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Geophysical survey - Nemo Link Cable



A geophysical survey near the UK landfall of the Nemo Link cable, performed by the vessel Geosurveyor VIII from 15 April 2021 until 31 May 2021. The survey is performed by multibeam and towed side scan sonar.


The activities comprise high resolution bathymetry surveys of the Nemo Link cable near the UK landfall, as part of a  maintenance programme of the Nemo Link Limited assets.

 

The Nemo Link cable is HVDC interconnector between the high voltage grid systems of Belgium and the United Kingdom.

 

The surveys are part of a monitoring programme of the seabed along the Nemo Link cable.

 

 

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Geophysical Survey - Triton Knoll



A-2-Sea Solutions will be carrying out a geophysical and environmental survey of the Triton Knoll infrastructure including WTG's, array cables and export cables.


Geophysical survey operations involving hull mounted multibeam echosounder and towed side scan sonar (SSS) of the Triton Knoll wind farm assets will commence in mid-June from the vessel Cerys Line (27m LOA).

 

The SSS will be towed up to 150m astern. A wide berth is requested at all times as the vessel will be restricted in her manoeuvrability. 

 

Environmental survey operations will commence in early-mid July, following completion of the geophysical survey.

 

Drop down video and sediment grab samplers will be deployed from the stern of the vessel, restricting manoeuvrability.

 

Cerys Line will exhibit lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

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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:

 

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

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

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
Rover Alpha Guard Vessel MLAS2 235010380 8959817 Grimsby 21/04/2022
Seacat Courageous Crew Transfer Vessel 2IDC9 235108711 9758052 Grimsby 01/05/2022
Seacat Defender Crew Transfer Vessel 2GJY5 235098051   Grimsby 17/05/2022

 

Mariners are advised that the vessel outlined below is due to commence operations at Triton Knoll Offshore Wind Farm export cable corridor:

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

RockPiper Pipe/ Cable Burying vessel 5BML3 209449000 9583861 Norway 25/05/2022

 

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)

 

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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Geophysical Survey - Dogger Bank C Export Cable



The survey vessel, Northern Franklin, will conduct a geophysical Pre-lay survey along the Dogger Bank C export cable corridor in the Southern North Sea, between 9th March 2022 and approximately 25th May 2022. Survey operations will be continuous, 24 hours a day.


The works will contain both geophysical and seismic surveys, carried out using towed equipment. The towed streamer(s) is up to 320 m behind the vessel.  It is therefore requested that all vessels maintain a minimum 1800m separation distance from the survey vessel and pass at reduced speed.

 

A detailed survey will be carried out along several corridors within the survey area. The survey work will be hull mounted Multibeam sonar and subbottom profiler work, along with towed Side scan sonar and piggy backed magnetometer-up (tow max 320 m).

 

During operations the Northern Franklin 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.

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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:

 

Export Cable Installation

The cable laying vessel, NKT Victoria, is currently in Karlskrona in Sweden, loading the second part of the export cable. On completion of loadout the NKT Victoria will return to site and continue the cable installation, joining the cable and continuing to lay towards the construction site.

 

Guard Vessels

Guard vessels are deployed along the export cable route.

 

Cable Burial

The trenching support vessel, Grand Canyon III, is currently conducting post-lay burial operations, including post-trench survey, on the Dogger Bank A export cable. The exact sequence of trenching and post trench survey will be subject to on-site conditions and operational planning, but in general is typically undertaken in 10-20 km blocks of alternating trenching followed by survey.

 

Inter Array Cable Boulder removal and route clearance

The Offshore Supply Vessel, WORLD PEARL, will perform the Route Clearance operations on Dogger Bank A Inter-Array Cables routes.

 

The operations include the relocation and/or removal of subsea objects, such as debris (e.g. steel wire) and boulders, by means of a subsea Grabbing Remoted Operated Vehicle (GROV) within the array cable routes.

 

Scour Protection Installation The fall pipe vessels Flintstone and Simon Stevin will supply, transport, and install scour protection at 95 monopiles foundations on Dogger Bank A.

 

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

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Exposed power cable in free-span (up to 2 metres off the seabed)



A recent survey has detected a 17m long cable suspension (free-span), that is up to 2 metres high, on the BritNed Interconnector HVDC cable. This poses the risk of entrapment of trawling gear; all vessels fishing are advised to keep well clear. At its maximum height, the suspension is in the order of 1.5 - 2m clear of the seabed. BritNed are actively looking at remedial options, but in the meantime all fishing vessels are advised to give this location a wide berth.


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Diver Works Noss Head - Shetland HVDC HDD



Scottish Hydro Electric Transmission Plc, as part of the Shetland HVDC Link Project will be undertaking diving operations at Noss Head. The works will commence on the 8th of June and are located approximately 400m offshore in around 19m of water.


 Scottish Hydro Electric Transmission Plc, will be undertaking diving operations at Noss Head to assist with cable pull-in for the Shetland HVDC Link. The works are located approximately 400m offshore in around 19m of water.

 

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.

 

Three Horizontal Directional Drilled (HDD) ducts were installed at the site in 2021. These ducts are currently protruding from the seabed. Diving operations are planned to be undertaken at the protruding duct locations between the 8th June 2022 and 6th of  August 2022 to assist with cable pull-in. A wider area, referred to as the ‘Mooring Area’, is the area in which the diving and cable pull-in operations will take place.   

 

Vessels are required to maintain a safe distance from the ‘Mooring Area’ until the estimated completion date of 09 August 2022.

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Removal Activities - Hornsea Three Marine Debris



Mariners are advised that Ørsted will be commencing a scope of marine debris removal work within four Areas of Search (AoS) as part of a compensation scheme associated with the Hornsea Project Three Offshore Wind Farm (Hornsea Three), located within the UK Sector of the North Sea. Marine debris removal will commence from end May and be undertaken through June and July. The four AoS are located outside of Hornsea Three Order Limits.


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Survey - Hornsea Three Offshore Wind Farm - Kittiwake



The survey is being undertaken for the purposes of geotechnical investigations at proposed locations for Kittiwake artificial nesting structures as part of a compensation scheme associated with the Hornsea Project Three Offshore Wind Farm (Hornsea Three) project, located within the UK Sector of the North Sea.


 Operations are anticipated to mobilise from Lowestoft on 24 May 2022 with investigations targeting the Lowestoft Banks, Minsmere A and Minsmere B sites. The works will last for approximately 8 days, allowing for mobilisation, de-mobilisation and weather contingency.

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Geophysical and environmental survey - Morgan and Mona Offshore Wind Farm Project



A geophysical, geotechnical and environmental survey of the proposed Morgan and Mona Offshore Wind Farm Project will commence on the 01.06.22 for approximately 1 week. The survey involves the use of Multibeam Echosounder (MBES) and Sidescan Sonar (SSS) some of which will be towed approximately 50m astern of the vessel.


The nearshore geophysical, geotechnical and environmental (benthic) survey of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project cable corridors will commence on the 1 June 2022. The survey involves the use of Multibeam Echosounder (MBES), Sub-bottom Profiler (SBP), Sidescan Sonar (SSS) and Magnetometer equipment, some of which will be towed approximately 50m astern of the vessel, during June. This will also include lowering equipment to the seabed to acquire environmental and geotechnical samples. Drop-down camera and grab samples will also be collected approximately every 1km during this period as well.

 

The survey area will cover areas inshore of the 15m water depth to approximately 2m. However, the survey vessel will only survey within a 1.5km width corridor within the survey area. The outline programme of works is provided below (not inclusive of weather delays).

 

All vessels are requested to maintain a safe distance (0.5 nm) from the survey vessel Titan Endeavour at all times. Vessels will display appropriate shapes and lights when surveying.

 

Outline programme of works

Geophysical survey (inclusive of towed gear)

Mona

Start Date: 02/06/22

Estimated Duration: 1-2 days

Morgan

Start Date: 03/06/22

Estimated Duration: 2-3 days

Drop-down camera

Mona

Start Date: 05/06/22

Estimated Duration: 1-2 days

Morgan

Start Date: 06/06/22

Estimated Duration: 1-2 days

Benthic survey

Mona

Start Date:07/06/22

Estimated Duration: 1-2 days

Morgan

Start Date: 08/06/22

Estimated Duration: 1-2 days

 

Contact details for the Fishing Industry Representative are provided below.

 

Tom Watson (NFFO)

 

Email: tomwatsonfleetwood@btinternet.com

 

Telephone: +44 790 317 3624

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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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Scour Protection Installation - Dogger Bank A



The fall pipe vessels Flintstone and Simon Stevin will supply, transport, and install scour protection at 95 monopiles foundations on Dogger Bank A.


The work will be performed from 25th of May 2022 up until approximately 30th of July 2022. Work will be continuous, 24 hours a day. Coordinates of the scour protection locations are presented in Table 1 in the attached NtM.

 

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

 

It is requested that all vessels maintain a minimum of 500m separation distance from the Flintstone and Simon Stevin and pass at reduced speed.

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Geophysical Turbine Survey - Moray East Offshore Windfarm



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake geophysical surveys around nine Wind Turbine Generator (WTG) locations. The geophysical survey is to be conducted at each proposed WTG location (as listed in Table 1 and shown in Figure 1) covering an area of 270m x 270m cantered on the respective WTG (Figure 2). These survey vessel to be used is the Waterfall. Activities are expected to commence on 18/05/2022 for approximately 10 days.


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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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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 from mid-May onwards. 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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Navigational Aid - Foghorn not functional - Dudgeon Windfarm



The foghorn on one of the parameter wind turbines at Dudgeon windfarm has been found to be non-functional. Defective foghorn on WTG L03 (Location ID: DAG L3) - Foghorn has been tested and found to be non-functional. Until repair can be conducted, NTM to remain in force.


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Cable Repair - Gwynt Y Mor Export Cable



Please be advised of this notice advising mariners of the Gwynt Y Mor export cable repair. Work on site will be from 27/05/22 in the Gwynt Y Mor export cable corridor for approximately 55 days subject to weather. A barge, the NP459, will be assisted by two anchor handling vessels, the Sea Bravo and the Forth Jouster, to carry out the cable repair work. The Zwerver III and a crew transfer vessel, the Mareel Scarlet, will support the cable repair operations.


Nature of Operations

Concrete mattresses will be installed on the Rhyl Flats cable crossing by the NP459. A cable repair will follow also executed by the NP459. The NP459 will be operating on an eight anchor mooring plan. Cable lay and recovery operations will be undertaken by the NP459.

The Sea Bravo and Forth Jouster will be anchor handling in support of the NP459.

The Zwerver III will be carrying out de-burial and burial operations before installing post cable lay concrete mattresses on the Rhyl Flats cable crossing. 

The Mareel Scarlet will support the other vessels executing the works.

The work will be carried out in the cable corridor route as shown in figure 1. We kindly ask that all vessels in the local vicinity observe at least 1000m stand off from the NP459 at all times because of her anchor spread and a 500m stand off from the other vessels involved in the work scope.

During the works, the vessels will display the lights and signals relevant to the operations and will be monitoring VHF Channels 16 and 12.

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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. A service visit is planned during the w/c 16 May.


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. Metocean instrumentation at the Mona (South) location has been temporarily recovered from site due to damage to the mooring; this is planned for redeployment during the w/c 16 May. A service visit of the Morgan metocean instrumentation is also planned during the w/c 16 May.

 

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 Section 7. The AIS on the Mona floating LiDAR is not currently operating, but all other safety measures remain active and functional – repair work is planned for the w/c 16 May. A service visit of the Morgan floating LiDAR is also planned during the w/c 16 May.

 

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.

 

The metocean instrumentation and floating LiDAR equipment service visit planned for the w/c 16 May will be carried out by the Forth Jouster and is expected to take approximately 4 days. During the Floating Lidar servicing it will either be towed to port or landed on the deck of the vessel for servicing prior to redeployment.

.

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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Geophysical and environmental survey - Morgan and Mona Offshore Wind Farm Project



A geophysical and environmental (benthic) survey of the proposed Morgan and Mona Offshore Wind Farm Project will commence on the 02.04.22 for approximately 2 months. The survey involves the use of Multibeam Echosounder (MBES), Sidescan Sonar (SSS) and Magnetometer equipment, some of which will be towed approximately 150 m astern of the vessel.


A geophysical and environmental (benthic) survey of the proposed Morgan and Mona Offshore Wind Farm Project will commence on the 01.04.22 for approximately 2 months. The survey involves the use of Multibeam Echosounder (MBES), Sidescan Sonar (SSS) and Magnetometer equipment, some of which will be towed approximately 150 m astern of the vessel.

 

The extent of the planned survey is shown in Figure 1. The initial phase of the survey will cover the main offshore array areas, plus a larger buffer area (phase 1 survey). The survey vessel will start in the northern polygon and progress south. The second phase of the survey will cover the potential offshore cable corridors (phase 2 survey) up to the 15m water depth, with the vessel starting within the Mona potential cable corridor.

 

Coordinates of the offshore array are also provided below.

 

An Offshore Fisheries Liaison Officer (OFLO) will be present aboard the survey vessel – see details below.

 

Any at sea, operational issues should be directed towards the OFLO in the first instance.

 

More general queries about the survey and/or proposed Project can be directed towards the Fishing Industry Representative (FIR) and the Company Fisheries Liaison Officer (CFLO) – see details below.

 

All vessels are requested to maintain a safe distance (500m) from the survey vessel Ocean Observer at all times. Vessels will display appropriate shapes and lights when surveying.

 

Vessel Name:

Ocean Observer

Vessel Type / LOA(m):

Multi-Role Survey Vessel / 80.4 m

Vessel Function:

Survey vessel

VHF Call Sign:

GHXX

MMSI:

232217000

Vessel Operator Telephone:

+44 2039 917 728

+44 7584 686 311

 

  1. Project Contact Details

Offshore Fisheries Liaison Officer:

 

Chris Emerson (NFFO)

 

Email: nffo-flo@hotmail.com

 

Telephone: +44 750 748 4314

Fishing Industry Representative:

 

Tom Watson (NFFO)

 

Email: tomwatsonfleetwood@btinternet.com

 

Telephone: +44 790 317 3624

Company Fisheries Liaison Officers:

 

Beth Owens (MarineSpace)

 

Email:

yellow1-2cflo@marinespace.co.uk

 

Telephone: +44 783 355 7808

 

Jonny Lewis (MarineSpace)

 

Email:

yellow1-2cflo@marinespace.co.uk

 

Telephone: +44 781 764 4284

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Dogger Bank A Inter-Array Cables Route Clearance



The Offshore Supply Vessel, WORLD PEARL, will perform the Route Clearance operations on Dogger Bank A Inter-Array Cables routes


The works will be performed in a single campaign, commencing on the 19th of May 2022 and continuing until approximately 3rd of July 2022. The works will be continuous, 24 hours a day. Charts of the DBA IAC routes are provided below.

 

The operations include the relocation and/or removal of subsea objects, such as debris (e.g. steel wire) and boulders, by means of a subsea Grabbing Remoted Operated Vehicle (GROV) within the array cable routes.

 

During operations, the WORLD PEARL 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 Offshore Supply Vessel 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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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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Loss of Clump Weight - MarramWind



On the 6 May 2022 at 17:12 UTC, during sea acceptance trials for the MarramWind Site Investigation Surveys, a Sound Velocity Probe (SVP), Ultra Short Baseline (USBL) acoustic positioning system beacon and clump weight were lost. The lost equipment measures 100cm x 30 cm x 30cm. The depth of water where incident occurred is 125m. The Project is working to recover the object. Marine operators are advised to be aware of this object during any operations they undertake.


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

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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Seabed instrumentation frame deployments - South Stack Irish Sea



Two seabed instrumentation frames with associated ground lines and clump weights have been temporarily deployed for at least 6 weeks and will be recovered in a suitable weather / tidal window. Each 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.


Once installed in the Morlais demonstration zone the frames will sit on the seabed at depths of at least 30m, 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 positions listed here are as deployed.

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Dogger Bank A Export Cable Burial Operations



The trenching support vessel, Grand Canyon III, will perform post-lay burial operations, including post-trench survey, on the Dogger Bank A export cable in the Southern North Sea. The work will be performed in a single Campaign, starting on the 3rd May 2022 and continuing until approximately 29th July 2022. The work will be continuous, 24 hours a day.


During trenching operations and until the cable has been protected by means of burial or rock placement, the construction working corridor will remain closed for any static fishing, anchoring or use of other equipment with seabed intervention.

 

The trenching operations are planned to commence from the nearshore end of the cable route, beginning at the pre-cut trench at HDD exit, working towards the Offshore Platform. The exact sequence of trenching and post trench survey will be subject to on-site conditions and operational planning, but in general is typically undertaken in 10-20 km blocks of alternating trenching followed by survey. At existing third-party crossing locations (Langeled pipeline and SEAL pipeline), trenching exclusion zones of +/-20m shall be applied (no part of the trencher is to enter the exclusion zone).

 

During operations the Grand Canyon III 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 Grand Canyon III and pass at reduced speed.

 

Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor. 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.

 

To protect the cable in the 500m working corridor, guard vessels will be deployed along the route (described in a separate NtM). The guard vessels will contact vessels approaching within 1.5Nm.

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IRIS Fiber-Optic Submarine Telecommunications Cable Installation



Please be advised that the cable laying ship CS DURABLE will be conducting telecommunication cable installation operations for the IRIS undersea cable system between Galway Bay, via Rockall, to Iceland, work is scheduled to be carried out between approximately 30th May and completing approximately 15th August 2022.


We kindly request that ships and fishing vessels keep a distance of at least 1 nm from the cable installation vessel to ensure safe operations.  We also kindly request that any towed, set or drift gear, such as longlines, trawls gillnets, and seine nets be moved off the route by a distance of 1/2 nm on either side at the locations and during these periods noted above above in order to avoid gear entanglement. 

 

Vessel Name:                       CS DURABLE

Call Sign                                V7DI8.

VHF Working Ch.                  Monitoring 16 & 13

Activity:                                 Underwater Cable Operations

Location:                               West coast of Ireland, Rockall and UK EEZ in Atlantic waters (north to Iceland)

Activity Period:                     May 30 to August 15, 2022 [Subject to change]

24 hr. contact:                       Mobile +1 732 294 3058 when in cell range

Bridge VSAT:                       +1 346 201 5210

Office VSAT:                        +1 346 201 5209

EMAIL                                  csdrmaster@subcom.com

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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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Subsea Cable Installation - Mainland Orkney to Hoy North and Centre



Mainland Orkney to Hoy North and Centre Cable Replacements: The projects are experiencing significant delays relating to offshore cable installation and no offshore operations will be taking place until further notice. The previous Notice to Mariners dated 1st April 2022 is now cancelled. Please be advised that Global Offshore (on behalf of SHEPD) are conducting the installation of the replacement Mainland Orkney-Hoy North and Centre submarine electricity cables.


Mainland Orkney to Hoy North and Centre Cable Replacements: The projects are experiencing significant delays relating to offshore cable installation and no offshore operations will be taking place until further notice. The previous Notice to Mariners dated 1st April 2022 is now cancelled.

 

 

Please be advised that Global Offshore (on behalf of SHEPD) are conducting the installation of the replacement Mainland Orkney-Hoy North and Centre submarine electricity cables. The purpose of this notice is to outline the working area and operations for the vessels along the cable lay route. There will be three different vessels associated with the subsea cable installation process. In summary: 1. Cable Lay Vessel: Global Symphony (entire route) 2. Post-Lay Inspection of Cable: Global Symphony (entire route) 3. Post-Lay Stabilisation Works: C-Force (alternative vessels may be either C-Fenna or C-Odyssey) 4. Post-Lay Nearshore Survey of Cable: Delta 9151 (or equivalent vessel depending on availability)

 

Vessels carrying out the subsea cable works 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 from the construction vessels during marine operations (COLREGs Rule 16 & 18). Vessels associated with the works will monitor VHF Channel 16 at all times. Mobile contacts for the vessels are listed in the attached NtM. The vessels will be working 24 hours per day during these operations.

 

Cable Lay & PLIB Vessel Details The vessel that will be carrying out the crossing construction works, the cable installation works and also the cable post lay inspection operations is the Global Symphony.

 

Post Lay Stabilization Works Vessel Details The vessel that will be carrying out the post lay stabilization works on both North and Centre cable is the C-Force (or one of the listed alternative vessels).

 

Description of Installation Operations CLV Global Symphony will be installing concrete mattresses on crossing points and then lay the Mainland Orkney to Hoy North & Centre cables. The offshore post lay survey operations will be carried out by the Global Symphony immediately after completion of each cable lay operations. The construction vessel will be installing concrete mattresses and rock filter bags on both North and Centre cables at pre-determined locations as part of the post lay stabilization works. The nearshore sections of the marine cables will be surveyed using the Delta 9151 (or equivalent vessel). All above-described operations will involve ROV equipment deployed to seabed.

 

Fishing Liaison Officers (FLOs) Fishing liaison for the cable lay operations will be co-ordinated by Brown and May Marine (BMM). For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Alex Winrow-Giffin on 07760 160039, alex@brownmay.com or Meg Kalafat on 07702 710176, meg.kalafat@brownmay.com

The local Fishing Industries Representative (FIR) Chris Davidson (07810 305100), cad17@hotmail.co.uk will also be in place to liaise with the vessels and fishing operations in the area.

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Power Cable Installation - Carradale to Arran



Carradale to Arran Subsea Cable Installation: The Project is experiencing significant delays relating to offshore cable installation and apart from works in Area A, no offshore operations are anticipated to be undertaken until further notice. The planned operation dates for Area A are now from the 15th May 2022 to the 15th July 2022. This Notice to Mariners supersedes the original Notice to Mariners dated 1st April 2022.


Carradale to Arran Subsea Cable Installation: The Project is experiencing significant delays relating to offshore cable installation and apart from works in Area A, no offshore operations are anticipated to be undertaken until further notice. The planned operation dates for Area A are now from the 15th May 2022 to the 15th July 2022.

This Notice to Mariners supersedes the original Notice to Mariners dated 1st April 2022.

 

Please be advised that Global Offshore (on behalf of SHEPD) are conducting the installation of the replacement Carradale-Arran submarine electricity cable. As part of the cable replacement project, along with the cable lay and burial operations, 2 off Horizontal Directional Drilling (HDD) operations will be carried out, with the aim to install 2 of 400mm SDR11 HDPE ducts that will allow the Carradale-Arran cable to reach the onshore connection point. The purpose of this notice is to outline the area for the duct installation works (Area A) as well as the working area for the cable lay and burial vessels along the cable lay route (Area B).

 

There will be multiple vessels associated with Carradale-Arran cable installation process. In summary: - AREA A: 1. Marine assistance to duct installation limited to the HDD punch out locations: C-Force (alternative vessels may be either C-Fenna or C-Odyssey). This will include diving ops being carried out at the HDD exit points.

- AREA B 2. Boulder Relocation – Global Symphony (entire route) 3. Cable Lay Vessel – Global Symphony (entire route) 4. Post-Lay Inspection Burial (PLIB): Global Symphony (entire route) 5. Post-Lay Nearshore Survey of Cable: Delta 9151 (or equivalent vessel depending on availability)

 

Vessels carrying out the above-mentioned subsea cable works 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 from the construction vessels during marine operations (COLREGs Rule 16 & 18). Vessels associated with the works will monitor VHF Channel 16 at all times. Mobile contacts for the vessels are listed in the attached NtM.

 

Ducts Installation Works Vessel Details The vessel diving works will be carried out on the ducts#1 and #2 from is the C-Force (or one of the listed alternative vessels).

 

Description of Duct Works After the HDPE duct is pushed into the bore, divers will install over the duct temporary ballast to keep the duct in position in preparation for the cable installation works. Once the duct is stabilized, divers will remove the bullnose and install a bell mouth on each duct. The duration of the operations is shown on table 1. All vessels will be limited in maneuverability. Other vessels should maintain an appropriate and safe distance of 500m when passing the vessels undertaking cable operations and should pass at the lowest speed to avoid vessel wash effects. The vessel will be working 24 hours per day during these operations.

 

Cable Lay & PLIB Vessel Details The vessel that will be carrying out the boulder relocation works, the cable installation works and also the cable post lay inspection and burial operations is the Global Symphony.

 

Description of Installation/PLIB Operations CLV Global Symphony will be relocating boulders in preparation for cable lay operations and will then lay the Carradale to Arran cable. The PLIB operations will be carried out by the Global Symphony immediately after completion of cable lay operations. The nearshore sections of the marine cables will be surveyed using the Delta 9151(or equivalent vessel). All above-described operations will involve ROV equipment deployed to seabed.

 

Fishing Liaison Officers (FLOs) Fishing liaison for the cable lay operations will be co-ordinated by Brown and May Marine (BMM). For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Alex Winrow-Giffin on 07760 160039, alex@brownmay.com or Meg Kalafat on 07702 710176, meg.kalafat@brownmay.com

The local Fishing Industries Representative (FIR) George White on georgewhite0@gmail.com (07761 873965). will also be in place to liaise with the vessels and fishing operations in the area.

 

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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 100 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 GXS Viking.


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Export Cable Corridor Survey - Outer Dowsing Offshore Wind Farm



Outer Dowsing Offshore Wind (a joint venture between TotalEnergies and Green Investment Group) shall be conducting a 3.5 month offshore geophysical survey between the 26th March and 15th July 2022 using vessel Geo Ocean III call sign: LXGP. The survey vessel shall be towing a cable up to approximately 75m behind the vessel (the end marked by a tail buoy) at depths of up to 3m below sea level. The survey vessel shall have limited maneuverability so please allow a safe distance.


Company: Outer Dowsing Offshore Wind

Contractor: GeoXYZ Limited

Survey vessel : Geo Ocean II

Survey vessel call sign: LXGP

 

Earliest start date: 26th March 2021 Latest finish date: 5th July 2022

 

It should be noted that the survey vessel is accompanied by a fishing vessel: Sorrento providing visual reconnaissance for any sea surface obstacles.

Company : Outer Dowsing Offshore Wind

Contractor : NFFO Services Limited

Support vessel : Sorrento

Support vessel call sign : 2XLE

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Cable Route Survey - Oceaniq Q&E North and South



Mariners are advised that survey vessels and equipment will be used in the offshore areas and coastal sea waters between UK, France and Belgium. Further nearshore and landfall survey work will be concentrated around Ramsgate,UK, to Oostende,Belgium on the Northern Q&E route and Newhaven,UK to Cayaux-surMer, France on the Southern Q&E route. The nearshore geophysical surveys work will be conducted by DeepBV using survey vessels Deep Seapal and Deep Marker the 24th January 2022 to 31st July 2022.


During this survey the vessels will be deploying underwater survey equipment at which such times the survey vessel may have restricted ability to manoeuvre and approaching vessels are requested to pass at a safe speed and distance. Passing vessels are requested to give a minimum passing clearance of 300 m.

 

Project Description
Oceaniq Q&E route surveys will be conducted by MMT on behalf of Oceaniq, Global Marine Group. Global Marine are turnkey installation contractors to two fibre optic cable systems; Q&E North and Q&E South. A pre-installation geophysical survey with towed/tethered-equipment and sensors is scheduled between January and March 2022, with the installation is scheduled for 2023. The proposed subsea fibre optic cables are required to increase internet bandwidth capacity to meet rising demand. The International Cable Protection Committee (ICPC) notes that approximately 99% of the World’s communication are provided by such subsea cables.


Survey task
A detailed geophysical & geotechnical survey will be carried along the proposed cable route corridor of Q&E north and Q&E south.

  • Q&E north is approximately 112 km long and a 500 m wide corridor.
  • Q&E south is approximately 141 km long and a 500 m wide corridor.

The geophysical survey work will be conducted by vessels Deep Seapal & Marker with hull mounted MBES and SBP with ROTV mounted sidescan sonar, sub-bottom profiler and tethered magnetometer beginning January 2022.

 

Port of Operation
Deep Seapal and Deep Marker will mobilise in the port of Ramsgate, United Kingdom from 24th January 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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Geophysical survey - Morven offshore wind farm



A geophysical survey of the proposed Morven Offshore Wind Farm Project will commence on the 11th April 2022 for approximately 3 months. The survey involves the use of 2DUHR equipment, Multibeam Echosounder, Sidescan Sonar and Magnetometer equipment, some of which will be towed approximately 150 m astern of the vessel. There will also be drop-down camera, grab samples, Cone Penetration Tests and boreholes undertaken.


A geophysical survey of the proposed Morven Offshore Wind Farm Project will commence on the 11.04.22 for approximately 3 months. The survey involves the use of 2DUHR equipment, Multibeam Echosounder (MBES), Sidescan Sonar (SSS) and Magnetometer equipment, some of which will be towed approximately 150 m astern of the vessel. Drop-down camera and grab samples will be collected at approximately 86 locations during the survey, the timing of which is not yet confirmed; Cone Penetration Tests (CPTs) will be undertaken at approximately 150 locations during August; approximately 15 boreholes will be undertaken during September/October.

 

All vessels are requested to maintain a safe distance (500 m) from the survey vessel Ocean Geograph at all times. Vessels will display appropriate shapes and lights when surveying.

 

An Offshore Fisheries Liaison Officer (OFLO) will be present aboard the survey vessel – see details below.

 

Any at sea, operational issues should be directed towards the OFLO in the first instance.

 

More general queries about the survey and/or proposed Project can be directed towards the Company Fisheries Liaison Officer (CFLO) – see details below.

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Lost Grapnel equipment - Shetland HVDC



MV SIMA has been undertaking PLGR works as part of the Shetland HVDC subsea cable link project.  During operations part of the Grapnel hook used to recover debris from the seabed along the cable route was lost. The piece of equipment is diamond shaped and  measures 0.5 x 0.5 m and is approx 50mm thick. Marine operators are advised to be aware of this object during any operations they undertake.


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Site Investigation Surveys - MarramWind Offshore Wind Farm



MarramWind Offshore Wind Farm Site Investigation Campaign will commence from 11th April and run until the 30th November 2022 (including potential for weather delays/downtime).


The Survey vessels Fugro Venturer and Fugro Galaxy will be used as main the vessels to carry out the MarramWind site investigation campaign. At this stage this campaign relates to the Offshore Windfarm (OWF) array area only. Vessel turning areas will extend up to 1km beyond the survey lines.

 

The Site Investigation campaign will comprise of the following surveys for the provision of the data outline below.

  • Geophysical survey - consisting of a bathymetry survey using multi-beam echo sounding (MBES), hydro-acoustic positioning tracking USBL system, seabed mapping (side scan sonar (SSS), sub-bottom profiling (SBP), and seismic 2DUHR. The purpose of the geophysical survey is to identify the seabed and sub-seabed conditions within the survey area.
  • Geotechnical survey - a sampling and testing programme within the survey area to evaluate the nature and mechanical properties of the superficial seabed sediments. The survey programme includes vibro-coring and piezocone penetrometer testing (PCPT).
  • Environmental survey - to map the distribution and extent of marine benthic habitats. This will comprise a benthic sampling programme to collect drop-down video (DDV) footage and grab samples for the analysis of benthic fauna, particle size distribution, and sediment chemistry.

The MarramWind Offshore Wind Farm Site Investigation Campaign will commence from 11th April and run until the 30th November 2022 (including potential for weather delays/downtime).

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Mull – Coll Subsea Cable Installation



Please be advised that Global Offshore (on behalf of SHEPD) are conducting the installation of the replacement Mull-Coll submarine electricity cable. The purpose of this notice is to outline the working area for the vessels along the cable lay route.


Please be advised that Global Offshore (on behalf of SHEPD) are conducting the installation of the replacement Mull-Coll submarine electricity cable. The purpose of this notice is to outline the working area for the vessels along the cable lay route. There will be two vessels associated with the Mull-Coll cable installation and post-lay survey process. In summary:

1. Boulder Relocation – Global Symphony (entire route)

2. Cable Lay Vessel – Global Symphony (entire route)

3. Post-Lay Inspection Burial (PLIB): Global Symphony (entire route)

4. Post-Lay Nearshore Survey of Cable: Delta 9151 (or equivalent vessel depending on availability)

 

Vessels carrying out the subsea cable works 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 from the construction vessels during marine operations (COLREGs Rule 16 & 18). Vessels associated with the works will monitor VHF Channel 16 at all times.

 

Description of Installation/PLIB Operations CLV Global Symphony will be relocating boulders in preparation for cable lay operations and will then lay the Mull to Coll cable. The PLIB operations will be carried out by the Global Symphony immediately after completion of cable lay operations. The nearshore sections of the marine cables will be surveyed using the Delta 9151 (or equivalent vessel). All above-described operations will involve ROV equipment deployed to seabed. The duration of the operations is shown on Table 1. All vessels will be limited in maneuverability. Other vessels should maintain an appropriate and safe distance of 500m when passing the vessels undertaking cable operations and should pass at the lowest speed to avoid vessel wash effects. The vessel will be working 24 hours per day during these operations.

 

 

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Survey - West of Orkney Wind Farm



This geophysical survey shall take place from 2 April 2022 to 31 August 2022 and will occur in three phases: 1) Course survey lines over the offshore option agreement area and single survey lines along potential cable routes to Caithness; 2) Detailed survey in the offshore option agreement area. This phase is divided into three sub-sections and; 3) Detailed survey of potential cable corridors to Caithness. The Relume will carry out the work and the port of operation is Scrabster.


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Survey Activity - Sheringham Shoal and Dudgeon Extension



Mariners are advised that a hydrographic and geophysical survey will be conducted on the proposed Sheringham Shoal and Dudgeon Extension offshore windfarm on the North Norfolk coast using the vessel MV Ocean Endeavour starting around the 1st March 2022 and will continue for 60 days (estimated).


Survey operations shall be conducted for Equinor ASA. The survey will involve survey vessel MV Ocean Endeavour conducting hydrographic and geophysical survey operations over sites as described below.  The surveys will consist of multibeam echo sounder, pinger, side scan sonar, magnetometer and seismic equipment. The side scan sonar will be towed up to 300m behind the vessel and 10m above the seabed with the magnetometer towed behind and the seismic equipment will be towed 150m behind the vessel. 

 

Boundary coordinates are as follows:-

Point

Latitude

Longitude

1

53°13'49”N

001°09'28"E

2

53°05'29"N

001°31'29"E

3

52°59'13"N

001°22'41"E

4

53°03'00"N

001°12'12"E

 

During the survey, the vessel will display the prescribed lights and signals for survey operations and will be monitoring VHF Channels 16 and 12.

 

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Survey - Sheringham Shoal and Dudgeon Extension



Mariners are advised that a hydrographic and geophysical survey will be conducted on the proposed Sheringham Shoal and Dudgeon Extension offshore windfarm on the North Norfolk coast using vessel Ocean Researcher starting around the 1st March 2022 and will continue for 120 days (estimated).


Mariners are advised that a hydrographic and geophysical survey will be conducted on the proposed Sheringham Shoal and Dudgeon Extension offshore windfarm on the North Norfolk coast starting around the 1st March 2022 and will continue for 120 days (estimated).

 

Survey operations shall be conducted for Equinor ASA. The survey will involve survey vessel MV Ocean Researcher conducting hydrographic and geophysical survey operations on sites as described below. The surveys will consist of multibeam echo sounder, side scan sonar and magnetometersonar, and towed magnetometer arrays. The side scan sonar and magnetometer arrays will be towed up to 300m behind the vessel and 10m above the seabed.

Boundary coordinates are as follows:-

Point

Latitude

Longitude

1

53°13'49”N

001°09'28"E

2

53°05'29"N

001°31'29"E

3

52°59'13"N

001°22'41"E

4

53°03'00"N

001°12'12"E

 

During the survey, the vessel will display the prescribed lights and signals for survey operations and will be monitoring VHF Channels 16 and 12.

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Guard Vessel Deployment - Dogger Bank A Export Cable



Installation of the Dogger Bank A Offshore Windfarm Export Cable will commence on the 14th April 2022. Guard vessels will be deployed to protect the cable bundle from start of cable lay until the cable is adequately protected by means of trenching or rock placement.


To provide the required coverage, approximately 15 guard vessels will be used in the period from the 12th April 2022 until the 14th August 2022. Durations at each location will depend on progress of the cable installation, trenching and rock placement operations. Not all the vessels are expected to be used concurrently.

 

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

 

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

 

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

 

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Dogger Bank A Export Cable Installation



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


The work will be performed in two Campaigns, starting on the 14th April 2022 and continuing until approximately 2nd June 2022. The work will be continuous, 24 hours a day. Coordinates and chart of the route are provided below.

 

During the full Cable lay operation (including period when NKT Victoria has left site to pick up the campaign 2 cable) until the cable has been protected by means of burial or rock placement, the construction working corridor will remain closed for any static fishing, anchoring or use of other equipment with seabed intervention.

 

The first campaign will start with installation of concrete mattress at the Langeled pipeline crossing on the 14th April. The mattresses will be installed by NKT Victoria immediately prior to cable installation. A guard vessel will be in placed at crossing location as soon as the mattresses have been installed.

 

Starting from the landfall site, The NKT Victoria will then surface lay the export cable in a seaward direction to approx. KP70. After completing the first cable lay, she will leave site to pick up the second cable.

 

The second campaign will start around the 9th May 2022, with installation of concrete mattresses at the SEAL pipeline crossing. The cable laying operation will be initiated by jointing the campaign 1 cable to the cable in campaign 2, followed by cable lay towards Dogger Bank A Wind Farm. The end of the cable will be temporarily wet stored on the seabed until the installation of the offshore platform and later pull-in in 2023.   

 

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

 

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

 

An Offshore Fisheries Liaison Officer will be onboard NKT Victoria to provide support and coordination to fishing vessels, please see contact details below.

 

In the period between cable lay 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.

 

To protect the cable in the 500m working corridor, guard vessels will be deployed along the route (described in a separate NtM). The guard vessels will contact vessels approaching within 1.5Nm.

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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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WTG Installation and Commissioning - Moray East Windfarm



Moray Offshore Windfarm (East). Now that installation is complete. The commissioning of the 100 WTGs has now been completed and no construction activity is planned for the period 24th January 2022 to 31st January 2022. Some construction works remain outstanding and will take place prior to the final commissioning of the development.


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Dogger Bank A & B, Nearshore Intervention Works



Nearshore intervention works will resume at the Dogger Bank A&B export cable landfall site. Diving operations, trench dredging and survey works will all form part of the scope of works


The dive support vessel Isle of Jura using a five-point mooring spread, including anchors, ground tackle, riser chains and mooring cans, continues to work at the DBA export cable HDD exit location. Each mooring can is fitted with a yellow marker light displaying a set flashing sequence The Isle of Jura will remain on station/site during the night and be manned 24 hours throughout.

 

Dive operations will be carried out from the Isle of Jura. These operations may continue during the hours of darkness. A short safety message will be broadcast on VHF CH16 announcing start and end of dive operations. Flag ‘Alpha’ and the appropriate lights will be displayed during dive operations. Vessels are requested to maintain a 500m safe passing distance at all times.

 

The MV Pulsar will be carrying out MBES surveys of the seabed and along the pre-cut trenches throughout the dredging activities. The survey gear will be positioned on a side mounted pole and extended into the water. MV Pulsar will make several passes over the area at a reduced speed. MV Pulsar will transit from Bridlington Harbour to the work site throughout the project. Vessels are requested to keep well clear and pass at reduced speed during survey works.

 

The dredger barge Abeko Server 3 will be carrying out spoil management, trenching and backfilling activities. The backfilling activities will commence once the submarine power cable has been installed. The Abeko Server 3 will remain on station/site during the night and be manned 24 hours throughout. A tug, the Sil Jeske B will remain with the Abeko Server 3 to assist in barge movements/relocation on site and towing to Port when required.

 

The CTV Celtic Mara will be carrying out crew transfer activities from Bridlington Harbour to the Isle of Jura daily.

 

All vessels will display lights and day shapes appropriate to their work scope.

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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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Dropped object - Eastern Irish Sea



The seabed frame of the Mona metocean buoy has been lost in the Eastern Irish Sea. The last known location was: 53°40.268' N, 003°53.773' W. However, it seems likely that is has been dragged off location, potentially approx. 200m in a NW direction. The Mona buoy and accompanying chain have been recovered, but the seabed frame and approximately 30m of the combi rope groundline attached to the sea frame is lost. The Project is working to recover the object.


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Geotechnical Survey Campaign - Hornsea Three



Mariners are advised that Orsted Hornsea Project Three (UK) Limited (hereafter ‘Orsted’) will be commencing a scope of Geotechnical survey works from the 1st of April 2022. The survey is being undertaken for the purposes of geotechnical investigations of the Hornsea Project Three Offshore Wind Farm (Hornsea Three) project, located within the UK Sector of the North Sea, off the coast of East Yorkshire.


Please be advised that the operations are anticipated to mobilise from the 1st of April 2022 with investigations targeting the site. The works will last for approximately 70 days . The exact survey dates are dependent on mobilisation time, weather and work progress. Note that the vessels will have limited manoeuvrability and it is requested that all vessels operating near the survey vessels maintain a safe distance (at least 500m) and pass at minimum speed.

 

It is requested that anybody having knowledge of any potential objects submerged or moored on the seabed within the survey area that could be damaged or form a hazard to the survey vessel and its equipment advises Hornsea Three’s Onshore Fisheries Liaison of their position and nature.

 

Please see attached Notice to Mariners for further details.

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Anchor Block Removal - Wave Hub Site - Hayle, Cornwall



Mariners are advised that between 4th March and 15th August 2022, subject to suitable weather windows, operations will take place to remove redundant concrete and steel anchor blocks.


This will include ROV, subsea rigging, winching and under-slinging operations carried out from work vessels and heavy lift barges. Throughout said operations, these vessels shall be restricted in their ability to manoeuvre and shall be marked/ lit as such. A wide berth is requested.

 

Prior to commencing operations, an all-ships safety call shall be broadcast on VHF Ch16 confirming vessels on site and times of operation. All vessels will be contactable on VHF CH16, DSC70 for further information or Working Channel VHF 17.

 

The work will be carried out by Keynvor Morlift Ltd, Unit 15, Falmouth Wharves, Falmouth, Cornwall TR11 2TF. Tel:+44 (0)7791642452  Fax: +44 (0)845 014 9735 info@keyvormorlift.co.uk  www.keynvormorlift.co.uk.

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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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Survey - Dogger Bank South Wind Farm



RWE Renewables has contracted Fugro GB Marine Limited (Fugro) to carry out a geophysical and environmental site investigation in the North Sea for the proposed Dogger Bank South Offshore Wind Farm (DBS) site. The Dogger Bank South Offshore Wind Farm site is located 70 Nm East of Flamborough Head on the southern edge of Dogger Bank. The Dogger Bank South site are expected to be carried out with the Mainport Geo call sign:V7A270 from 23rd March 2022 until approximately the 31st October 2022.


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Hywind Tampen installation



Activity: Installation of 11 floating wind turbines with anchor system on Hywind Tampen, in the area between Snorre, Visund and Gullfaks. Two export cables will also be installed from Hywind Tampen to Snorre and Gullfaks.


Period: From 1 April until the notice is canceled in Efs, autumn 2022. Precautionary area: (1)

 

Vessels: "Skandi Skansen" (MAXR6): Installation of anchor system 1 April - 1 June.

"Skandi Iceman" (LFMY): Towing and installation of floating wind turbines from approx. 15 May until autumn 2022.

 

Note: To avoid damage to unprotected equipment on the seabed and in the water column, as well as on fishing gear, all fishing with bottom gear within the precautionary area is to be avoided. The area will also be monitored by the Equinor Operations Center, which can be reached on VHF channel 14 or on telephone +47 55 14 32 78. Until completion, this will be an extended precautionary area. We will provide an updated Notice to Mariners regarding the permanent precautionary area that will be established when the wind farm installation is completed. Charts: 304, 307.

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Offshore Sub-station Hook Up & Commissioning Activity - Seagreen Offshore Windfarm



A period of hook-up and commissioning activity will commence at the Seagreen Offshore Wind Farm Sub-Station platform.


On behalf of Seagreen Wind Energy Ltd, Petrofac will hook-up and commission the Seagreen offshore sub-station platform. To assist in this activity the Jack Up Barge Borr Ran will be positioned next to the sub-station platform to act as accommodation for those personnel involved. The Borr Ran Jack Up Barge will be assisted into position by an anchor handling tug and two support tugs. During final positioning a four-point anchor spread will be utilised. Once the barge is positioned the anchor spread will be removed. During the period the anchor spread is deployed there shall be a 750 metre exclusion zone centred around the sub-station platform, this zone shall apply to all vessels other than those involved in the operation.  

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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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Inch Cape Offshore Met Mast AIS currently non-operational



Please be advised that the AIS on the Inch Cape Offshore Met Mast is currently non-operational. The marine navigation lights, foghorn, aviation lights remain operational. This fault will be investigated and notification provided once the AIS is operational again. 


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Exposed Pipe - Temporary marker buoy



This notice to mariners (NtM) relates to the location of a temporary marker buoy positioned between the exposed export cable ducts protruding from the seabed, and further relating to spoil piles, which are estimated to reduce water levels at LAT by approximately 25%.


**Update** The temporary buoy has been moved to a new location to tyhe South West of the work site while works are in progress

 

 

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 Rev02, issued on the 26th Aug 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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Metocean Buoy Deployment - Northern Endurance Project (NEP)



MetOcean buoys will be installed to monitor the local metocean conditions within the NEP carbon capture project area at 7 separate site locations MO1–MO7. Each site shall have a seabed frame with attached acoustic release mechanism and a surface navigation buoy. At site MO2 a wave buoy will also be installed. Deployment operations are estimated to be carried out over a total of 4-6 days from 1st March 2022 for 6 months using the vessel Forth Warrior call sign: 2JHR8.


The navigation buoys are yellow pillar shaped special marks, exhibiting yellow St Andrews cross day shapes. The buoys are each fitted with a yellow navigation light with sequence: Fl Y 5s


The wave buoy at site MO2 is a 1.1 m diameter yellow spherical buoy fitted with a flashing antenna with sequence: Fl(5) 20s


It is advised to give 300m clearance to each mooring location
 

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



Partrac are to deploy two metocean buoys at two locations within the Dogger Bank South Project Area in January 2021, for a period of 6 months. The metocean buoys will be deployed alongside two guard buoys which will be co-located ~200 m NNW from the Metocean Buoys. 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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Shetland HVDC Link - Presence of HDD Exit Ducts at Noss Head



This notice is issued to make mariners aware of the completion of the HDD operations and the presence of three ducts protruding from the seabed at Noss Head.


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. As part of the installation schedule Horizontal Directional Drilled (HDD) exit points have been installed at Noss Head by NKT, on behalf of Scottish Hydro Electric Transmission.

 

The HDD exit points are located approximately 400m offshore in around 20m depth of water. This Notice is issued to make mariners aware of the presence of three ducts protruding from the seabed at this location.

 

Three steel pipe ducts have been installed with trajectories that emerge from the seabed around 400m offshore. The ducts have been pushed out from each of the three HDD exit points and extend up to 4m into the water column at an angle of approximately 9º to the horizontal as shown in the diagram and illustrations within the attached Notice to Mariners.

 

The HDD installation operations are now complete, and the moorings and anchors used to assist with diving operations for the HDD installation activities have been fully recovered. Therefore, the HDD exit point area is no longer identified by marker buoys.

 

It is recommended that mariners make note of the HDD duct locations and remain vigilant of the seabed protrusions until June 2022, when further installation works are scheduled.

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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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Deployment of Wave Data Buoy



Deployment of a temporary Wave Data Buoy. On behalf of Seagreen Wind Energy Ltd. Seaway 7 will deploy a temporary Wave rider buoy to assist the Heavy lift vessel Saipem 7000 to install foundations. The Waver rider buoy will stay on location until the completion of foundation installation phase.


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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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Construction work - Seagreen Offshore Windfarm



On behalf of Seagreen Wind Energy, Seaway 7 will commence installation of 114 three legged suction caisson foundation structures. The foundations will be towed from Nigg,Cromarty Firth.On arrival at site the foundations will be installed by the Heavy Lift vessel Saipem 7000.The tug Nicobar will assist the Heavy Lift vessel with barge mooring operations.Foundation grouting operations will take place from the vessel EDT Hercules. Installation is expected to commence on or around 1st October 2021.


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Wave Buoy Deployment - London Array Offshore Wind Farm



A Wave Rider Buoy will be deployed onsite from 24th September until further notice as part of ongoing monitoring of offshore conditions to support operations. Spectrum Offshore will be engaged to deploy the buoy. Description of wave rider buoy: Yellow spherical buoy, transparent top dome with solar panels and flashing light. Weight: 197kg Size: 1.10m Diameter. The buoy is connected to a subsea weight on a surface line. Vessels are requested to always maintain a 250m clearance around the buoy.


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Pentland Floating Offshore Wind SEAWATCH LiDAR Buoy



Fugro have deployed a SeaWatch LiDAR Buoy (SWLB) within the Pentland Firth, located off the north coast of Scotland. The equipment will be deployed for approximately one year and has been moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.


Fugro have deployed 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 of the North Sea off the north coast of Scotland.

  • The equipment was deployed on 29 August 2021, and will be deployed for approximately one year.
  • The equipment's location is provided within the attached Notice to Mariners.
  • Scheduled maintenance of the equipment is planned every six months, but unforeseen maintenance may be required.
  • The equipment has been moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.
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