially operating in EA1N only with operations commencing on 5th February 2021, with operations in EA2 and EA3 commencing subsequently.

 

This Notice to Mariners will be updated and reissued periodically as additional vessels are planned to come on site.  For operations in 2021, current planning indicates a total of 8 vessels being on site between the period 5th February and 18th August 2021. It should be noted these dates are subject to change and the total number of vessels could increase.

 

Vessel Call Sign Area Dates Duration
Fugro Venturer C6CG3 EA1N - OWF & ECC 05/02/21 8 Weeks
Fugro Frontier C6BH4 EA1N - OWF & ECC 12/04/21 3 Weeks
Fugro Frontier C6BH4 EA2 - OWF & ECC 01/04/21 9 Weeks
Fugro Frontier C6BH4 EA3 - OWF & ECC 11/03/21 3 Weeks

 

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Gwynt y Môr Cable Repairs



Briggs Marine Contractors (BMC) were contracted by Gwynt-Y-Mor OFTO to undertake a repair to the SSEC3 export cable due to a power core fault. The main works are completed. A small loop of cable remains unburied and raised above the seabed by approx. 2m


A north cardinal buoy is now in position 75m north of the cable loop on the following location and display a very quick flashing white light.

The marker buoy will remain in position until July 2022 when cable replacement works are planned to be completed by.

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Deployment of 2 x Metocean Buoys - North of Cromer



Partrac is to deploy two large metocean buoys (E03 and E13) at two separate locations approximately 18 miles northwest of Cromer and 28 miles north of Cromer in the southern North Sea 


Partrac is to deploy two large metocean buoys (E03 and E13) at two separate locations approximately 18 miles northwest of Cromer and 28 miles north of Cromer in the southern North Sea 

 

Once deployed, please maintain a 500m exclusion around each buoy.

 

Deployment is estimated to be carried out over one day from the 5th May 2021, weather permitting.

 

The deployments will be completed by the vessel Isle of Jura.

 

The surface buoys will include: AIS; A day shape of yellow St Andrews Cross; radar reflector; and yellow navigation light.

 

The metocean buoys 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  

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Seagreen Safety Zone Application - Wind Turbine Generators



Seagreen are submitting a safety zone application for their Wind Turbine Generators.Consultation is underway and anticipated to end 3rd June 2021. Further details are available in the safety zone application Seagreen at https://www.seagreenwindenergy.com


SEAGREEN WIND ENERGY LIMITED - THE ENERGY ACT 2004

NOTICE OF APPLICATION FOR SAFETY ZONE SCHEME DURING CONSTRUCTION AND MAJOR MAINTENANCE OF THE SEAGREEN OFFSHORE WIND FARM

THE ELECTRICITY (OFFSHORE GENERATING STATIONS) (SAFETY ZONES) (APPLICATION PROCEDURES AND CONTROL OF ACCESS) REGULATIONS 2007 – STATUTORY INSTRUMENT 2007 NO 1948

 

Notice is hereby given that Seagreen Wind Energy Limited (Seagreen) on behalf of Seagreen Alpha Wind Energy Limited (Company Number 07185533) and Seagreen Bravo Wind Energy Limited (Company Number 07185543), both having registered office at No. 1 Forbury Place, 43 Forbury Road, Reading has applied for consent from Marine Scotland as set out in the Energy Act 2004 and the Electricity (Offshore Generating Stations) (Safety Zones) (Application Procedures and Control of Access) Regulations 2007 (SI No 2007/1948) for safety zones as follows, for the previously consented Offshore Renewable Energy Installation known as the Seagreen Offshore Wind Farm, during the construction and major maintenance phases. The following safety zones are being applied for:

 

  • 500 metre (m) ‘rolling’ safety zones at each Wind Turbine Generator (WTG) and/or its substructures and foundations whenever construction is ongoing (as indicated by the presence of a construction vessel stationed at the structure).
  • 50 m pre-commissioning safety zones at each partial or complete WTG and/or its substructures and foundations, where construction is not ongoing up until the point of commissioning of the wind farm.
  • 500 m safety zone around any WTG and/or its substructures where major maintenance is being undertaken during the operational phase (as indicated by the presence of a major maintenance vessel stationed at the structure, where “major maintenance” is as defined in the Electricity Regulations 2007 (SI No 2007/1948) – further details are available in the application document as per the below).

It is noted that this application is being made for the WTGs only – a separate application has been submitted for the offshore substation platforms. Further details are available in the safety zone application which is available for download direct from Seagreen at https://www.seagreenwindenergy.com, or alternatively from the Marine Scotland website at http://marine.gov.scot/ml/seagreen-alpha-and-bravo-offshore-wind-farms. Alternatively, a request to receive a hard copy may be made in writing to 1 Waterloo Street, Glasgow, G2 6AY. Any person wishing to make representations to the Secretary of State about the application should do so in writing to the Scottish Ministers, c/o Marine Scotland – Licensing Operations Team, Marine Laboratory, PO Box 101, Victoria Road, Aberdeen, AB11 9DB or MS.MarineRenewables@gov.scot, stating the name of the proposal and nature of their representations, not later than 28 days from the date, or latest date of this notice.

 

Fair Processing Notice

The Scottish Government’s Marine Scotland Licensing Operations Team (“MS-LOT”) determine applications for marine licences under the Marine (Scotland) Act 2010, the Marine and Coastal Act 2009 and section 36 consents under The Electricity Act 1989 (as amended). During the consultation process any person having an interest in the outcome of the application may make a representation to MS-LOT. The representation may contain personal information, for example a name or address. This representation will only be used for the purpose of determining an application and will be stored securely in the Scottish Government’s official corporate record. Representations will be shared with the applicant and/or agent acting on behalf of the applicant, any people or organisations that we consult in relation to the application, the Directorate of Planning and Environmental Appeals should the Scottish Ministers call a PLI and, where necessary, be published online, however personal information will be removed before sharing or publishing.

 

A full privacy notice can be found at: https://www.gov.scot/policies/marine-and-fisheries-licensing/marine-licensing-operations-team-privacy-notice. If you are unable to access this, or you have any queries or concerns about how your personal information will be handled, contact MS-LOT at: ms.marinerenewables@gov.scot or Marine Scotland - Licensing Operations Team, Marine Laboratory, 375 Victoria Road, Aberdeen, AB11 9DB.

 

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Export Cable Installation - Triton Knoll Offshore Wind Farm



Please be advised that vessels will be undertaking survey operations in the Triton Knoll Offshore Wind Farm export cable corridor.


For further information: Lee Cornwall, Triton Knoll Offshore Wind Farm, Tel: +44 (0) 7384 807293, email: l.cornwell@tritonknoll.co.uk

Triton Knoll Marine Coordination Centre, Mob Tel: +44 (0) 7384 807528, Tel: 0045 8213 6219, Email: tkmcc@smchse.com

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Grace Hopper Subsea Fibre Optic Cable System - Route Clearance / Pre-Lay Grapnel Run Activities



OSV Nautilus call sign: EAOL will be carrying out Route Clearance / Pre Lay Grapnel Run, on behalf of SubCom LLC., across the pathway of the Grace Hopper Subsea Fibre Optic Cable System route in the UK EEZ. From 24 April 2021 to 30 July 2021


The operations will be carried out in the UK EEZ from 24 April 2021 to 30 July 2021. However, please note the start date and the duration of the activity is weather dependant.

 

OSV Nautilus will be towing stern deployed equipment and will be restricted in manoeuvrability. All vessels operating within this area are requested to keep their distance, maintaining at least the 500m safety zone around the vessel, and pass at minimum speed to reduce vessel wash.

 

Throughout operations, the vessel will be displaying the appropriate lights and shapes as required under the COLREGS Rule 27(b).  

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Survey - North Fall Offshore Wind Farm (Proposed)



North Falls Offshore Farm Limited has contracted Fugro GB Marine Limited to carry out a geophysical & environmental site investigation in the North Sea for the proposed Windfarm (NFOW) site using Fugro Mercator callsign: C6DU5 from 10th May for 8-9 weeks


The North Falls Offshore Wind Farm site is located to the east of Felixstowe and bordering the Greater Gabbard and Galloper existing wind farms

 

Fugro Mercator - Offshore Geophysical Investigation

 

The geophysical operations at the North Falls site are expected to be carried out from the Fugro Mercator call Sign: C6DU5 from 10th May 2021 for approximately 8-9 weeks. Fugro Mercator will be conducting operations across the Main Array and Export Cable Route areas >10m LAT.

 

As the Fugro Mercator will be towing survey equipment the vessel will require large turning circles and will be restricted in her ability to manoeuvre. All vessels operating within this area are requested to keep their distance, maintaining at least the 1,000m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

 

A continuous listening watch will be conducted on VHF Channel 16.

Survey operations will be conducted on a 24-hour basis  

Curtis Marshall - Environmental Investigation

 

The environmental operations at the North Falls site are expected to be carried out from the Curtis Marshall call sign: 2HWN3 from 1st July 2021 for approximately 7 days. Curtis Marshall will be conducting operations across the Main Array and Export Cable Route areas both offshore and nearshore.

Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

 

As the Curtis Marshall will be deploying equipment astern of the vessel, the vessel will require large turning circles and will be restricted in her ability to manoeuvre. All vessels operating within this area are requested to keep their distance, maintaining at least the 1,000m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

A continuous listening watch will be conducted on VHF Channel 16.

Survey operations will be conducted on a 24-hour basis  

 

Fugro Seeker - Nearshore Geophyscial Investigation

 

The geophysical operations on the North Falls export cable route from the 10m LAT contour inshore to the potential landfall, are expected to be carried out from the survey vessel Fugro Seeker call sign: 2HCS2 from 15th May 2021 for approximately 10 weeks.

Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

 

As the Fugro Seeker will be towing survey equipment the vessel will require large turning circles and will be restricted in her ability to manoeuvre. All vessels operating within this area are requested to keep their distance, maintaining at least the 500m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

 

A continuous listening watch will be conducted on VHF Channel 16.

 

Survey operations will be conducted on a 12-hour basis.

 

 

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Havhingsten Cable - surface laid cable



Please be advised that there are three areas of surface-laid cable, pending rock placement works.


Please be advised that the remaining post-lay burial (PLIB) works of the Havhingsten fibre optic telecommunication cable system have now been completed in the Irish Sea, but there are three areas of surface-laid cable which are pending rock placement works.

 

There is a maximum of 25m of cable surface laid with Uradact protection either side of the crossings listed below. Rock protection works will be carried out during the second half of 2021. It is advised that extra care is taken when vessels are operating near the areas and that no vessel should trawl within 0.25 nautical miles from the listed coordinates prior to rock placement. The rock berms will be over trawlable and in-line with industry standards.

 

Rock Placement Location Name

Latitude

Longitude

Western HVDC (S1.5)

53 ° 45.9867' N

003° 48.9137' W

Western HVDC (S1.2)

53° 54.7007' N

004° 58.3552' W

Western HVDC (S1.4)

53° 53.8396' N

004° 34.1792' W

 

For further information please contact the Fisheries Liaison Officer (FLO) / Fishing Industry Representative (FIR) numbers:

 

IoM Onshore FLO

Guy Sutton:                        rgsutton@outlook.com – 07624428332

 

FIR

Tom Watson:                     tomwatsonfleetwood@btinternet.com – 07903 173624

 

FLO (MarineSpace)

Bethan Owens:                 bethan.owens@marinespace.co.uk – 07833 557808

Claire Griffiths:                  claire.griffiths@marinespace.co.uk – 07498 550 586

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Eastern Link - Marine Survey Operations



Marine Survey Works for the Eastern Link Project.These works precede the installation of a HVDC electricity transmission link from the East coast of Scotland (Sandford Bay, Peterhead) to the East coast of England (South of Bridlington/ Flamborough Head).


The marine survey works are being carried out by Next Geosolutions UKCS Ltd. on behalf of National Grid Electricity Transmission Plc and Scottish Hydro Electric Transmission Plc.

 

The marine survey activities are planned to commence at Sandford Bay and close to Peterhead from the 20th April 2021. Upon completion of the Nearshore Marine Survey at Peterhead the vessel will transit to Bridlington to complete the Nearshore Marine Survey at Bridlington. Works will continue along the offshore route until August 2021. The marine survey works covered by this NtM are to be conducted by three survey vessels, divided into the following activities, as indicated:

 

Date Activity Vessel Call Sign
20 April 2021 Nearshore Marine Survey Peterhead SV Humber Guardian 2ENC3
May 2021 Nearshore Geotechnical Survey Peterhead MultiCat Forth Warrior 2JHR8
20 April - Aug 2021 Offshore Marine Survey, Peterehead to Bridlington MPSV Ievoli Cobalt IBOK
April / May 2021 Nearshore Marien Survey Bridlington SV Humber Guardian 2ENC3
May 2021 Nearshore Geotechnical Survey Bridlington MultiCat Forth Warrior 2JHR8

 

The Nearshore works are to be conducted West, of point AC6, Longitude 1° 43.5’W at Peterhead and West of point AC61, Longitude 0° 03.7’W South of Flamborough Head, Bridlington, reference Figures 1 and 2 overleaf. All vessels shall pass at a safe speed and distance, whilst fishing vessels shall remain at a safe distance (approximately 500 meters) (COLREGs Rule 16 & 18) from the areas identified during marine survey operations. The aforementioned survey vessels will be restricted in her ability to maneuver 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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Unexploded Ordnance & Boulder clearance - Seagreen Offshore Windfarm



An unexploded ordnance and boulder clearance geophysical survey will take place within the Seagreen Offshore Windfarm site boundary.


The survey vessel, Geo Ranger will utilise towed array equipment with side scan sonar, sub bottom profiler and magnetometer to conduct the survey of all 114 Wind Turbine Generatorpositions and 1 Offshore Platform location within the Seagreen site boundary.The survey vessel is expected to arrive at site on or around Sunday the 21st of March and remain until August 21, weather dependant.

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Inter Array cable Termination and testing



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are carrying out Inter Array Cable Testing and Termination Works within the bounds of site 1.


Inter Array Cable Termination and Testing.

 

Personnel and equipment for these works will be based on the Offshore Support Vessel, Siem Day. Personnel and equipment will be transported by Siem Day between OSPs and WTGs. Deep Cygnus and Siem Day will both be completing Testing and Termination works on the cable routes identified in Figure 3.

 

Siem Day will be restricted in their ability to manoeuvre during transfer of personnel and equipment to and from the OSPs and WTGs.

 

The overall work scope will be carried out in 2 campaigns – Campaign 1 commencing 11/11/20 to 23/01/21, now complete, and Campaign 2 commenced 24/02/21 and is scheduled to be completed on 11/06/21

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Dogger Bank B Geophysical Survey



The survey vessel, Fugro Venturer, will conduct a geophysical survey at the Dogger Bank B wind farm (DBB) array site


Fugro Venturer, will conduct a geophysical survey at the Dogger Bank B wind farm (DBB) array site in the Southern North Sea, between 4th April 2021 and approximately 25th May 2021. Survey operations will be continuous, 24 hours a day, the vessel towing subsea sensors up to approximately 100m behind the vessel. During operations the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights.

 

The Fugro Venturer will be surveying prescribed survey lines, which will require large turning circles. It is therefore requested that all vessels maintain a minimum 2,000m separation distance from the survey vessel and pass at reduced speed.

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Snagging Hazard - Dropped Object Clump Weight (360kg)



The dropped object is a clump weight (360kg). This is part of the DP taut wire system. From C10 the clump weight lays 162m north of the structure. The object rests 8m east of C10-C11 RPL.


JSA and Task plan are being compiled for a recovery with vessel crane and ROV intervention.

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Kincardine Offshore Windfarm - Development



Horizon Artic call sign: CHA2033 will shortly begin a campaign of moorings installation at the Kincardine offshore wind farm.


Additional work will be continuing for the commissioning of the turbine, requiring regular crew boat transfers on a daily basis.

 

The floating wind turbine KIN-03 complete with assembled wind turbine is moored in its operational location. 

 

  Location Light Sound Signal
North Corner (with Turbine C1) 56°59.356’N   001°51.983’W Yellow every 5 seconds -
South East Corner (C2) 56°59.340’N  001°52.037’W Yellow every 5 seconds Morse “U” every 30 seconds
South West Corner (C3) 56°59.322’N  001°51.984’W  Yellow every 5 seconds -
KIN-03-ML1 Anchor As-Built 56°59.587’N  001°51.749’W N/A N/A
KIN-03-ML2 Anchor As-Built 56°59.338’N  001°52.518’W N/A N/A
KIN-03-ML3 Anchor As-Built  56°59.048’N  001°51.709’W N/A N/A

 

Horizon Artic call sign: CHA2033 will shortly begin a campaign of moorings installation at the Kincardine offshore wind farm.

 

Estimated Arrival of the Horizon Arctic in the field will be 01/04/2021 and the duration of the installation will be about 7 days. The works expected are as follows:

KIN-02 56°59.835'N  01°52.428'W
KIN-05 57°00.632'N  01°50.861'W
KIN-01 57°00.318'N  01°52.870'W

 

Cable Guard Vessel: MV Fisher Boys FR54  call sign: MXHY7

 

 

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Survey - Dogger Bank B Windfarm



The Fugro Venturer is due to undertake a Geophysical survey at the proposed Dogger Bank B windfarm location in the Southern North Sea, 193 kilometres East of Newcastle, between 4th April 2021 and approximately 25th May 2021.


Survey operations shall be conducted 24 hours a day and the vessel shall tow subsea sensors approximately up to 100m behind the vessel.  During operations the vessel will have restricted manoeuvrability. The Fugro Venturer will be surveying prescribed survey lines, which will require large turning circles, therefore, it is requested that all vessels operating within this area keep their distance, maintaining at least the 2,000 m exclusion zone around the vessel and pass at reduced speed.

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Survey - Hornsea Four Offshore Windfarm



Hornsea Four Offshore Windfarm will be carrying out offshore geophysical survey using the vessel Northern Storm call sign: MISA7 from 6th April until end of July 2021.


Survey completion is anticipated by the end of July 2021. The full scope of the works is anticipated to take 90 days to complete, with approximately 45 days duration surveying the proposed export cable corridor and 60 days duration surveying the proposed windfarm array areas.

 

The vessel Northern Storm call sign: MISA7 will be utilised for this survey. A local scout vessel is also contracted to reduce potential for static fishing gear interactions.

 

The survey area will be covered using a full geophysical survey spread including towed equipment. It is requested that all vessels operating within the area keep a safe distance (at least 500m) and pass at minimum speed/reduced wash.

 

 

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Export Cable Installation - Hornsea Project Two



Ørsted will be commencing export cable remedial works where the cable is currently being wet-stored, as part of the export cable installation scope for the Hornsea Project Two Offshore Wind Farm.


Mariners are advised that the Titan Endeavour is mobilising to site to carry out survey works that will continue intermittently through 2021.

 

Activities are being carried out on the Hornsea Project Two Offshore Wind Farm export cable route. Mariners are advised that MaxSea and Olex plotter files of the proposed works area can be provided by the Project’s Commercial Fisheries Advisors at Brown and May Marine Limited and the Project’s onshore fisheries liaison.

 

Export Cable Installation

Please be advised that Boskalis will be undertaking cable remedial works on or around 15th March 2021 with the BokaBarge 82, Voe Vanguard, Lingestroom and Barney at the location where the cable is currently being wet stored. In addition to this, the Titan Endeavour will be mobilising to site shortly to carry out survey works that will continue intermittently through 2021.

 

Boskalis are temporarily wet storing a cable at the RCS and the OSS. A guard vessel will be present, subject to safe weather conditions, whilst the cable is wet-stored but it is advised that mariners maintain a safe clearance. 

 

Note that the vessels will have limited manoeuvrability, some vessels will be operating on anchors, and it is requested that all vessels operating near the vessels maintain a safe distance (at least 500m) and pass all vessels at minimum speed.

 

Export Cable Corridor Boulder Clearance

Please be advised that Hornsea Project Two will be continuing boulder clearance within the export cable corridor using the Atlantic Tonjer call sign: HOBO on or around 25th March 2021.

 

The works will continue intermittently through to Q2 2021. This Notice will be updated and re-issued when works are completed.

 

Note that the vessels will have limited manoeuvrability and it is requested that all vessels operating near the vessels maintain a safe distance (at least 500m) and pass all vessels at minimum speed.

 

Array Cable Seabed Preparation & Installation

Ørsted will be commencing pre-lay surveys and seabed preparation for array cable installation with the Simar Esperanca and rock deployment with the Flintstone on or around 21st March 2021, shortly followed by array cable installation itself on or around 15th April 2021. In addition to this, Seaway Offshore Cables (SOC) and Sulmara may be trialling an autonomous survey vessel within the Hornsea Project Two array area which will be supported by a dedicated support vessel, queries related to this scope should be directed to SOC / Sulmara.

Works will be continual and intermittent throughout this period. The works will be undertaken by a number of vessels at different times according to the Project schedule. This Notice will be updated and re-issued when works are complete.

Note that the vessels will have limited manoeuvrability and it is requested that all vessels operating near the vessels maintain a safe distance (at least 500m) and pass all vessels at minimum speed.

 

 

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Triton Knoll Offshore Wind Farm - Confirmed UXO Targets



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


Please be 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

 

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Nearshore Pre-Cable Installation Works - Neart na Gaithe OWF



Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) are due to commence preparation works for the export cable installation, within the nearshore extent of the Export Cable Corridor. The works are due to commence on the 13th March 2021 at the earliest.


Two jack-up vessels, Capall Mara (MBSF3) and C57 Red Squirrel (J8B5722), will carry out a small amount of seabed preparation operations and undertake trenching works along a short section of the nearshore cable route.

The Capall Mara backhoe dredger will work along the two cables routes within the nearshore area, a first pass will be made where the vessel will reposition boulders between KP0.65 and KP1.4 followed by a second pass of each route where the vessel will excavate a trench within which the cable will be laid.

 

Excavated material will be temporarily repositioned to the side of the trench and will be backfilled by the Capall Mara once the nearshore cable installation is completed.

C57 Red Squirrel will work at KP0.65, to excavate two pits at the existing HDD exits and conduct minor construction works associated with the HDD exit point. The jack up vessel C57 Red Squirrel will arrive on site supported by two tugs, Forth Trojan (2FYM4) and The Battler (MGHD9).

A Crew Transfer Vessel, Celtic Guardian (21ZH5), will transfer personnel between the Capall Mara and C57 Red Squirrel and Eyemouth harbour each day. Celtic Guardian will also support with periodic minor surveys of the route. A dive vessel, CRC Tempest (MYUY7) will also work alongside the C57 Red Squirrel providing dive support associated with the minor HDD Construction works, as required.

Vessels are requested to remain at least 500 metres away from the Capall Mara and C57 Red Squirrel. Static fishing gear is requested to remain removed from the updated exclusion area

 

Area of Operations Mariners are advised that the Capall Mara and C57 Red Squirrel, alongside a number of supporting vessels, will be mobilised to work within the nearshore area of the NnG Export Cable Corridor' The nearshore exclusion zone will replace the existing exclusion area in place from the date of this notice.

Schedule The pre-enabling construction works are due to recommence on the 13th March 2021, at the earliest, and is expected to last approximately six weeks, until 30th April 2021, weather dependent. After this work, the preparation for cable installation will commence, in early May 2021, ahead of cable installation in June and July 2021. A further notice to mariners will be issued outlining the next phase in more detail.

Weather permitting, construction works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week) on the Capall Mara and on a daytime only basis (i.e. 12-hour working, seven days a week) on the C57 Red Squirrel.

 

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Cable Fault - BritNed HVDC Cable



Following the repair of a recent fault, another fault has developed, believed to be further to the east, since the repair was completed. Consequently, the safety zone is being extended to include the area of the new fault.


Following a recent fault (caused by impact damage) and subsequent repair to the BritNed HVDC Interconnector, the repaired section although trenched, is still in the process of natural backfill and areas of exposure remain. A guard vessel (currently M/V FORTUNA) remains on site. Another fault, still under investigation, has developed, believed to be further to the east, since the repair was completed. Consequently, the safety zone is being extended to include the suspected area of the new fault.

 

We wish to remind ship’s captains of the presence of subsea cables and request that extra caution is exercised when operating near charted cables in order to avoid any incident. Due to changing seabed conditions it should not be assumed that all cables are buried.

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Neart na Gaoithe Offshore Wind Farm - HDD Marine Works



Mariners are advised that Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) have completed the HDD supporting works within the nearshore extent of the Export Cable Corridor.


As part of the completed works, the two separate HDD ducts have been cut back to a level just above the seabed and capped in preparation for upcoming export cable works. The height of the end of the ducting above the seabed (stick-up height). Each HDD exit location has been marked temporarily by a surface marker buoy. As-laid positions of the marker buoys are also provided.

The next scheduled works are due to begin the week commencing 15th March 2021, at the earliest. A notice to mariners will be issued in advance of these works, to notify of the start date.

 

 

 

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Deployment of Buoys - West Gabbard



Recording oceanographic equipment has been moored at West Gabbard


There are a Smart Buoy and 2 yellow, Class 2 Guard Buoys carrying radar reflectors at the site.

All three buoys are fitted with a yellow light exhibiting the sequence FI Y (5) 20s.

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Deployment of Buoy - Blyth Met Mast



Fugro have now completed planned SeaWatch LiDAR Buoy (SWLB) deployment and recovery operations in the vicinity of the Blyth Met Mast.


The SWLB referred to as WS180 has been recovered from the location south-east of the met mast and the SWLB referred to as WS155 has now been deployed on site to the north-west of the met mast. Exact locations are provided. The deployment location is within the UK Sector of the North Sea off the coast of Blyth, Northumberland.

The equipment will be deployed close to the Blyth Met Mast as part of a validation study within the existing met mast 250 m consent zone and will be deployed for a minimum period of 3 months.

Scheduled maintenance is not planned due to the short deployment duration, but unforeseen maintenance may be required.

The equipment will be moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.

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Installation of temporary marker buoy - as laid position



A Yellow Special Mark has been installed marking an exposed pipe


A temporary marker buoy has been positioned at the North of the end of the exposed duct shown in Fig 2 on the attached NtM (the highest point above sea level). The exposed duct protrudes approximately 20m from the seabed. The highest point is approximately 2.4m above seabed level or 6.5m below surface at LAT.

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Exposed Cables - Galloper Offshore Wind Farm



Update from most recent subsea survey. There is evidence of sections of cable exposure in ten areas over seven cable routes of the Galloper windfarm. Locations noted below


 

Area Start  Stop
D1J - E2J 51°48.489'N 002°02.339'E 51°48.489'N 002°02.341'E 
E3H - E4H 51°55.322'N 002°01.231'E 51°55.322'N 002°01.224'E
E4H - E5H 51°54.568'N 002°01.180'E 51°54.565'N 002°01.176'E
OSP - D3A 51°57.151'N 002°01.879'E 51°57.127'N 002°01.876'E
OSP - F3C 51°57.455'N 002°02.816'E 51°57.472'N 002°02.141'E
OSP - F3C 51°57.508'N 002°02.564'E 51°57.513'N 002°02.587'E
OSP - F4E 51°57.100'N 002°02.148'E 51°57.100'N 002°02.150'E
OSP - F4E 51°57.101'N 002°02.462'E 51°57.101'N 002°02.462'E
OSP - F6G 51°56.400'N 002°01.586'E 51°56.399'N 002°01.587'E
OSP - F6G 51°56.369'N 002°02.200'E 51°56.369'N 002°02.200'E

 

There is no cable exposure evident in the South Field of the windfarm.

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Cone Penetration Testing and Vibrocore Sampling at Dogger Bank A, B, C Windfarm



This notice to mariners (NtM) relates to cone penetration testing and vibrocore sampling on DBA, DBB, DBC wind farm array areas and Export Cable Corridors.


The Wilson Adriatic will be performing cone penetration testing and vibrocore sampling and will be stationary on locations for up to approximately 4 hrs.

The cone penetration testing and vibrocore sampling is expected to commence at midnight on 5th March, 2021 and conclude at midnight on 31th June, 2021 using the vessel Wilson Adriatic. Works are planned to commence in the DBC wind farm array area.

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Inter Array Cable Burial works - Moray East Wind Farm



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are carrying out Inter Array Cable (IAC) burial works within the bounds of site


The cable trenching (post lay burial) will be completed by tracked- on bottom trenching tools. WROV surveys will be conducted once the cable is buried.

 

Two trenching support vessels ,Grand Canyon 3 and the Boskalis Ndeavor, will be completing operations on the cable routes identified in Figure 2.

 

Both vessels will complete launch and recovery operations of the trenching tools, and will be restricted in their ability to manoeuvre during trenching and WROV operations.

 

The overall work scope will be carried out in 2 campaigns – Campaign 1, commencing 07/11/20 to 03/01/20 and Campaign 2, commencing 20/03/21 to 12/05/21.

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Galloper Windfarm - Defect of the Cable Protection System (CPS) inter-array cable GS-A1L



A recent ROV inspection at Galloper to assess the subsea structure of inter-array cable A1L identified a defect of the Cable Protection System (CPS) on top of the existing scour protection around the wind turbine foundation, at the point of burial.


A recent ROV inspection at Galloper to assess the subsea structure of inter-array cable A1L identified a defect of the Cable  Protection System (CPS) on top of the existing scour protection around the wind turbine foundation, at the point of burial.

 

Asset Location  GS-A1L 51° 43,972' N 1° 58,174' E 

 

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.’   https://kis-orca.org/safety/the-risks-of-fishing-near-cables-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. 

 

An updated NtM will be issued once the remedial works is confirmed and scheduled 

 

Mariners are requested to remain a distance of 50m2 away from GS-A1L, 51° 43,972' N 1° 58,174' E, until remedial works have been carried out.  

 

Temporary exclusion area as per the below drawing.   

 

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Sound measurement study - Hywind Scotland Pilot Park



Hywind Scotland Pilot Park is performing a sound measurement study where the purpose is to document the operational noise. Successful retrieval of control sound recorder performed January 24. Failed retrieval of the sound recorder in wind park.


Update February 5:

Successful retrieval of control sound recorder performed January 24. Failed retrieval of the sound recorder in wind park.  A second attempt for retrieval of the sound equipment in the Hywind Scotland Pilot Park is being planned. The notice is prolonged and the location of the retrieved control equipment is removed from the notice.

-----

As part of the Hywind Scotland Wind Park, Equinor has subcontracted Jasco Applied Sciences to perform sound recordings in the park area and in a control location in Buchan Deep (near cross over point between the FORTIES to CRUDEN Bay oil line and the GAS line).

 

The purpose of the sound measurement study is to document the operational noise from floating offshore wind turbines and their substructures, mooring lines and cables. It is part of an internal Equinor Research &Technology project that aims to increase knowledge on possible environmental implications of floating offshore wind, i.e. in this particular study, the possible impact ranges of sound from the wind park on marine mammals and fish. The results from the sound measurement study is important also for further technology development.

 

The Equinor contracted “MCS Swath1” (crew vessel) will be used for the deployment and retrieval of the sound recorder equipment (hydrophones). The field activity in connection with both deployment and retrieval will take one day, however, the recording period will be approximately 3 months from ultimo October 2020 to ultimo January 2021.

 

The recorders were deployed October 21. Yet, no exact date is set for the retrieval of the equipment (ultimo January 2021).Activity prolonged.

 

All Equinor installed equipment shall remain in position for the duration of the survey, but all equipment will be removed from seabed when the recording period is over. Also, there will be no bouys on sea surface or lines in the water column. All equipment will be placed on sea floor at approximately 100 meters depth by the help of an anchoring plate, which fastens the equipment and eliminates drifting of equipment. The equipment will have a height of maximum 1 meter above seabed, and the plate mooring system has the dimension 914 x 527 x 864 mm.

 

This equipment collects data and information of environmental importance and could get damaged or lost if trawled over.

 

When the equipment is retrieved, the acoustic release will be activated and the equipment will be lifted by crane.

 

 

Positions for recorders in wind park  (The Control was retrieved January 24 2021 and location is removed from the map in the active notice.)

 

Location

Latitude

Longitude

Easting (m)†

Northing (m)†

Hywind Scotland

57° 29' 04.2741" N

1° 20' 33.8512" W

599357.410

6372534.418

Control

57° 31' 48.0000" N

1° 07' 33.6000" W

612209.809

6377933.954

 

 

 

Vessel Specification

 

Details of the vessel MCS Swath1 can be seen via the following document.

 

https://www.maritimecraft.co.uk/files/MCS-SWATH-1.pdf

 

According to information in the specification, a deck crane of load 500 kgs is installed. The crane and a mobile winch will be used to deploy and retrieve sound recording equipment.

 

 

 

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Lost CPT rod - Eastern Link 1



During CPT operations a CPT rod broke and was lost to the seabed. The rod is made of steel and is 3.6cm in diameter. It is estimated that 0.75m of rod is protruding above the seabed.


The cone and friction rod were also missing at recovery and are most likely curried under the seabed. These are also made of steel with the same diameter. The cone is 35cm long and the friction rod is 30cm long. 

 

There may be a minor risk to trawler’s fishing gear if they trawl over this location, however, it is more likely that any trawling gear would break the rod below the seabed.

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Triton Knoll Offshore Wind Farm - Navigation Warning



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.


Mariners are advised that the remnants of a Wave Rider Buoy sinker weight and partial rigging remain in position at:

 

Latitude Longitude Water Depth (LAT)
53° 30.442N 000° 50.564E 19.7m

 

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.

***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.
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Completion of Explosive Ordnance - Hornsea Project Two



Mariners are advised that the Explosive Ordnance Detonation (EOD) phase for the pre-construction stage of Hornsea Project Two is now completed.


Hornsea Project Two confirms the presence of 7 Unexploded Ordnance (cUXO) and 2 suspected UXO (sUXO) which remain undetonated within the Hornsea Project Two Wind Farm area. There are no plans to clear these remaining UXO.

All vessels are requested to maintain the required safe distances as defined from the coordinates

 

It should be noted that ongoing seabed preparation for construction, as well as construction activities themselves, may identify further UXO which may need to be cleared from the site. Separate notices will be issued in this case.

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Dropped drill pipe and collars (2,300kg / 33 metres)



Fugro has reported the loss of 33 metres of drill pipe, weighing a total of 2300kg from the MV Normand Flower whilst working on East Anglia 1 North wind farm. It is not known whether the item is sticking up above the seabed at this stage.


Dimensions of object: ~33 m of steel drill string consisting of: 4 X Drill Collars (each ~4.5 m long, ~8 inch diameter and ~500 kg in weight) 1 X API Drill String ~9 m long, 4.5 inch diameter and ~300kg weight

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Dropped Anchor - Gwynt y Mor Offshore Wind Farm



The original anchor consisting of approximately 350kg of scrap chain at the previously as laid position:53°28.615 N 003°30.192 W could not be recovered and remains on the sea bed.


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Exposed Cable - Beatrice Offshore Windfarm



Rock Replacement Operations on a short area (4m) of partial exposure of Export Cable EC2 is in the vicinity of the mid cable joint at the location where the cable changes direction. Vessel MV Olympic Artemis Call sign: LAFV8. Work Commencement date TBC.


ROn behalf of Beatrice Offshore Windfarm Ltd, MV Olympic Artemis Call sign: LAFV8 will deploy rock bags over a four-metre section of exposed export cable.

 

Work Commencement date TBC.

 

During this operation the MV Olympic Artemis will be restricted in its ability to manoeuvre and will be displaying the appropriate lights and day signals. All vessels are there for requested to give a wide berth when passing.

 

At present the MFV Reaper is acting as a guard vessel at this location, further information is available in previously issued Beatrice notice to mariners NTM-BE-00005 - Export Cable Guard Vessel. MFV Reaper will remain on location throughout operations until the partial exposure has been proven to be satisfactorily covered.

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Relocated Unexploded Ordnance - Neart na Gaoithe Offshore Wind Farm



Following unsuccessful clearance activities at some of the confirmed Unexploded Ordnance (UXO) items, six UXOs have been relocated to date within the Neart na Gaoithe (NnG) Offshore Wind Farm and Export Cable Corridor.


These UXO items either do not contain a fuse or are confirmed as solid shots and clearance by detonation is not likely to be possible. As such, relocation of the item is necessary. The item will be relocated to a position outwith the construction areas, but within the boundaries of the NnG licensed area, as permitted by the Marine Licence.

 

Latitude Longitude Target
56°14.752’N 02°18.472’W G_MAG_0029
56°14.760’N 02°18.474’W G_MAG_0010
56°14.154’N 02°14.886’W E_MAG_0683
56°13.677’N 02°18.681’W ERC_O_MAG_0332_A
56°14.955’N 02°17.445’W E_MAG_0068
56°14.953’N 02°17.437’W E_MAG_0070
56°14.607’N 02°17.618’W E_MAG_0036
56°15.399’N 02°19.521’W G_MAG_0109
56°14.766'N 02°17.025’W E_MAG_0227
56°14.131’N 02°18.011’W E_MAG_0008
56°14.568’N 02°18.617’W E_MAG_0018
56°15.875’N 02°14.986’W C_MAG_0070
56°13.739’N 02°18.685’W ECR_O_MAG_0362_A
56°13.784’N 02°18.671’W ECR_O_MAG_0378
56°02.740’N 02°21.208’W ECR_M_MAG_0708
56°17.788’N 02°16.833’W B_MAG_0200

 

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Cable Repair - GTT Segment C



Following cable repair, cable exposed due rocky seabed conditions GTT Guard vessel is patrolling the area to promote awareness of the hazard to fisheries


Notice to fisheries and seabed users in the Irish Sea:

 

Please be advised that following a recent cable repair to the GTT (Hibernia) Segment ‘C’ between Southport and Dublin, the cable has been deployed as follows:

 

Initial Splice:        53° 48.3613’N    04° 30.1514’W

Standing bight:   53° 48.2208’N    04° 29.4494’W

Final Splice:         53° 48.1279’N    04° 28.2360’W

 

It should be noted that throughout the extent of the cable repair, despite repeated attempts at post lay burial by an ROV, the predominantly very rocky seabed has meant that cable burial and hence protection has not been possible.

 

It should also be noted that at the position of the ‘standing bight’ the cable is standing upright from the seabed at a height of 0.4 metres, with a length over the ground of 2.0 metres.

 

All seabed users are requested not to deploy equipment which engages with the seabed in this area, to avoid snagging of the cable and particularly so, at the standing bight area.

 

In case of any issues, please do not hesitate to contact the GTT Hibernia emergency contact number on: +353 1 867 3600 Option 2

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Dropped Object - Hornsea Two Offshore Wind Farm



Noise monitoring frame(steel 1m3 frame approx. 40kg), hydrophone,riser buoy,clumped(100kg chain clump weight) & 50m Dyneema riser line(dia.~25 mm)remain after the riser line was severed below the surface buoy.Surface marker buoy and pellet buoy recovered.


The riser line was severed below the surface buoy and it has not been possible to recover the items. Investigations as to the cause of the loss are ongoing.

 

Possible risk of entanglement from remaining riser line.

 

The SONAR imagery acquired during the recovery attempt indicated the riser line (the main aspect of concern) to be still attached to the anchor weight and suspended in the lower part of the water column. Given the elapsed time, the line will be fully saturated and neutrally buoyant and fully submerged. It is anticipated that the action of tidal currents on the line will cause it to knock down and eventually become entangled in the frame and other gear. Whilst it has not been confirmed, it is unlikely that the line would remain close to the surface.

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WTG Installation and Commissioning - Moray East Windfarm



WTG Installation and Commissioning installation on the Moray East windfarm


Please be advised that Moray Offshore Windfarm (East) shall commence WTG installation on the previously installed jackets (Figure 2). WTG’s will be installed by the JUV Bold Tern. Once the WTG’s have been installed Acta Centaurus will transfer teams of technicians using a walk to work system to carry out commissioning works in readiness for energisation. Acta Centaurus will be supported by 2 CTV’s (HST Harri and Windcat 40). Installation and commissioning works will commence circa 05th January 2021 until completion

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Deployment of Buoys - Hornsea Project Two



Ørsted have relocated a 'measurement buoy', as well as two 'transponder buckets' as part of construction of the Hornsea Project Two Offshore Wind Farm.


The devices have been placed within the Order Limits of the Hornsea Project Two offshore wind farm.

 

Note that these devices will remain on location throughout construction of the Hornsea Project Two Offshore Wind Farm and mariners should take note of their presence.

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Lidar Deployment - East Anglia Two Wind Farm



SeaWatch LiDAR Buoy (SWLB) has now been redeployed at the East Anglia TWO wind farm site. The SWLB is a sea state measurement instrument. The buoy has been recovered from site leaving some mooring components and the anchor weight on the seabed.


The equipment was deployed by the vessel Afon Wen on 28 November 2020. Grappling operations were also conducted on site and the majority of an old mooring remaining on the site were recovered from the location; the only remaining items on the seabed are an anchor weight, a short length of chain and approximately 10 m of dyneema rope. No further scheduled maintenance is planned on this project, although unforeseen maintenance may be required.

The mooring design is specific to each SWLB deployment and location. The equipment is moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.

The equipment is deployed within the East Anglia TWO wind farm array limits and will be deployed for approximately twelve months from July 2020.

 

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Wreck - H17 Wreck Archaeological Exclusion Zone



A known wreck lying to the south of London Array WTG H17 has become exposed. An archaeological Exclusion Zone (AEZ) already exists to protect this known wreck. Marine users are requested to maintain a safe distance around this wreck and current AEZ.


Further surveys are planned in 2021

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Anchor Weight Chain 800kg - East Anglia One



There is most likely an anchor weight remaining on site. This is a bundle of approx. 800kg scrap anchor chain. Dimensions of object: Wave buoy mooring consisting: Anchor chain bundle: approx. 1.5 m x 2 m x 1 m


There is likely <0.5m presence of the anchor at the seabed so no risk to navigation is perceived.

 

There is a small potential for entanglement with fishing gear should trawling be undertaken in the area should equipment remain on seabed surface. No navigational risks are perceived.

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Havhingsten Cable Project - North Sea



Prior to rock placement there is a maximum of 50m of cable surface laid at each of the 4 crossings. It is advised that extra care is taken when vessels are operating near these areas and that no vessel should trawl within 250m from.


Please be advised that, installation of the Havhingsten fibre optic telecommunication cable system is complete outside of 12nm within the North Sea and at the Seaton Sluice landing. The Whitley Bay stub works are scheduled for March 2021.

 

The supplier of the Havhingsten cable is Alcatel Submarine Networks (ASN). Intertek are the environmental and permitting consultants.

 

The entire cable system will comprise marine elements that pass from Denmark to the UK (NE region); from the UK (NW) to the Republic of Ireland; with two segments being installed into landfalls on the Isle of Man. 

 

The cable route in the NE region is shown below. Landfall was made at Seaton Sluice.

 

Installation was via industry standard burial tools including water jetting and ploughing. Cable burial has been performed to a target of 2m.

 

The Havhingsten cable crosses 4 pipelines within the UK North Sea, which will require external rock protection. Post-rock installation is now expected in March 2021. The cable crossings start at approximately 72km offshore and beyond.

 

Prior to rock placement there is a maximum of 50m of cable surface laid with Uraduct protection at each of the 4 crossings. Coordinates of the crossings are provided in the table below. It is advised that extra care is taken when vessels are operating near these areas and that no vessel should trawl within 250m from the listed coordinates.

Crossing

Approximate distance offshore (km)

Latitude

Longitude

CATS

72

55°15.8028’ N

000°21.9318’ W

Norpipe

113

55° 19.1679’ N

000° 16.0266’ E

Sleipner to Easington

140

55° 22.3375’ N

000° 40.9323’ E

Shearwater to Bacton

198

55° 30.7194’ N

001° 34.1236’ E

 

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Dropped Anchor Weight and Mooring



Anchor weight and mooring from lidar buoy, composed of approx 2250 kg scrap anchor chain, 19mm chain, 20 mm dyneema rope. Dimensions of object: Approx. 2.5 m2 (w) and 1 m height.


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Construction of Wind Farm (Neart na Gaoithe)



Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) will commence construction work for Neart na Gaoithe (NnG) Offshore Wind Farm, from the 9th August 2020, with the start of casing and pile installation operations on the wind farm site.


NnGOWL is developing the NnG Offshore Wind Farm, jointly owned by EDF Renewables and ESB, which is located in the outer Firth of Forth, Scotland. The NnG wind farm area is 15 km east off Fife Ness and 29 km from the East Lothian coastline and covers an area of 105 km2

The wind farm consists of 54 no. wind turbines (WTGs) and 2 no. Offshore Substation Platforms (OSPs), with a total capacity of approximately 45 0MW. Water depths across the offshore wind farm area generally range from 40 to 60 m below LAT. The generated power will be transmitted to the grid via two subsea export cable circuits which will reach landfall at Thorntonloch Beach, East Lothian, Scotland. Specific details and location of activities within the Wind Farm Area and Export Cable Corridor will be provided via subsequent notices as work progresses.

 

Buoyage

 

Five special markers are now in position:

 

Name Location

SP 1 - Special Mark - Fl Y 5s light character

56°18.180'N 02°12.075'W

SP 2 - Special Mark - Fl Y 5s light character

56°15.643'N 02°09.329'W

SP 3 - Special Mark - Fl Y 5s light character

56°12.294'N 02°15.796'W

SP 4 - Special Mark - Fl Y 5s light character

56°14.038'N 02°18.975'W

SP 5 - Special Mark - Fl Y 5s light character

56°18.924'N 02°18.951'W

 

Four cardinal buoys are due to be deployed the week commencing 16th March. Planned deployment locations

 

Name Location

NNG - North Cardinal - Quick (Q) white light character

56°20.425'N 02°14.617'W

NNG - East Cardinal - Q (3) 10 s white light character

56°14.329'N 02°08.558'W

NNG - South Cardinal - Q (6) + Long (L) FL 15 s white light character

56°12.294'N 02°09.760'W

NNG - West Cardinal - Q (9) 15 s white light character

56°17.057'N 02°21.084'W

 

A steel chain will be connected to each marker buoy, and the chain will be present through the water column, connected to an anchor placed on the seabed.

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Deployment of Buoy - Neart na Gaoithe Offshore Wind Farm



Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) successfully deployed a Wave Rider Buoy (WRB) within the Wind Farm Area on 12th Sept 2020. The intention is that this buoy will remain in situ within the NnG Wind Farm site for up to 2 years (Sept 2022)


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Dropped Cylindrical Pipe



Material is smooth cylindrical pipe drill casing. Dimensions of object: 12.2m x 0.2m presumed to be laying horizontal / sub-horizontal on the sea bed. May present some ‘snagging’ risk to fishing gear or similar. Planned Recovery of Item.


Details of any radio Navigational Warnings and/or Notices to Mariner’s:

 

  • None as yet, but geotechnical spread remains at site and in a position to guard and notify as required.
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Floating LiDAR System - Seagreen Alpha and Bravo windfarms



Seagreen Wind Energy Limited has replaced the Floating LiDAR System (FLS) at the location shown


The replacement FLS was deployed on the boundary of the Seagreen Alpha and Seagreen Bravo offshore wind farms in the Firth of Forth Offshore Wind Round 3 Zone off the east coast of Scotland. The replacement FLS is approximately 600m to the south-west of the previous location.

 

The FLS buoy will remain deployed for up to 1 additional year from this date. Service visits will occur at approximately 3-month intervals over this period.

 

The FLS is buoy mounted and is moored using 150 m long DIN 5683-II mooring chain Ø26 x 234 mm and 3 tonne concrete anchor. The buoy is powered by solar panels and micro wind turbine generators. The buoy is yellow (RAL 1023) in colour and will be clearly marked with two navigation lights (flashing amber, 5 flashes every 20 seconds, nominal range 3-6 nm visibility). The buoy is fitted with a Radar reflector. A service vessel will be on station for approximately four hours during service and recovery visits. Other vessels should maintain a safe distance when passing the vessel and should pass at lowest possible speed to avoid vessel wash effects.

 

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Exposed Subsea Cable - Apollo South



On behalf of Apollo SCS Ltd, fishermen are advised that following a repair to the Apollo South subsea telecoms cable there now exists a section of exposed/unburied cable.


Due to the nature of the seabed in this area the cable may be exposed and could be a hazard to fishing. Fishermen are asked to ensure that they have the route of the Apollo South cable accurately plotted on their fishing charts. Trawler skippers are respectfully asked to exercise caution when trawling in the vicinity of the Apollo South cable and to keep beyond a distance of at least 500 metres from the charted cable route and, where at all possible, to avoid trawling directly over the cable route. Static gear fishermen are advised not to deploy anchors and end weights in close proximity to the cable.

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Clump Weight - Triton Knoll Offshore Windfarm



A 500kg clump weight made from scrapped anchor chains has been dropped


Dimensions of object:

  • Various lengths of anchor chain (max 1.3mtr)
  • Held together by steel sling and shackles
  • Total mass ±500kg
  • Connected is a white polyprop line - ± 25-30mtr in length with sinker at end.
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Deployment of Buoys - Neart na Gaoithe OWF



Neart na Gaoithe Offshore Wind Limited (NnGOWL) have completed the deployment of four Cardinal buoys around the Neart na Gaoithe Offshore Wind Farm site.


The marker buoys will remain in place until the construction of Neart na Gaoithe Offshore Wind Farm is complete.

 

Name Coordinates
NNG N - North Cardinal - Quick (Q) White light character 56°20.424'N 002°14.616'W
NNG E - East Cardinal - Q (3) 10s White light character 56°14.329'N 002°08.557'W
NNG S - South Cardinal - Q (6) + Long (L) FL 15s White light character 56°12.293'N 002°09.760'W
NNG W - West Cardinal - Q (9) 15s White light character 56°17.057'N 002°21.083'W

 

The buoys will be deployed for the duration of the construction of Neart na Gaoithe Offshore Wind Farm. The buoys will be inspected and maintained at least every 12 months.

 

There are currently two Guard Vessels present on site, which will be on site for the duration of the Neart na Gaoithe Offshore Wind Farm construction period. The guard vessel is either:

  • Artemis, call sign MVIX5;
  • Tranquillity S, call sign MJUH9 or
  • Seagull, call sign MVBO2.
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Coils of Steel Rope - Neart Na Gaoithe Offshore Wind Farm



The Glomar Wave has discovered two seabed hazards, within the boundaries of the Neart na Gaoithe Export Cable Corridor. A 50-metre exclusion zone is requested around each of the following locations for safety reasons, until they can safely be removed.


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Exposed Cable Sections - EirGrid East West Interconnector



Following a recent marine survey along the route of the EirGrid East West Interconnector power cable, is was found that the cable is currently exposed at two locations within UK 12-mile territorial waters fishery limit off the North Wales coast.


In the interests of maritime safety, mariners/fishermen are advised not to anchor, trawl or deploy bottom contact fishing equipment in the vicinity of the EirGrid East West Interconnector power cable route and within the boundary box of the exposed cable sections as detailed.

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Cable spans



Surveys at Greater Gabbard show that there are 8 free-spans which are listed below.


Location

Span Length (m)

Span Height (cm)

Start of Span

End of Span

L1 cable

6

0

52° 12.284'N 001°39.364'E

52°12.283'N 001°39.369'E

L1 cable

8

13

52° 12.271'N 001°39.434'E

52°12.270'N 001°39.441'E

L1 cable

8

20

52° 12.064'N 001°40.559'E

52°12.061'N 001°40.565'E

L2 cable

15

5

52° 12.128'N 001°40.524'E

52°12.124'N 001°40.535'E

L2 cable

8

76

52° 12.119'N 001°40.560'E

52°12.118'N 001°40.567'E

L3 cable

3

11

52° 12.169'N 001°40.502'E

52°12.169'N 001°40.504'E

L3 cable

13

34

52° 12.148'N 001°40.594'E

52°12.146'N 001°40.604'E

L3 cable

17

10

51° 59.194'N 001°57.431'E

51°59.187'N 001°57.442'E

 

Whilst the results continue to be processed, Balfour Beatty have asked that in the interest of safety and the integrity of the cable, extreme caution be used when Fishing near the export cables and that Fishermen refrain from using towed gear across the export cables wherever possible.

 

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Exposed sections of cable



Surveys at Gunfleet Sands offshore wind farm have illustrated that some array/in-field cables are lying exposed on the seabed and are no longer buried and there is one freespan. These may represent a hazard to fishing.


These are the following cables located in the eastern part of Gunfleet Sands 1 and the north eastern part of Gunfleet Sands 2.

 

Location

Exposure Length (m)

Start of Exposure

End of Exposure

Between turbines C06-D06

4

51°44.447'N 01°15.045'E

51°44.445'N 01°15.046'E

Between turbines F06-F07

23.7

51°44.204'N 01°16.057'E

51°44.209'N 01°16.076'E

Between turbines F07-F08

78.4

51°44.471'N 01°16.744'E

51°44.448'N 01°16.688'E

Between turbines F08-F09

851.7

51°44.485'N 01°16.777'E

51°44.726'N 01°17.398'E

Between turbines G06-G07

21.7

51°44.008'N 01°16.270'E

51°44.002'N 01°16.255'E

Between turbines G07-G08

21.9

51°44.273'N 01°16.948'E

51°44.267'N 01°16.932'E

Between turbines G08-G09

20.7

51°44.276'N 01°16.953'E

51°44.280'N 01°16.969'E

Between turbines G08-G09

16.6

51°44.522'N 01°17.591'E

51°44.527'N 01°17.603'E

 

There is a freespan at the following array Cable Position:

 

Location

Exposure Length (m)

Start of Exposure

End of Exposure

Between turbines C06-D06

4

51°44.447'N 01°15.045'E

51°44.445'N 01°15.046'E

 

 

 

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Exposed cable and lost fishing gear



Exposed section of cable and lost fishing gear.


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Exposed Cable Section (SHEFA)



There is an exposed section on the SHEFA cable coming out of Orkney between the two positions below.


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