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Scottish Hydro Electric Power Distribution (SHEPD) Marine & Freshwater Subsea Inspections – 2022



Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea and freshwater inspections of several cables within a defined corridor.


Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea and freshwater inspections of several cables within a defined corridor.

 

Given the different conditions and water depths anticipated at each site, a range of vessels will be utilized across the project. The inspection works will be centered on a 50m cable corridor.

 

Survey operations at these locations are expected to commence in October 2022, with start dates and anticipated durations given in the attached NtM.

 

VESSEL DETAILS

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

 

The vessels conducting these inspections 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 the attached NtM.

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NEP Geophysical survey (UXO and Seismic)



SafeLane Global has been requested by Lankelma to support the development of the Northern Endurance Partnership (NEP). This stage of the project requires marine geophysical surveys for Teesside, Redcar. In order to do this SafeLane will carry out a marine nonintrusive UXO survey and seismic survey to provide information on potential UXO and thickness of drift deposits, the position of bedrock and possible fault zones for targeting subsequent intrusive boreholes.


The survey area is on the UK Northeast Coast, Teesside is approx. 1500m x 500m

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NEP Geophysical survey (UXO and Seismic)



SafeLane Global has been requested by Lankelma to support the development of the Northern Endurance Partnership (NEP). This stage of the project requires marine geophysical surveys for Humberside, Easington. In order to do this SafeLane will carry out a marine non-intrusive UXO survey and seismic survey to provide information on potential UXO and thickness of drift deposits, the position of bedrock and possible fault zones for targeting subsequent intrusive boreholes.


The survey area is on the UK Northeast Coast, Humberside is approx. 800m x 400m

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NEP Project - Deep Geotechnical Borehole Investigation



The Kommanor Susan (Gardline Operated) will be undertaking borehole operations for the NEP project. The scope shall complete three (3) locations; 2 at the Endurance store area and 1 located approximately 5km offshore from Redcar. Each location is expected to drill to approximately 35m below the seafloor, the vessel will be stationary for up to 2 days at each location.


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Metocean Survey - West of Orkney Offshore Windfarm



The survey will commence on the 14 October 2022 and run through to 31 October 2023 using the vessel Green Isle. The total duration for survey activity is expected to take 375 days, and additional days have been included in the duration to account for unforeseen operational and/or weather delays.


Contact details:

  • Onshore FLO: phone: +44 (0) 7926418820, email: OWPLFisheries@xodusgroup.com;
  • Offshore: T: +44(0)1856 851966 (office) M: +44(0)771 056 2605 (mobile)

 

  • Name of vessel carrying out the work and equipment used: Green Isle
  • Two floating Light Detection and Ranging (LiDAR) Systems (FLS);
  • One Wave Buoy; and
  • One Acoustic Doppler Current Profiler (ADCP).
  • Port of operation: Stromness, Scotland
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Geophysical surveys at Moray East Wind Farm Site



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake geophysical surveys along inter-array cables within the Moray East Wind Farm Site and export cables along the cable corridor (OfTI boundary)


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake geophysical surveys along inter-array cables within the Moray East Wind Farm Site and export cables along the cable corridor (OfTI boundary) (see Figure 1). These activities will be undertaken using the Green Storm survey vessel. The survey will take place from the 27th to 30th of September 2022 at the export cable, and from the 15th September to 10th October 2022 for the interarray cable within the wind farm, subject to weather conditions.

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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. Post-installation commissioning and repair activity is continuing and it is anticipated that construction vessels required for repair work will be returning to site occasionally in early 2022 and further notices will be issued accordingly.


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
Seacat Courageous Crew Transfer Vessel 2IDC9 235108711 9758052 Grimsby 01/05/2022
Cerys Line Utility Vessel - Subsea Surveys MGMR5 232025503 8228842 Grimsby 13/06/2022

 

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

 

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 Service and maintenance continues infield

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 Service and maintenance continues infield.

*** 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.

 

Local Notice to Mariners Recently

NtM 001-2022 (24th January 2022)

NtM 002-2022 (28th January 2022)

NtM 003-2022 (08th March 2022)

NtM 004-2022 (09th March 2022)

NtM 005-2022 (14th March 2022)

NtM 006-2022 (30th March 2022)

NtM 007-2022 (7th April 2022)

NtM 008-2022 (7th April 2022)

NtM 009-2022 (10th April 2022)

NtM 010-2022 (19th April 2022)

NtM 011-2022 (04th May 2022)

NtM 012-2022 (04th May 2022)

NtM 013-2022 (06th May 2022)

NtM 014-2022 (06th May 2022)

NtM 015-2022 (13th May 2022)

NtM 016-2022 (18th May 2022)

NtM 017-2022 (08th June 2022)

NtM 018-2022 (22nd June 2022)

NtM 019-2022 (30th June 2022)

NtM 020-2022 (11th July 2022)

NtM 021-2022 (11th July 2022)

NtM 022-2022 (03rd August 2022)

 

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
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Dogger Bank A IAC Pre-Lay Grapnel Run (PLGR)



The Multifunctional Anchor Handling Tug (AHT) with DP1, BB OCEAN, will perform the first campaign of the Pre-Lay Grapnel Run operations in Dogger Bank A OWF Inter Array Cable Array Area.


This campaign will commence on the 12th of October 2022 and continue until approximately 15th of November 2022. The works will be continuous, 24 hours a day. Charts of the DBA array area are provided below. The operations include a single pre-lay grapnel run over the centre of part of the array cable routes prior to IAC installation by means of a grapnel train to mitigate the risk of encountering subsea obstructions such as discarded fishing gear, wires, etc. During operations, the BB OCEAN 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 1.5Nm separation distance from the AHT 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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Subsea Foundation Inspection - Moray Offshore Windfarm (East)



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence subsea Remotely Operated Vehicle (ROV) foundation inspections at all locations within the bounds of Moray East Offshore Windfarm on the 1st April 2022 for 130 days. This includes scour visual inspections at all jackets, and Cable Protection Systems entering substructures at selected locations. The area of Operation is shown in Figure 1 below and will be carried out using the Dalby Ribble


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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:

 

Foundation Installation       

The Offshore installation vessel, HLV Seaway Strashnov, will install monopile foundations, within the Dogger Bank A construction area. The works will commence on the 28th of September 2022, continuing until approximately Q3 2023 The works will be continuous 24 hours a day.

 

 A running list of the next locations to be installed and completed foundation locations will be presented in the Weekly Notice of Operations.

 

 

For further details of current offshore construction activities, please contact the people below or see attached Weekly Notice of Operations.

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2 x Floating Lidar Metocean Buoy Deployments - NOAH Met Mast, Blyth



Partrac has two Floating LiDAR FLS200 buoys deployed in close proximity to the NOAH Met Mast, 3nm off the coast of Blyth. Partrac is planning to recover one LiDAR buoy (E03), and service the second LiDAR buoy (E13) which will require maintenance in Port of Blyth followed by redeployment. The works are scheduled to be carried out from 04/10/22 using the vessel Isle of Jura, weather permitting. During recovery operations the two LiDAR buoys will be lifted onto the back deck of the vessel.


METOCEAN BUOY

 

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.

 

The surface buoys will include: A day shape of yellow St Andrews Cross; radar reflector; and yellow navigation light.  The light will have a flash sequence 5Fl(20s).

 

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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.’

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R100 Seg 2.03a - Notification of surface buoys



Please be advised that the R100 Seg 2.03a telecommunication cable has been wet stored and fitted with two AIS buoys. The removal of these buoys will be dependent on weather however they are likely to be removed within 1 week.Vessels should maintain a distance of at least 250m from the deployed buoys. Please distribute this information accordingly so that other sea users are aware.


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UXO geophysical surveys within the EA HUB Offshore Wind Farm area



Scottish Power Renewables UXO geophysical surveys within the EA HUB OWF area. Scottish Power Renewables (SPR) has contracted Fugro GM Marine Limited (Fugro) to carry out UXO surveys located on their site east of Lowestoft, United Kingdom, in the southern North Sea and covers an area of approximately 5,900 km2 for the East Anglia HUB offshore windfarm.


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Survey - Norfolk Offshore Wind Farm



Please be advised that Fugro will be undertaking a geophysical and geotechnical site survey on behalf of Vattenfall Wind Power over the Norfolk future wind farms in the North Sea.


The M/V Fugro Discovery will be deployed over the survey area starting on or around the 01.08.2022 until mid-October 2022. The MV Fugro Discovery will be conducting offshore geophysical survey activities using MBES, SBP, SSS (towed) and MAG (towed). Other vessels should maintain an appropriate and safe distance of 500 m, where possible, when passing the survey vessel(s) whilst undertaking survey operations and should pass at the lowest possible speed to avoid vessel wash effects. 

 

The M/V Normand Mermaid will be deployed over the survey area (Norfolk Boreas and briefly Vanguard West area) starting on or around the 15.09.2022 for three weeks. Vessel shall deploy and retrieve seabed equipment on each investigation location where it will remain stationary for a period of 2-12 hours.

 

The M/V Gargano will be deployed over the survey area (Norfolk Boreas and briefly Vanguard West area) starting on or around the 03.10.2022 for three weeks. Vessel shall be drilling on each investigation location where it will remain stationary for a period of 8-24 hours.

 

The M/V Kommandor Orca will be deployed over the survey area (Norfolk Boreas and briefly Export Corridor area) starting on or around the 03.10.2022 for eight weeks. Vessel shall deploy and retrieve seabed equipment on each investigation location where it will remain stationary for a period of 2-12 hours.

 

The M/V Fugro Pioneer and the M/V Fugro Frontier will be deployed over the survey area (OSS locations and the Norfolk Boreas area) starting on or around the 10-20.10.2022 for up to eight weeks. Vessels will be towing sparker sources and streamers at low speed. One nautical mile of CPA (Closest Point of Approach) is requested from each of these two vessels.

 

 

Contact Details – Fisheries Liaison

For fishery queries please contact:

Jonathan Keer; jonathan@brownmay.com; 07850 604851

Freya Sandison; freya@brownmay.com; 07857 500609

 

Contact Details – Vattenfall

Further enquiries should be addressed to:

Mikkel Klahn; mikkel.klahn@vattenfall.com

Rory Anderson; rory.anderson@vattenfall.com

Matina-Christina Sougle - matina-christina.sougle@vattenfall.com

Emma Merryfield - emma.merryfield@vattenfall.com

 

 

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SSER Berwick Bank Offshore Windfarm - Geotech Survey - Interim 2B



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.


SSE Renewables are not expecting fishermen to relocate gear - on this occasion the vessel(s) will work around any gear on location. A scouting/guard vessel will operate ahead of the survey vessel to ensure that this can be achieved.

 

The survey work is being undertaken by Fugro and will be conducted from the vessel Fugro Scout. The geotechnical survey is due to start in October 2022. The scouting/guard vessel will be the Artemis.

 

The scope of work within the main array area will comprise up to 35 composite rotary boreholes advanced as a combination of sampling in sand and clay and CPT downhole pushes through suitable soils and then extended by rotary core drilling to depths up to 40 m below seabed.

 

During the campaign, the survey vessel will be deploying underwater equipment to obtain cores and assess the geology in the area. 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). No towed equipment will be used.

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MetOcean Buoy Installation



Installation a floating LiDAR buoy and a Waverider buoy for met ocean data gathering. It is planned to install a floating LiDAR buoy and a Waverider buoy for met ocean data gathering. The port of mobilisation is Dundee and the installation will take place using a Multi-cat type vessel.


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MetOcean Navigation Buoy and Seabed Frame Recoveries



All metocean buoys and seabed frames have been recovered from the Northern Endurance Partnership (NEP) project area and the works have been completed.


Partrac installed metocean buoys and seabed frames in early March 2022 to monitor the local metocean conditions within the NEP carbon capture project area at 7 separate site locations M01 – M07. Following the recovery of the M05 site on Saturday 24th September 2022, Partrac can confirm that all buoys and frames have been recovered from the NEP project area and seabed, and the metocean works have been completed.

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Deployment of Two Metocean Buoys, with Co-Located Guard Buoys - Dogger Bank



The deployment of two metocean and two guard buoys at two locations within the Dogger Bank South Project Area has been extended into March 2023. Please maintain a 500 m clearance from the deployed equipment.


The guard buoys are yellow pillar shaped special marks, exhibiting a yellow St Andrews Cross day shape and radar reflector.  The buoys are each fitted with a yellow light, flash sequence: Fl (5) Y 20s 

 

The metocean buoys are 1.1 m diameter spherical buoys, fitted with a navigation light, flash sequence: Fl (5) Y 20s. 

 

Further details, including vessel informaiton, will follow ahead of deployment operations. 

 

 

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Dropped steel pipe (70cm x 10cm)



A section of steel pipe (70cm x 10cm) has been lost from the vessel Ocean Zephyr and is sticking up vertically from the seabed. Planning is underway to recover this section


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Havhingsten fibre optic telecommunication Whitley Bay Stub Route



Please be advised that installation of the Havhingsten fibre optic telecommunication Whitley Bay Stub Route is planned to commence from 13th October within 12 nautical miles. It is anticipated that installation operations will occupy up to a maximum 500m width of the seabed (250m either side of cable). The cable itself will occupy only 40mm of the seabed. The cable lay will be performed on a 24-hour basis, the progress speed is normally between 0.5 - 1.0 km/hour (17-20km per average day).


Please be advised that installation of the Havhingsten fibre optic telecommunication Whitley Bay Stub Route is planned to commence from 13th October within 12 nautical miles.

 

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

 

The proposed stub cable route in the Whitley Bay, NE (inshore) region is shown below. The Whitley Bay Stub Route is to be installed between the Beach Man Hole 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.

 

Pre-lay Grapnel Run (PLGR) will be completed before installation of the cable. Installation will be via industry standard burial tools including water jetting and ploughing. Target cable burial depth is 2m below seabed level.

 

The main form of cable protection (in addition to burial) is articulated pipe. Articulated pipe will be applied to the cable on the beach from the end of the seaward duct for approximately 425m. The cable protected with articulated pipe will be buried to a target 2m depth, or bedrock, where possible to ensure cable stability.

It is anticipated that installation operations will occupy up to a maximum 500m width of the seabed (250m either side of cable). The cable itself will occupy only 40mm of the seabed.

 

The cable lay will be performed on a 24-hour basis, the progress speed is normally between 0.5 - 1.0 km/hour (17-20km per average day).

 

Planned timings of works (exclusive of weather):

 

Description

Expected Start Date

Expected End Date

Beach & nearshore diver installation (<15m water depth)

13 October 2022

31 October 2022

Pre-Lay Grapnel Run

(>15m water depth)

15 October 2022

16 October 2022

Offshore Cable Installation (>15m water depth)

17 October 2022

21 October 2022

 

All planned installation dates/durations are subject to weather.

 

PLGR will be undertaken during the 15 to 16 October. Installation between the shore end and <15m water depth will be undertaken during the 13 to 31 October. Installation from >15m water depth will be undertaken during the 17 to 21 October.

 

All vessels are requested to maintain an appropriate and safe distance of 500m when passing the cable installation vessel whilst operational and should pass at the lowest possible speed to avoid vessel wash effects.

 

The vessel will be working throughout 24 hours and will display appropriate day shapes and lights during reduced visibility and night operations.

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Dogger Bank South Site Investigations



Fugro continue with geophysical site investigations on behalf of RWE Renewables within the proposed Dogger Bank South (DBS) Offshore Wind Farms array sites.


Geophysical Surveys

Geophysical survey operations on the Dogger Bank South array site continues with the Fugro Frontier until approximately the 31st October 2022. The Fugro Searcher has now completed their scope of works on the DBS array sites and has demobilised from the project.

 

The Fugro Frontier will be undertaking two single survey lines within the two additional areas to the north of DBS, as defined in the tie line tables.

 

As the Fugro Frontier will be towing survey equipment, vessels will require large turning circles and will be restricted in their ability to manoeuvre. All vessels operating within the array 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.

 

Please note that completion dates for all survey vessels will be dependent on the prevailing weather conditions and work progress.

 

A continuous listening watch will be conducted on VHF Channel 16 by all survey vessels.

 

Survey operations will be conducted on a 24-hour basis.

 

Vessel Name Vessel Type Call Sign MMSI Number IMO
Fugro Frontier Array Geophysical Survey Vessel C6BH4 311000263 9723667

 

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Morven Windfarms Geotechnical Survey v01



The vessel Normand Mermaid will be undertaking Deep CPT operations at 150 locations throughout the Morven windfarm area. The work is estimated to take up to 8 weeks. The vessel Normand Mermaid will deploy a seabed frame through its moonpool at each location to collect the CPT data. The vessel will be stationary for up to 6 hours at each individual location at 150 separate locations. Marine users are requested to maintain the safe clearance distances of 500m throughout the deployment period.


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Morven Offshore Wind Farm Floating LiDAR and Metocean Survey



Metocean instrumentation and a floating LiDAR system (FLS) are planned for deployment within the boundary of the proposed Morven Offshore Wind Farm Project site in the North Sea. All instrumentation is planned for deployment within the Morven Project site in September 2022 until further notice.


All instrumentation is planned for deployment within the Morven Project site in September 2022. A total of 2 metocean instrumentation moorings and 1 underwater noise monitoring mooring and one FLS mooring are to be deployed at each of two deployment locations within the Project site (known as Morven North and Morven South).

 

The metocean moorings will comprise one directional waverider buoy (DWR) which will be visible on the water surface, moored to the seabed through a combination of rope and rubber cords. The second metocean mooring will be a subsurface ‘stumpy’ mooring which will not be visible at the water surface but will float approximately 5 m above the seabed. The FLS mooring will comprise a surface visible buoy moored to the seabed through a combination of rope and chain via a single point mooring.

 

Marine users are requested to maintain the safe clearance distances of 500m.

 

All equipment will be maintained in position via appropriate mooring systems and will gather metocean data to inform the proposed Project. Details of the surface present devices and relevant aids to navigation are provided in the attached NtM. 

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Export Cable Rock Placement



Rock placement activity will commence within the Seagreen Export cable corridor.


On behalf of Seagreen Wind Energy Ltd, Nexans A/S will commence rock placement operations within the Seagreen Export Cable corridor. The flexible fall pipe vessel "Rockpiper" will install rock berms on exposed sections of all three Seagreen Export cables. Three guard vessels are currently on location along the Export cable guarding exposed areas of cable.

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Foundation Installation Campaign - Dogger Bank A



The Offshore installation vessel, Innovation, has completed the first part of the installation campaign. Mobilising from 24/09/2022 the HLV Seaway Strashnov will install monopile foundations, within the Dogger Bank A construction area.


The works will re-commence on the 26th of September 2022, continuing until approximately Q3 2023 The works will be continuous 24 hours a day. Charts of the DBA construction area and foundation locations are provided.  A running list of the next locations to be installed and completed foundation locations will be presented in the Weekly Notice of Operations.

 

During operations, the HLV Seaway Strashnovwill 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 HLV Seaway Strashnov 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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Limited CPT and Vibrocorer Survey 2022 - West of Orkney



Mariners are advised that a survey vessel and equipment will be used within the N1 PO, and associated export cable corridor route options to Caithness. This Limited CPT and Vibrocorer survey work will be carried out by MMT using survey vessel Relume from 25 September 2022.


A summary of the works can be found below:

  • This survey shall take place from 25/09/2022 to 15/10/2022.
  • Contact details
  • Onshore: phone: +44 (0) 7926418820, email: OWPLFisheries@xodusgroup.com;
  • Offshore Fisheries Liaison Officer (FLO) (bridge number): +44 (0)203 7691458.
  • Name of vessel carrying out the work and towed equipment used: Relume
  • High Performance Vibrocorer (HPVC 3/6)
  • Core Penetrometer R100
  • Port of operation: Scrabster.
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Metocean Equipment Deployments at 3 sites on the SSE Ossian Floating Offshore Wind Farm



Partrac Ltd. can confirm that an array of metocean equipment, including two floating LiDAR buoys, has been deployed at three sites within the SSE Ossian Floating Offshore Wind Farm off the East coast of Scotland. Please Maintain a 500 m exclusion around each position. The following equipment were deployed: + Floating LiDAR buoy at sites 1 and 3 + Guard buoy at site 2 + Datawell Waverider buoy at sites 1,2 and 3 + Subsea mooring at at sites 1,2 and 3


 

FLOATING LIDAR BUOY The floating LiDAR buoy deployed at sites 1 and 3 records 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 will have a flash sequence Fl (5) Y 20s. Please maintain a 500m exclusion around each buoy.

 

WAVEBUOY

The wavebuoy deployed at each site is a 1.1 m diameter yellow spherical buoy fitted with a flashing antenna with sequence Fl (5) Y 20s.

 

GUARD BUOY

The guard buoy deployed at site 2 comprises a yellow St Andrews Cross, radar reflector, and yellow navigation light. The light will have a flash sequence Fl (5) Y 20s.

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Llyr Offshore Wind Farm Geophysical and Environmental Survey



A geophysical and environmental survey will be carried out between 21st September and 1st December. The geophysical survey will employ MBES, SSS, High-resolution Sub-Bottom Profiler and a single magnetometer. The environmental survey will acquire a drop down video footage and grab samples. All geophysical survey operations involve towed survey equipment (SSS, Magnetometer and SBP), and no equipment will be left on the seabed.


Please be advised that from the 21st of September 2022, N-SEA will be conducting a geophysical and environmental surveys within the area shown in paragraph 5. The survey consists of an offshore windfarm location, and its northern export cable route corridor. The geophysical survey will employ MBES, SSS, High-resolution Sub-Bottom Profiler, and a single magnetometer. The environmental survey will acquire drop down video footage and grab samples.

The geophysical and benthic survey works will be completed by N-Sea personnel on the survey vessel ‘Braveheart Spirit’. Full vessel details are presented in paragraph 6 below.

All environmental sampling will be executed by N-Sea subcontractor Ocean Ecology.

All geophysical survey operations involve towed survey equipment (SSS, Magnetometer and SBP), and no equipment will be left on the seabed. During geophysical and environmental surveys the vessel will be restricted in manoeuvrability and will require large turning circles. All vessel operating within this area are requested to keep a 500 m distance and pass at minimum speed to reduce vessel wash. The survey vessel will always be listening to Channel 16 but can set any other channel as required. Throughout survey operations, the vessel will be displaying the appropriate lights and shapes as required under COLREGS Rule 27(b).

All nearshore activities will be undertaken during daylight hours. All offshore activities will be undertaken on a 24 hour basis.

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 geophysical and/or environmental surveys, please contact the N-Sea project manager using the contact details at the bottom of this communication.

All mariners are reminded of their responsibilities under the International Collision Regulations and are reminded of Marine Notice No 17 of 2007 which gives general advice in relation to the activities of vessels engaged in survey work for hydrographic, seismic, fishing research and underwater operations.

Liaison and General Operational Principles

  1. We will ensure advance notice of survey works is provided to all marine users.
  2. As near-shore areas have the potential to hold higher densities of static fishing gear, where practicable geophysical and environmental survey operations within the near-shore area will be undertaken during daylight hours.
  3. Should areas of high fishing density be identified, best efforts will be made to modify survey plans (either the location of survey or timing of operations) to avoid damage to both survey and fishing gear.

 

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R100 Telecom Cable Installation



Global Marine will be conducting the installation of the R100 telecommunications cables on behalf of British Telecommunications plc between May and September 2022. Timings are dependent upon weather and other operational conditions. Works will utilise the C S Sovereign and Normand Clipper vessels.


 

The vessels will be limited in manoeuvrability therefore, vessels working in the area should proceed with caution within 1NM from the cable ship during operations and all activity should remain clear 250m either side of the vessel, 500m corridor in total.

 

For a further breakdown of operations, please don't hesitate to get in touch.

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Cambois Connection Benthic Survey



SSE Renewables will be undertaking a subtidal benthic survey of the Cambois Connection, an offshore export cable associated with Berwick Bank Wind Farm which runs from the Wind Farm to Blyth. The survey will be within two proposed export cable route options. During the survey campaign, a survey vessel will deploy underwater equipment in order to gather data on the ecology of the seabed. These include grab sampling and drop down video/camera work.


SSE Renewables (SSER) is developing the Berwick Bank Wind Farm and wish to further investigate and develop the area which includes the Cambois export cable route. As a part of this investigation, SSER are undertaking a benthic survey along the Cambois Connection export cable corridor which will aim to characterise the benthic environment to inform an Environmental Impact Assessment and Marine Licence application. The purpose of the benthic ecology survey is to map and characterise the distribution and extent of marine benthic biological communities and habitats within the Cambois Connection offshore export cable corridor using grab samples and drop down video/camera work. It should be noted that SSE Renewables are not requesting fishermen to relocate gear - on this occasion the vessels will work around any gear on location. 

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Nearshore Geophysical and Benthic Survey 2022



This survey shall take place from 17/08/2022 to 10/10/2022, Spectrum Nyquist to start on 17th of August and Spectrum 1 to start on the 9th of September.


Contact details onshore FLO: +44 (0) 7926418820, email: OWPLFisheries@xodusgroup.com and offshore Spectrum Nyquist: +44 (0) 7803031728 or +44 (0) 7367033380 Spectrum 1: +44 (0) 7538 565561

 

Name of vessel carrying out the work and towed equipment used: MV Spectrum1 (Geophysical and benthic and Spectrum NyQuist (geophysical)

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North Channel, Larne and Belfast Lough: Marine Survey Update, September-October 2022



Marine geophysical survey work will commence in the North Channel over the Moyle Interconnector Cable and the Scotland to Northern Ireland Pipeline in September 2022. The Larne Lough Crossing and Belfast Lough Crossing pipelines will also be surveyed.


Geophysical survey work is due to be carried out by two vessels (detailed below).  The vessels will survey the route of the Moyle Interconnector cables, the Scotland to Northern Ireland Pipeline (SNIP) in the North Channel between Northern Ireland and Scotland and also the route of the Larne Lough Crossing and Belfast Lough Crossing pipelines.

 

The survey work is due to start on 16th September and to be completed by 16th October.  It will be carried out by the vessels Noordhoek Pathfinder (North Channel waters deeper than 10m below LAT) and Deep Marker (North Channel inshore waters to a depth of 15m below LAT; and also Belfast Lough and Larne Lough crossings).  Details for each vessel are provided below.

  • Deep Marker: nearshore survey | MMSI 245079000 | Call sign PDXJ
  • Noordhoek Pathfinder: offshore survey | MMSI 245457000 | Call sign PBYN

The vessels will monitor VHF Channel 16 at all times and can be contacted on this channel.

 

All mariners are requested to maintain a safe distance (500m) from the survey vessels at all times.

 

Further details of the survey are provided in the Notice to Mariners.

 

Please contact Neil Johnston, who is the Moyle Cable project lead (neil.johnston@mutual-energy.com); or Ryan West, who is the SNIP project lead (ryan.west@mutual-energy.com) if you have any queries or concerns about this survey.

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Areas of Exposure & Suspension - Carradale to Arran North Subsea Cable



Mariners should be aware that the Carradale to Arran North cable has areas of exposure and suspension.


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Carradale - Arran South Subsea Power Cable areas of exposure



Mariners should be aware that the Carradale - Arran South subsea power cable has areas of exposure and suspension.


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Carradale to Arran Power Cable Installation - HDD works and cable duct bell mouth



Please be advised that works relating to the installation of the replacement Carradale-Arran submarine electricity cable are ongoing.


As part of the cable replacement project a subsea duct has been installed from onshore north of Carradale  to a point ~260m from MHWS. The bell mouth duct end is exposed on the seabed and mariners should avoid  the working area within the red boundary as indicated below. 3 of concrete mattresses are located on the  HDD duct to the west of the bell mouth to stabilize this on the seabed.

 

Further works relating to the pre-lay survey, route clearance and subsea cable installation will  commence from 11th September and are covered by a separate notice to Mariners issued on 16th August 2022.  

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Floating LiDAR buoys & metocean buoys - CampionWind



Mariners are advised that from the 10 September 2022, for a period of 13 months, two Floating LiDAR buoys and one Seawatch Midi metocean buoy with an Acoustic Doppler Current Profiler (ADCP) seabed mooring will be deployed within the CampionWind offshore wind farm array. Please maintain a 400 m clearance from the deployed equipment. Deployments will be carried out over 3 days from 10 September 2022; weather permitting. Operations will be completed by the Fishing vessel ‘Elizabeth’.


From the 10 September 2022, for a period of 13 months, two Floating LiDAR buoys and one Seawatch Midi metocean buoy with an Acoustic Doppler Current Profiler (ADCP) seabed mooring will be deployed within the CampionWind offshore wind farm array to record wind and metocean data.

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

 

The Seawatch Midi metocean buoy and the FLiDAR buoys are 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 buoys are 5 nautical miles for both Seawatch Midi and the FLiDAR Buoys. All vessels are requested to maintain a safe distance (400m) from the deployed equipment at all times.

 

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

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Floating LiDAR buoys & metocean buoys - Morgan & Mona



Metocean and floating LiDAR instrumentation have been successfully deployed within the Morgan and Mona project sites. As-laid coordinates have been updated.


Metocean instrumentation and floating LiDAR instrumentation have been deployed within the boundary of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project sites in the Irish Sea.

 

The metocean instrumentation within the Mona and Morgan Project site were deployed successfully in November 2021. It should be noted that instrumentation is deployed on the seabed some distance from the surface buoy, so marine users are requested to maintain the safe clearance distances as outlined in Section 3 below. Further details on the mooring design are available in Section 7. All metocean instrumentation will remain on location until planned recovery approximately November 2022. As-laid coordinates have been updated in Section 2 for the metocean equipment, following the service visit in August 2022.

 

The floating LiDAR instrumentation were successfully deployed at the Mona Project site and the Morgan project site in March 2022. It should be noted that instrumentation is deployed on the seabed some distance from the surface buoy, so marine users are requested to maintain the safe clearance distances as outlined in Section 3 below. Further details on the mooring design are available in the attached NtM.

 

The equipment will be maintained in position via appropriate mooring systems and will gather metocean data to inform the proposed Project. Details of the devices and relevant Aids to navigation are provided below.

.

All vessels are requested to maintain a safe distance (500m) from the maintenance vessels (Forth Jouster, Vital or Vector) at all times. All vessels are requested to maintain a safe distance (400m) from the deployed monitoring equipment at all times.

 

Further details can be found within the attached NtM.

 

Morgan

Name: Fugro Buoy WS188

MMSI: 992351368

 Mona

 Name: Fugro Buoy WS187

 MMSI:  992351369

 Morgan

 Name: Morgan 01

 MMSI: 992351367

 Mona

 Name: Mona 01

 MMSI:  992351366

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Sofia OWF - Nearshore Landfall HDD Works



Mariners are advised that landfall HDD operations are expected to commence within the nearshore area of the Sofia OWF export cable route on or around 9th September 2022 and are expected to last until 31st October 2022.


Sofia OWF HDD works will comprise of non-invasive multibeam survey (MBES), subsea excavation / trenching and diving operations.

 

The Forth Warrior and the Three Rivers shall be travelling daily to site from the Port of Hartlepool, with works being undertaken during daylight hours only (weather permitting). 

 

The ABEKO Server 1 (and accompanying tug, GPS Avenger) will be running 24hr OPS (weather permitting) and will be staying on site for the duration of their activities. Operations will comprise of the 30m/30m excavation within the below coordinates.

 

The Multicat Vessel “Forth Warrior” shall deploy a 4 Point Mooring arrangement which will remain on location throughout until 31st October 2022 and will comprise of the following components at each location:

 

Anchor Components and Type

Component Type
Anchor: 2t Delta Flipper Anchor c/w 54 metres of stud link chain remaining on the seabed.
Wire on anchor / leading to the surface can buoy: 18metres (36mm galvanised steel diameter).
Can Buoy: 205ltr drum (970mm length x 580mm diameter) Yellow in colour.
Light on Can Buoy: White light flashing Iso (equal) phase.
Pick up pendant on Can Buoy: 15metres (18mm Polypropylene Rope)

 

The above components shall be placed in the following coordinates and all vessels are to avoid all of the below anchor coordinates by a minimum 250m radius at all times.

 

Coordinates of Anchor Locations

 

Lattitude (DDM) Longitude (DDM)
54° 36.21399721' N 001° 00.96500683' W
54° 36.32825771' N 001° 00.79593573' W
54° 36.39242400' N 001° 00.92659705' W
54° 36.27734109' N 001° 01.11149999' W

 

The following project vessels shall be monitoring VHF 16 during the scope of the works and shall also be exhibiting the correct day shapes and flag for vessels engaged in diving operations.  They will be restricted in their ability to manoeuvre and at anchor.

 

Vessel Name Vessel Type Length (m) MMSI Number Call Sign
Forth Warrior 4 Point Mooring Multicat 27.70 235116011 2JHR8
Three Rivers Multibeam Survey Vessel 6.20m 235091048 2FGL2
Abeko Server 1 Backhoel Dredger 55.15m 245589000 PFSZ
GPS Avenger Tug 27.02m 235100957 2GVV2

 

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Floating LiDAR buoys & metocean buoys - MarramWind



Mariners are advised that from the 10 September 2022, for a period of 13 months, two Floating LiDAR buoys and one Seawatch Midi metocean buoy with an Acoustic Doppler Current Profiler (ADCP) seabed mooring will be deployed within the MarramWind offshore wind farm array. Please maintain a 400 m clearance from the deployed equipment. Deployments will be carried out over 3 days from 10 September 2022; weather permitting. Operations will be completed by the Fishing vessel ‘Elizabeth’.


From the 10 September 2022, for a period of 13 months, two Floating LiDAR buoys and one Seawatch Midi metocean buoy with an Acoustic Doppler Current Profiler (ADCP) seabed mooring will be deployed within the MarramWind offshore wind farm array to record wind and metocean data.

All locations referred to are outlined in Table 1 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 off the east coast of Scotland.

 

The Seawatch Midi metocean buoy and the FLiDAR buoys are 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 buoys are 5 nautical miles for both Seawatch Midi and the FLiDAR Buoys. All vessels are requested to maintain a safe distance (400m) from the deployed equipment at all times.

 

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

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Seabed Activity Bluemull Sound (Shetland) – Subsea Tidal Array



The purpose of the operation is to conduct work on a subsea tidal energy array in the Bluemull Sound, Shetland.


A multicat vessel the Delta Marine Voe Jarl, call sign MSBB3 (or a similar vessel) will conduct offshore and subsea operations. Works will include loading and preparatory work at Cullivoe Pier and Belmont Pier. Operations could take place during the day or at night.   Operations will be conducted within the works area bounded by points A/B/C/D below (vessels should keep well clear e.g. 100m) and up to 50m either side of the cable corridor route; see waypoints below.

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Seabed instrumentation frame deployment - Yell Sound



A seabed instrumentation frame has been temporarily deployed in Yell Sound and will be recovered in a suitable weather / tidal window. The ballasted instrumentation frame weighs around 370kg, measures approximately 1.5m high x 1.5m wide x 1.5m long  and is connected to a 100kg clump weight via a 100m wire ground line.


The frame sits on the seabed in water of at least 35m depth, with no surface infrastructure such as buoys or markers. Vessels will be able to pass safely through the area and above the frame. Use of static or mobile benthic fishing gear in the immediate area should be avoided to avoid the risk of snagging.

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Seabed instrumentation frame deployments - South Stack Irish Sea



A seabed instrumentation frame with associated ground line and clump weight is deployed and will be recovered in a suitable weather / tidal window. The ballasted frame weighs around 370kg, measures approximately 1.5m x 1.5m x 1.5m and is connected to a 100kg clump weight and remotely actuated pop-up buoy via a 100m wire ground line. Note: two frames were deployed initially, but one of these has been recovered already.


Inside the Morlais demonstration zone the frame sits on the seabed in more than 30m of water, with no surface infrastructure such as buoys or markers. Vessels will be able to pass safely through the area and above the frames. Use of static or mobile benthic fishing gear in the immediate area should be avoided to avoid the risk of snagging.

 

The position listed here is as deployed.

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Notice to Mariners - Shetland HVDC Link (Ship to Ship Rock Transfer)



Rock placement is being undertaken by NKT, on behalf of Scottish Hydro Electric Transmission Plc, along the Shetland HVDC Link for Campaign 1 using the rock placement vessel Heimdal R. Due to the maximum load capacity of Heimdal R, transfer of rock is required to be undertaken by ship-to-ship transfer within Sinclair’s Bay, Caithness.


The rock placement being completed by Heimdal R along the Shetland HVDC Link Campaign 1 is expected to commence on the 13.09.22, with an estimated completion date of the 05.11.22. During this time coaster vessels, Hagland Carrier and Hagland Boss, will transport rock from Norway to Sinclair’s Bay to complete the ship-to-ship transfer of rock to Heimdal R. All ship-to-ship transfers will be completed in safe sea conditions and in high visibility.

 

A safe and suitable location, free from any potential hazards, within the pre-designated ship-to-ship transfer areas (see chart on the last page of the document) will be chosen on arrival of the coaster vessel within Sinclair’s Bay. Once a suitable location has been chosen, Heimdal R will confirm permission to moor alongside the coaster vessel safely and securely. The coaster vessel will then transfer the rock to Heimdal R using the excavator onboard.

 

Please be aware that during this operation, vessels, Hagland Carrier, Hagland Boss and Heimdal R, will be restricted in their ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972). Masters of vessels are therefore requested to maintain their vessels at a minimum safe passing distance of 500 metres.

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UK HDD Survey - Isle Of Grain



A survey of the Horizontal Directional Drill (HDD) route (nominally 800 m) for installation of the NeuConnect Interconnector will take place in the intertidal area of the Isle of Grain, Kent. NeuConnect is a new high voltage direct current (HVDC) electricity transmission interconnector between the Isle of Grain, Kent, mainland UK, and Wilhelmshaven, Germany, routed through UK territorial waters (TW) and exclusive economic zone (EEZ).


Nearshore Geophysical Survey will be performed by GEM in Predator vessel using towed equipment Survey Water Depth is from shoreline (+4.5 m) to 2.2 m LAT Survey is estimated to take place between 22nd August to 30th September 2022. Nearshore Geotechnical Survey will be surveyed by GEM in HAVEN SEAJACK 4 Platform Survey Water Depth is from shoreline (+4.5 m) to 2.2 m LAT.

Due to restricted manoeuvrability of vessels and equipment during the survey works other vessels are requested to maintain an appropriate and safe distance of at least 500 meters around the Predator vessel and HAVEN SEAJCK 4 Platform. The Predator vessel and the HAVEN SEAJACK 4 Platform are available for real-time notification through VHF radio channel 16.

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White Cross - Floating LiDAR system deployment



Please be advised that from the 09th of July 2022, one Floating LiDAR system is to be deployed to the Celtic sea to record wind and metocean data.


Please be advised that from the 09th of July 2022, one Floating LiDAR system is to be deployed to the Celtic sea to record wind and metocean dataPosition and coordinates where the FliDAR buoy will be deployed are provided in the table and charts below. The buoy will be deployed from Padstow harbour. The buoys will be in situ for 12 months (but up to 24 months).

 

The FLiDAR equipment will undergo regular scheduled maintenance during the operation period estimated to be 4 times a year, further notice to mariners will be issued confirming the dates and maintenance activities.

 

Following system checks onshore, the buoys will be either towed into position by a small works vessel or be deployed from a vessel through lifting of the buoys from the deck into the water. Key stages of the deployment are listed below:

1. unit delivered by road and assembled ashore;

2. unit, concrete sinker and mooring system loaded onto multipurpose vessel and taken to site;

3. concrete sinker and mooring system deployed from the vessel; and

4. unit deployed from the vessel and then attached to the mooring system.

 

Floating LiDAR Description

The floating lidar buoy is approximately 5m in length, 3m wide and 4.75m in height, with an anchor (dead man) weighing 2500kg. The system is comprised of the measurement buoy itself and a site-specific single catenary mooring.

 

Liaison and General Operational Principles

  1. The survey contractor will ensure advance notice of the installation works is provided to all marine users and the location of the buoy once installed is provided.
  2. Where considered appropriate, a Fisheries Liaison Officer will be used to provide advice during installation of the buoy and during the full deployment period of 12 months. Name: Rhys Kibble         Email:  rhys.kibble@brownmay.com          Telephone: +44 (0) 7809 337 349  

Programme

Deployment Date

From the 9th July up to 23rd July 2022 dependent on weather conditions

This date is subject to weather permitting, and therefore there may be the potential for an extension to the work duration.

Operational period

1 Year (up to 2 years from)

 

 

Safety

Lighting System

Colour: Yellow

Location: Top side of the FLS

Height of light above water: 3 metres

Flashing Intervals ODAS FI(5) 20s (range 5 nautical miles)

 

24 Hour Emergency Contact Numbers:

AKROCEAN

Mathieu DADEN +33 (0) 6 78 03 72 15

Control room VALEMO +33 (0)5 47 30 20 60

 

EMERGENCY

112 / 999 ask for the Coast Guard

VHF Channel 16

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Geophysical Site Investigation - Caledonia Offshore Windfarm



Caledonia Offshore Wind Farm has contracted Gardline Limited to carry out geophysical site investigations over the proposed Caledonia offshore wind farm site.


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Dogger Bank D Array Geophysical Survey Campaign



The offshore vessel, Guard Celena, will perform geophysical survey operations within Dogger Bank D (DBD) offshore wind farm array area.


The works will be performed in a single campaign, commencing on the 17th of August 2022 and continuing until approximately 30th November 2022. The works will be continuous, 24 hours a day. A figure of the DBD array area is provided below.

 

The operations consist of seabed geophysical survey by means of a towed side scan sonar and magnetometer.

 

During operations, the Guard Celena 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 night lights. The vessel will also transmit an Automatic Identification System (AIS) message.

 

It is requested that all vessels maintain a minimum of 500m safety separation distance from the Offshore Guard Celena and pass at reduced speed.

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Wet Stowed Export Cable



Export cable 3 has been wet stowed on the seabed in close proximity to the Seagreen offshore sub-station platform. On behalf of Seagreen Wind Energy Ltd, Nexans AS have wet stowed the end of export cable 3 on the seabed within the export cable corridor in the vicinity of the Seagreen offshore sub-station platform. The export cable installation vessel Nexans Aurora has laid down the cable at the coordinates shown below


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Notice to Mariners SHEPD ED1 Subsea Cable Installations



Please be advised that Briggs Marine Contractors (on behalf of SHEPD) shall be undertaking the following subsea cable installations: • Mull to Coll – Works commence from 5th September 2022 • Carradale to Arran – Works commence from 11th September 2022


Please be advised that Briggs Marine Contractors (on behalf of SHEPD) shall be undertaking the following subsea cable installations:

  • Mull to Coll – Works commence from 5th September 2022
  • Carradale to Arran – Works commence from 11th September 2022

 

Vessel Operations

The work utilises cable ship Elektron for boulder clearance, pUXO investigations and ROV operations along both routes. Kingdom of Fife will then carry out pre-lay grapnel runs, ahead of cable lay operations, along the specified routes. Elektron will return to site after completion of PLGR to execute the cable installations.

 

Landing craft Carly and Celtic Trader will be landing equipment at the shore ends of the cable routes with the exception of Carradale.

 

DSV Forth Drummer will be conducting diving operations within the cable corridor.

 

Elektron will be assisted at the shore ends by Celtic Guardian, Celtic Mara, Celtic Nomad and Celtic Voyager, regularly passing inside the working corridor for crew transfers and supporting nearshore cable landing operations.

 

Post lay surveys of the nearshore areas (<10m LAT) will be conducted in the period following installation but prior to cable burial. This will be conducted during daylight hours using a small unmanned survey vessel (USV) or RIB <10m long. This operation should take <1 day per landfall.

 

Cable lay activities are expected to continue over a period of 30 days, weather permitting.

 

As built surveys and burial by ROV jet trenching will follow on but will be covered by a separate NTM closer to the date of execution.

 

Work Description

During operations the vessels Elektron, Kingdom of Fife and Forth Drummer will be restricted in ability to manoeuvre. Whilst operations will seek to minimise disruption on the width of the main navigation channel, some disruption may be unavoidable during operations within the working corridor.  

 

Cable laying, boulder clearance, pUXO investigations and ROV operations may be conducted on a 24-hour basis.

 

Should any vessel wish to come within 500m of the vessels, then direct communication with the Master / Operator is required.

 

The vessels will display the appropriate lights / day shapes for their operations.

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Dogger Bank A,B&C UXO Inspection Campaign. Confirmed UXO Locations



UXO Inspection Operations within Dogger Bank A and Dogger Bank B Array construction areas have identified the presence of several confirmed UXO items.


These items will be addressed during a separate UXO Clearance phase of work estimated to be performed around October / November 2022. Until this subsequent campaign is performed it is requested that any vessel activities involving interaction with the seabed are kept to a minimum distance of 500m from the UXO items listed herein.   

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Wave Data Buoy Installation



A wave data buoy has been installed to assist foundation activity within the Seagreen Offshore Windfarm site. The wave data buoy will display the following characteristics - Fl(5)Y 20s 4M


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Deployment of ADCP Device - Berwick Bank Wind Farm



A Notice to Mariners (First Issue) for the deployment of a bottom mounted ADCP device recording metocean data at three locations within the proposed Berwick Bank Wind Farm array area. An associated guard buoy is currently deployed at each location. Expected arrival on site is mid-October 2021 with the works completed over three days; weather conditions permitting. We would like to extend the validity period from 12th October – 31st December 2021 to allow for any eventualities.


Mariners are advised that SSE Renewables will be deploying a bottom mounted ADCP device recording metocean data at three locations within the proposed Berwick Bank Wind Farm array area. An associated guard buoy is currently deployed at each location. All locations referred to are outlined in Table 1 and displayed Figure 1.

 

It is proposed that three stumpy moorings (M) and a near-bed frame (NB) will be installed on the sea bed within 175m to the three guard buoys which were installed during a previous wave buoy campaign. These locations are all within the Berwick Bank Wind Farm (BBWF) in the outer Firth of Forth on the east coast of Scotland. It should be noted that the near-bed frame will only be situated at one of these three sites at any one time.

 

The equipment will be deployed during October 2021, with an estimated start date for deployment set for the 14th October 2021. However, this may be subject to change due to weather and/or operational delays. The stumpy moorings will be deployed for 12 months with maintenance and monitoring completed at each three-month interval. The one near-bed frame will be deployed for three months at two sites and 6 months at one site, equating to a deployment duration of 12 months in total.

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Shetland HVDC Cable Lay Works Campaign 1



Scottish Hydro Electric Transmission Plc, are undertaking Campaign 1 of the Shetland HVDC Link cable installation. Campaign 1 begins at Noss Head, North of Wick and runs to until approximately KP155. The cable has successfully been laid on the seabed floor. The trenching vessel, Grand Canyon III, will be used to trench the cable to the required burial depth. For sections that cannot be trenched, rock placement will be undertaken. The rock placement works will be completed in two campaigns.


Planned Activities

 

The vessel, NKT Victoria, will be used to lay the cable on the seabed floor. Once the cable is laid on the seabed floor the vessel, Grand Canyon III, will be used to trench the cable to the required burial depth in the seabed. Any sections along the cable route that cannot be trenched, rock placement will be undertaken to achieve the required protection. The rock placement works will be completed in two campaigns. All works will be continuous, 24 hours a day.

 

Within the Noss Head Marine Protected Area the cable will be surface laid and protected by a cable protection system.

 

In the period between cable lay and cable burial, or protection by rock placement, the cable will be exposed on the seafloor. 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. For this reason, the cable corridor will remain closed for any fishing that interacts with the seabed, anchoring or use of other equipment with seabed intervention.

 

Please be aware that vessels NKT Victoria, Grand Canyon III and Grane R will be restricted in their ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972). Masters of vessels are therefore requested to maintain their vessels at a minimum safe passing distance of 500 metres. NKT Victoria, Grand Canyon III and Grane R will display the appropriate shapes and lights in accordance with COLREGs Rules 16 and 18.

 

Co-ordinates of the cable corridor and charts of the working area are provided below. 

 

Guard Vessels

 

To protect the cable during installation activities Guard Vessels will be placed at approximately 15km intervals along the cable route. To provide the required coverage, approximately 7 guard vessels are expected to be utilised. The primary purpose of the Guard Vessels is to guard any unprotected cable along the cable route. The Guard Vessels will operate on a 24hr / 7 day per week basis. Any exchange of vessels shall be on site and coordinated so the unprotected cable is never unguarded.

 

It is requested that all vessels maintain a minimum of 500m safe distance from the installation vessels and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the cable corridor.

 

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Dogger Bank A Export Cable Reduction to Charted Depth



During the campaign to lay and bury the Dogger Bank A export cable, it has been necessary to install rock berm protection over the cable in locations where it has not been possible to trench bury the cable


In the section of cable shown in Figure 1 of the attached NtM, the rock berm installation has been installed to a maximum height of approximately 0.6m above seabed level. In these locations, this represents a reduction in depth at Lowest Astronomical Tide (LAT) of approximately 5%.

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Shetland HVDC - Clump Weights



Scottish Hydro Electric Transmission Plc, have carried out a pre-lay grapnel run (PLGR) and Route Clearance (RC) of Out of Service (OOS) Cable crossings along the Shetland HVDC Link. The works are now complete and items detailed have been deposited permanently on the sea bed.


The Shetland HVDC link is a critical electricity transmission link and will form part of the electrical transmission grid that is essential to the transport of renewable energy between the locations where it is generated and areas of demand, and the delivery of both Scotland’s and the United Kingdom’s 2030 climate change targets.

 

The OOS cables were removed along the route and, in accordance with International Cable Protection Committee procedures, all cable ends left on the seabed were weighed to seabed by the means of clump weights. The clump weights are concrete discs that are 0.5m diameter and 0.2m thick. A total of 10 clump weights have been deployed and remain at their location indefinitely. They do not pose a risk to mariners; this Notice is being distributed for information purposes only. 

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Geophysical and Unexploded Ordnance Survey



Seaway 7 will conduct a geophysical/unexploded ordnance survey within the boundaries of the Seagreen Offshore Wind Farm. On behalf of Seagreen Wind Energy Ltd. Seaway 7 will commence a geophysical/unexploded ordnance survey on four spare asset locations within the boundary of the Seagreen site. The survey vessel Mersey Guardian is expected to arrive at site on or around the 25th of June to commence calibrations and survey operations.


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Temporary marker buoy - Export cable ducts of the Dogger Bank A and Dogger Bank B export cables



This notice to mariners (NtM) relates to the location of a temporary marker buoy positioned between the export cable ducts of the DB A and DBB export cables


This revised notice to mariners (NtM) relates to the location of a temporary marker buoy positioned between the DBA and B export cable ducts.

 

The Nearshore works for DBA export cable have now been completed, with the cables and cable ducts now fully buried. The temporary marker buoy has now been moved back to a position between the DBA and DBB duct exit points. The buoy will remain in this position until the nearshore works for DBB commence in 2023.

On completion of all the nearshore works, estimated for end July 2023, the temporary marker buoy will be removed from site. This NtM supersedes LF500013-MIP-DOG-NOT005 Rev03, issued on the 19th December 2021

 

The marker buoy characteristics are: Yellow Special Mark, light pattern: Fl(Y)5s Mariners are reminded to navigate with caution, keeping a safe passing distance from the temporary marker buoy and keeping a continuous watch on VHF Ch. 70/16 when navigating the area.

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Geotechnical Survey - Morgan and Mona Offshore Wind Farm



The offshore geotechnical survey of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project array areas will commence on the 14 June 2022 and 19 June 2022.


The offshore geotechnical survey of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project array areas will commence on the 14 June 2022. The investigation involves the drilling, sampling and coring of 30 boreholes throughout the two proposed areas, utilising the vessel Fugro Synergy. The vessel will be stationary at each borehole location for up to 3 days to allow the samples and cores to be taken from the seabed.

 

In addition to the above, further offshore geotechnical survey of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project array areas will commence on the 19 June 2022. The investigation involves acquiring up to 120 Cone Penetration Tests (CPTs) (deep push) throughout the two proposed areas, utilising the vessel Normand Mermaid. The vessel will be stationary at each CPT location for up to 6 hours to allow the samples to be taken from the seabed.

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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 MSS which aims to concurrently study predator (seabird and marine mammal) and prey (fish) distribution and behaviour in and around offshore wind farms. Deployed: 10 April 2022. Removed: 30 August 2026.


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. 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 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) 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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Shallow Burial - Amitie Cable System



Alcatel Submarine Networks UK Ltd (ASN) was contracted to carry out construction activities for the AMITIÉ cable system. The AMITIÉ cable system spans nearly 6,600 km in total with the UK landing point in Widemouth Bay, near Bude, Cornwall. Shallow burial areas and short sections of surface laid/exposed cable in UK territorial waters. The areas of shallow burial and surface laid cable are due to hard ground or rock, where cable burial to the target depth was not possible.


The construction activities in the area shown were completed nearshore on 7th July 2021 using the vessel “Viking Energy”, and offshore on 24th August 2021 using the vessel “Ile de Brehat”. Post-lay inspection and burial (PLIB) works were completed on 29th November 2021 using the vessel “Ile d’Aix”.


This notice is issued to inform of as-laid shallow burial areas and short sections of surface laid/exposed cable in UK territorial waters. The areas of shallow burial and surface laid cable are due to hard ground or rock, where cable burial to the target depth was not possible. No further burial or protection works are planned for the AMITIÉ cable at this time.


It is requested that all vessels operating in this area keep their distance and avoid any works near the cable position. In view of the serious consequences resulting from damage to submarine cables, vessel operators should take special care when anchoring, fishing, mining, dredging, or engaging in underwater operations near areas where these cables may exist or have been reported to exist. In order to minimize the risk of such damage as much as possible, vessels should avoid any such activity at a minimum distance of 0.25 nautical mile, on either side of submarine cables.
 

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Dogger Bank A Boundary Buoy Installation - as installed locations



The Trinity House Buoy Installation Vessel, Galatea, has installed the Dogger Bank A boundary Demarcation Buoys in the Southern North Sea.


The 17 construction boundary demarcation buoys will remain in location until the windfarm construction activities have been completed and handed over to the Operations and Maintenance teams.

 

Once the permanent Aids to Navigation (AtoN) have been installed on the WTGs, Trinity House will approve the permanent AtoN and the boundary buoys will be removed.

 

If anyone finds a buoy that is off station or encounters a buoy location where it is not functioning or is missing, they should report this to the Dogger Bank Duty Marine Coordinator as soon as possible.

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Redeployment (Floating LiDAR Redeployment) - Valorous



The redeployment of the Floating LiDAR system within the proposed Valorous Floating Offshore Wind Farm project site, following recovery in January 2022, has been successfully undertaken.


Redeployment and Operation Floating LiDAR System

 

To inform the engineering designs and Environmental Impact Assessments (EIA) for the proposed Valorous Floating Offshore Wind Farm (FLOW), a Floating LiDAR and associated mooring system has been successfully redeployed within the boundary of the proposed Valorous Floating Offshore Wind Farm (FLOW) project site.

 

The Floating LiDAR is maintained in position via appropriate mooring systems. The Floating LiDAR will remain at the location listed below for a 11-month period. Details of the device and relevant Aids to Navigation are provided within the attached NtM.

 

All vessels are requested to always maintain a safe distance (100m) from the Floating LiDAR.

 

The Floating LiDAR equipment will undergo regular scheduled maintenance during the operation period, further notice to mariners will be issued confirming the dates and maintenance activities

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Mooring and scientific equipment installed - Moray West offshore windfarm site



Mariners are advised that the University of Aberdeen has completed the installation of the moorings and equipment listed in the current notice. Moorings support sound recording equipment, and / or acoustic loggers that record echolocation clicks of dolphins and porpoises. Subsurface moorings extend no more than 3 m vertically from the seabed. The recording equipment and moorings will remain at these locations for 6 months and should be retrieved in October 2022.


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Guard Buoy Deployment - Berwick Bank OWF



Mariners are advised that a guard buoy associated with a bottom mounted ADCP device recording metocean data within the proposed Berwick Bank Wind Farm array area will be deployed.


This is part of a wider deployment of three guard buoys and associated equipment from October 2021. The guard buoy replaces one previously lost buoy in January 2022. It will be installed at the same location using the same methods. The Forth Warrior is the planned deployment vessel. A notification will also be provided on Kingfisher Information Services.

 

Expected arrival on site is 14th to 30th April 2022 with the works completed the same day where possible, weather conditions permitting. Therefore, we would like the validity period for this Notice to Mariners to be the 14th April 2022 – 31st October 2022 to allow for any eventualities during installation operations and to cover any ongoing O&M activities throughout the deployment period.

 

Please see the attachment pdf for further details. 

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Inter Array Cable Installation - Seagreen Site Boundary



On behalf of Seagreen Wind Energy Ltd, Seaway 7 will install and trench inter-array cabling between the wind turbine generator foundation structures and offshore sub-station platform within the Seagreen site boundary. Operations will commence with cable lay and trenching between wind turbine generator foundation structures, inter array cables will also be installed into the Offshore Substation Platform at a date to be confirmed. Two vessels will be involved in the operation.


Siem Stingray – This vessel will act as the Installation Support vessel, cable installation technicians will be deployed to the wind turbine generator foundation structures using the vessels’ motion compensated gangway system. The cable pulling equipment will be transferred onto the foundation structure and set up ready for the cables to be pulled into the structure and secured in the foundation basement. The motion compensated gangway system can be used for personnel and cargo transfers.

 

Seaway Phoenix – This vessel will lay the inter array cable between adjacent foundation structures. Once the cable has been pulled in and secured at the first foundation, the cable will be surface laid to the second foundation, pulled in and secured. On completion of this operation the cable will be trenched to a pre determined depth utilising a remotely operated trenching vehicle.

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Completion of works - Moray East Offshore Transmission & Offshore Substation Platforms



The works associated with the Offshore Transmission (OfTI) and Offshore Substation Platforms (OSPs) were completed on the 13th January 2022. Overall care, custody and control of the works has been handed over to the Moray East Operations and Maintenance Team.  Please note, construction works associated with the Windfarm Infrastructure remain ongoing.  


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Deployment of a SeaWatch LiDAR Buoy (SWLB) - Awel Y Mor Offshore Wind Farm



Awel Y Mor Offshore Wind Farm Limited are planning the Deployment of a SeaWatch LiDAR Buoy (SWLB); this is a sea state measurement instrument (referred to as ‘the equipment’). The deployment location is within the UK Sector off the North Wales coast at Liverpool Bay. The equipment will be deployed within the Awel Y Mor Offshore wind farm array limits and will be deployed for approximately twelve months from March 2022.


The equipment will be located as close as reasonably practicable to the coordinates as provided within this Notice to Mariners.

 

The buoy was successfully deployed the 26th of March and the coordinates for the as laid main anchor position is updated.

 

Scheduled maintenance is planned in the autumn/winter of 2022, from September onwards.

 

Unforeseen maintenance may also be required. The mooring design is specific to each SWLB deployment and location. The equipment will be moored through a combination of steel chains, rope and rubber cord to approximately 3000 kg anchor weight at the seabed.

 

The equipment is an integrated Seawatch Wavescan buoy and ZX 300M LiDAR; the purpose of the equipment is to collect oceanographic and meteorological data using a single platform. The equipment is supplied and charged by an onboard power system which uses methanol fuel cells and solar panels to recharge onboard lead acid batteries.  

In order to minimise the risk to other sea users, the measures listed below will be adopted for this deployment:

 

The equipment will be equipped with a F1 (5) Y 20s light with 4-5 nautical mile range; the light will be mounted at the top of one of the masts, approximately 4 m above sea level.  

 

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Construction of Wind Farm - Neart na Gaoithe Offshore Wind Farm Limited



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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Seagreen Offshore Wind Farm – Maintenance of Acoustic Monitoring Devices



Maintenance works will be undertaken on the five acoustic monitoring devices located in and around the Seagreen Offshore Wind Farm site.


Mariners are advised that maintenance works on the five acoustic monitoring devices in an around the boundaries of the Seagreen Offshore Wind Farm will be undertaken. The Marine Scotland Science vessel Alba na Mara plans to service the 3 monitors outside the site boundary this evening 14th of March. The 2 monitors inside the site boundary will be serviced tomorrow, 15th March. These acoustic monitoring devices collect real-time noise measurements for a period of 36 months. The devices will be inspected and maintained at least every four months.

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Seagreen Offshore Wind Farm –Installation & Commissioning of Wind Turbine Generators



Installation of wind turbine generators (WTG) will commence within the boundaries of the Seagreen offshore wind farm.


On behalf of Seagreen Wind Energy Ltd, MHI VestasOffshore Wind will commence the installation and commissioning of 114 wind turbine generators.There shall be four vessels utilised during thisoperation.The Jack up Vessel Wind Orca will be the main installation vessel. Wind Orca will transport the WTG components to site, jack up to the required height next to the foundation structure and install the WTG components.The Service Operation Vessel (SOV)Acta Centaurus will provide accommodation for the WTG commissioning technicians. Personnel will utilise the Acta Centaurus’s walk to work gangway system to access the WTG structures for commissioning activities.Two Crew Transfer Vessels(CTV’s), HST Euan and the HST Harri will support the above two vessels during installation and commissioning activities.The above vessels are expected to arrive at the Seagreen site on or around the 5thof December, WTG installation activities shall continue until late 2022.

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Deployment of Floating LiDAR Buoy - Berwick Bank Wind Farm



Mariners are advised that SSE Renewables will be deploying a floating LiDAR Buoy within the proposed Berwick Bank Wind Farm array area.


The LiDAR buoy will measure the wind conditions to provide valuable meteorological data to the offshore community that is needed for offshore wind resource characterisation

 

All locations referred to are outlined in Table 1 and displayed Figure 1 within the Notice to Mariners (provided as an attachment to this notice). These locations are all within the Berwick Bank Wind Farm (BBWF) in the outer Firth of Forth on the east coast of Scotland.

 

Expected arrival on site is 5th to 22nd November 2021 with the works completed the same day, weather conditions permitting. Therefore, we would like the validity period for this Notice to Mariners to be the 01 November 2021 – 30 November 2022 to allow for any eventualities during installation operations and also to cover any ongoing O&M activities throughout the deployment period.

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Seagreen Offshore Windfarm - Foundation Grout Installation



Grout will be installed in the Wind Turbine Generator foundation suction caisson voids within the Seagreen site boundary


On behalf of Seagreen Wind Energy Ltd, Seaway 7 will install grout to the Wind Turbine Generator foundation suction caisson voids within the Seagreen Site Boundary. The vessel EDT Hercules will transport the grouting mix to site and set up at the requisite foundation location. A grout hose will be connected to the suction caisson with the grouting mixture being injected into the caisson void. A remotely operated vehicle (ROV) will also be utilised in this operation.

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Carradale - Arran North and South Subsea Cables Charting Errors



The charted locations of the Carradale to Arran subsea electricity cables in the Kilbrannan Sound may be inaccurate and are being reviewed. Any corrections required will be issued as soon as possible. Mariners should be aware that the true cable locations may be up to ~300m from the presently charted positions. The location of this hazard notice is not indicative of any true cable location and is for information only.


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Seagreen Offshore Wind Farm - Scour Protection Installation



Subsea Scour Protection rock installation will commence on the Seagreen Offshore Windfarm foundation structures within the site boundary.


On behalf of Seagreen Wind Energy Ltd, Seaway 7 will install seabed scour protection rock to the foundation structures within the site boundary. The Flexible Fall Pipe Vessel (FFPV) Bravenes will transport and install the rock on the seabed using its flexible fall pipe system. This allows the scour protection to be installed with a high degree of accuracy. An ROV at the end of the fall pipe will be utilised to control the flow of rock to the seabed.

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Seagreen Offshore Windfarm - Deployment of a Guard Vessel



Due to construction activity commencing within the Seagreen development site a guard vessel will be deployed.


In conjunction with the commencement of wind turbine generator foundation installation activities, Seaway 7 will deploy a site Guard Vessel on behalf of Seagreen Wind Energy Ltd. The vessel will be deployed on or around the 01st October and will make six hourly VHF radio broadcasts containing information regarding the Seagreen development, including installation activity, safety zone information and site demarcation buoyage information. The first guard vessel to arrive will be the Renown FR246.

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