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Please be further advised that CS Pierre de Fermat has completed the cable repair and remedial burial operations. 

Please be advised that CS Pierre de Fermat has completed remedial burial operations. 

Large t section frame of approximately 14 x 7 meters located during ROV seabed inspection

Debris removal and as left survey is scheduled for ~1st week of MArch 2026 (weather dependant). The IMR vessel Seven Viking (Call sign LCPX) will be used for this scope

USVs are expected to operate out of Westray Marina for the full survey duration. A mix of USVs with both hull mounted survey sensors (Multibeam Echosounders & Sub-Bottom Profilers) and also towed sensors (SideScan Sonar & Magnetometer) through the water in proximity of the seabed will be used. A crewed Support Vessel will be chartered throughout the survey to support the USVs with departures and arrivals from Westray Marina and assist in towing them back in if a technical issue occurs

Operations are expected to commence around 08 December 2025. It is expected that the survey activities shall be completed within 20 days (subject to weather)

Cables included within this NtM are: 

1. Islay - Colonsay
2. Mull - Coll

The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates. All vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations. All survey vessels will monitor VHF Channel 16 throughout survey operations.

Cables included within this NtM are: 

1. Skye - Harris

The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates. All vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations. All survey vessels will monitor VHF Channel 16 throughout survey operations.

Please be aware that, during the major repair activities, by virtue of its mode of operation the Jack-up vessel will be Restricted in her Ability to Manoeuvre (RAM) as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972, Rule 3). Masters of vessels are therefore requested to maintain their vessels and gears at a minimum safe passing distance from the vessel of 500 metres when it is undertaking work and showing the appropriate shapes and lights in accordance with COLREGs Rule 27.

In order to not compromise the safety of the Deme Apollo and their crew, and the ability to undertake its contracted works, fishermen who have static fishing gears deployed within 500 m from the WTG where major repairs are planned (see Table 1 and Figure 1) are requested to provide the coordinates of such deployed gears DMS and details of whether the surface markers used are visible at all states of visibility to Alex Winrow-Griffin (Brown & May Marine) using the contact information below (Section 58 of the Merchant Shipping Act 1995).

Fishermen who have static gears deployed beyond 12 nm are reminded that static gear must be marked in accordance with Commission Implementing Regulation (EU) No.404/2011 (https://www.gov.uk/guidance/marking-of-fishing-gear-retrieval-and-notification-oflostgear#marking-of-fishing-gear).

The Scottish Ministers have authorised the establishment of a 500-metre radius safety zone around all major maintenance works being undertaken. The safety zones will be active when the jack-up vessel involved in undertaking major maintenance works is attached to, or anchored next to, the renewable energy installation. No more than one 500 metre major maintenance safety zone will be active at any given time.

All mariners are requested to give a wide berth to all vessels involved in the major repair activities.

These works feed into a wider engineering project at the Putney Bridge Pier. The survey will employ the use of a 0.025m2 mini Van Veen grab sampler and small vibrocorer to obtain sediment samples of the seabed. The works will be completed by OEL personnel from OEL’s dedicated survey vessel Coastal Surveyor.

The Edda Freya CSV will mobilise to the Grove G5 (49/10a-4) and Seven Seas 48/7c-13y well locations to undertake decommissioning activities on or around the 4th March 2026.  This date is subject to change depending on weather and operational requirements.  Operations are expected to take a total of 16 days and to be complete by 1st April 2026.

The geophysical survey will be conducted within the Caledonia OWF Site however, as the aim of the survey relates to potential location of wind turbines, no survey operations will occur within the Structure Exclusion Zone (SEZ) in the south east of the site (please see map in attached NtM). Simultanous operations will be undertaken by two vessels to confirm risk of Unexploded Ordnance (UXO) is As Low As Reasonably Practicable (ALARP), and obtain necessary geophysical data.

Caledonia will issue a Weekly Notice of Operations (WNoO) by email and publish on the Caledonia website each Thursday during periods of active survey operations. If you would like to be added to the distribution list, please contact Caledonia Consents (details below).

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The RRS Discovery will be conducting sediment sampling with box core, multicore and SPI camera, and sampling the water column behind a chartered fishing vessel in 4 sites during February and March. An instrumented seabed lander will also be deployed at each of the 4 sites for up to 5 days. These sites are fishing grounds and close to some navigation routes. The RRS Discovery will have restricted manoeuvrability during these operations.

1. Seabed landers - These will be deployed at each site for up to 5 days. The RRS Discovery will remain in the region during the deployment. The seabed lander is an instrumented subsurface buoy reaching 4 metres above the seabed with a 15 m recovery line and pellet buoy attached to the top of it. The system has no surface presence during deployment. We request vessels to not fish close (<200m) to the lander during the deployments. Please contact the RRS Discovery over VHF if needed.
2. Sediment sampling - The RRS Discovery will have restricted manoeuvrability sediment sampling activities in the areas. 
3. Water sampling - The RRS Discovery will have manoeuvrability whilst conducting water sampling with towed instruments and CTD. This will include sampling close to a chartered fishing vessel at each site. 

Our work at each site will occur during these approximate dates.

Site C – Clyde- 26/02/2026 – 02/03/2026

Site B – Western Irish Sea – 03/03/2026 – 08/03/2026

Site D – South of Isle of Man - 09/03/2026 – 13/03/2026

Site A – Cumbria – 14/03/2026 – 19/03/2026

Mariners are advised that from 18/02/26 to 31/03/26, Fugro jack-up barge (JUB) “WaveWalker 1” will be performing nearshore geotechnical borehole investigations. This will be conducted on behalf of the client Scottish & Southern Electricity Networks Transmission (SSENT).

“WaveWalker 1” will be towed between sites and supported throughout by anchor handling

tug/utility vessel “Dutch Power”.

Work sites for “WaveWalker 1” are at Rattray Head (north of Peterhead) and Sinclair’s Bay (Caithness). A decision on which site will be sequenced first is to be made during tow.

At each site three (3) number boreholes will be drilled in order to assess geological conditions. Approximate borehole locations are between 400m and 1,200m from shore.

A 500m exclusion zone will be enforced around the JUB at all times. Vessels are to take caution when navigating in this area and pass well clear of the JUB.

Earliest start (either site) is 28th of February 2026. Precise date dependent on progress of tow which is weather sensitive. This notice may be updated when the worksite sequence is known and / or arrival date better defined. Following completion of operations at first site, the JUB will be towed to the second.

Dear All,

Attached is a Notice to Mariners issued by RWE concerning EXPOSED OR THE RISK OF EXPOSED CABLES within the ROBIN RIGG WIND FARM.

Please Note that the notice that was issued on 31 – 01 – 25 is now rescinded

Please Read the Updated Notice

Regards  :  Tom Watson

Tel……07903 173 624

The HDD Exit Pit site will be appropriately signed, fenced, and house some welfare facilities. Once the site has been established, construction equipment, such as excavators, sheet piles, pumps, and generators will be mobilised on to Talacre Beach. The work is estimated to take~ 7 

Position of the Exit Pit is shown within Section 3 of the attached NtM 

Drone Blade Inspections across 5 x WTG locations operating from Service CTV 

Seaway 7 deployed a Wave Rider Buoy on the 01/05/2025 within the boundary of the East Anglia THREE Offshore Windfarm Array during the Monopile Noise monitoring campaign as referenced in EA3 NTM 026 - 2025 Monopile Installation (Noise Monitoring Buoy Deployment). The Wave rider Buoy will remain on station until the end of the project.

The Wave Rider Buoy is equipped with a flashing yellow light and has a range of four nautical miles.

Recovery and/or periodic maintenance of the Wave Rider Buoy will be notified via future Notice to Mariners

Shetland HVDC Link 1 Cable

Marine Cable Route Survey Operations

Introduction

Mariners are advised that a marine cable operational survey is planned for the Shetland HVDC Link 1 cable. SSEN Transmission has a requirement to complete surveys of operational assets periodically and the marine survey activities for the Shetland HVDC Link 1 are planned to commence on the 14th February 2026. The survey equipment will consist of a towed ROV and there is no requirement for fishing gear to be cleared of the area during the operations.

The survey works are being carried out by Reach Subsea UK Ltd. They are expected to be complete approximately end of 23rd February 2026.

The area of work, pertaining to this Notice to Mariners (NtM) for Shetland HVDC Link 1, is highlighted in Figure 1, with the survey vessels contact details for the project found in Table 1. Contact details for the project Fisheries Liaison Officer (FLO) is detailed below.

Survey Area

Navigational Safety Advice

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

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

Survey Vessels

The survey works are being carried out by using the following vessels:

Survey vessel: Viking Reach (IMO 9489651; MMSI 258647000; Call Sign LARF7)

Vessels and their contact details are given in Table 1 below.

Table 1: Survey vessel details

Contact Details:

Further enquiries should be addressed to the following contacts:

         FLO contact       Kelsey Padgett      

                                    Fisheries.Transmission@sse.com

                                    Mobile: 07879 358908  

Legal Notice:

During the period of this notice, we request that you plan your activities around these short-term, temporary activities. Any failure to remove equipment or entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in SSENT taking further steps.

Survey works to last 14 days.

A single solid streamer of approximately 1,350 m in length will be towed behind the survey vessel during the 2DHR seismic operations.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

Details of the deployment position are provided in the attached NtM. The frame will be deployed for 30 days. 

Partrac is planning to carry out the frame deployment from 8th February 2026 over one day, weather permitting, using the vessel Green Isle (Figure 3). During deployment activities, the vessel will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea. Other vessels are requested to provide a minimum clearance of 50m from the installation vessel during operations, and post-installation, and to pass at a safe speed.

Partrac Ltd., on behalf of South West Water, has deploying metocean equipment within the Plymouth and Tamar estuaries located of the South West of England. The equipment deployed on site include a Seabed frame mooring. During servicing activities, the vessel will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea. Other vessels are requested to provide a minimum clearance of 50m from the installation vessel during operations, and postinstallation, and to pass at a safe speed. VHF Channel 14 will be monitored. by the vessel. Should adverse weather conditions occur during the works the vessel will seek shelter at the master’s discretion.

There will be various vessels associated with the works. 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. Please distribute this information accordingly so that other sea users are aware.

Please contact myself or Chris Butler, Project Manager (Chris.Butler@globalmarine.group) if you have any queries regarding this notification or if you have any information on any underwater activity in this area that is relevant to the operation.

See detailed map on our bulletin website

See detailed map on our bulletin website

The works will be performed in a single campaign, commencing on the 15th of February 2026 continuing until approximately 27th February 2026. The works will be continuous, 24 hours a day. A chart of the DBB offshore area is provided below.

The operations involve the relocation and/or removal of subsea boulders by means of a Remote Operated Vehicle (ROV) around the Wind Turbine Generator (WTG) locations. 

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

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

The following table highlights WTG installation progress and next 7 day forecast.

Vessels operational during these works are as follows:

The exact finish date will be dependent on the prevailing weather conditions and work progress. Mariners are requested to remain where possible 500m from Construction vessels when exhibiting the day shapes / night lights for vessels restricted in their manoeuvrability.

Service Operation Vessels

The Service Operations Vessels (SOV) “Purus Power” & Daughter craft “Purus Transporter” continues to support to the SOWF project throughout the construction of the offshore windfarm.

The SOV 'ACTA Centaurus' and 'Austri Enable continues operations within the Sofia Array.

SOVs shall be transiting to / from the Sofia Array and the port of Blyth / Sunderland throughout this period.

Crew Transfer Vessel

The Crew Transfer Vessel (CTV) MHO Balder continues operations at the Sofia OWF.

All vessels can be contacted on VHF 16 throughout as required. All vessels shall be operating to / from the Port of Hull and will be operational 24 hours / day.

Mariners are advised that a geophysical survey is planned for the Eastern Green Link 5 (EGL 5) project. The marine survey activities for EGL 5 are planned to commence on the 23rd of November 2025 and are expected to complete approximately mid-January 2025. SSEN Transmission and National Grid Electricity Transmission (NGET) are working together to address the need for increased capacity within the transmission network between Scotland and England. EGL5 will help provide increased capacity, carrying up to 2 GW of electricity, enough for two million homes. This will be achieved through a High Voltage Direct Current (HVDC) cable connection between Aberdeenshire and Lincolnshire.The EGL 5 geophysical survey works are being carried out by Ocean Infinity Limited.The area of work, pertaining to this Notice to Mariners (NtM) for EGL 5, is highlighted in Figure 1, with the survey vessels contact details for the project found in Table 1. Contact details for the project Fisheries Liaison Officers (FLO) are detailed below.

See detailed map on our bulletin website

Positions for both North & South weather buoys are identified in the attached Notice To Mariners 005 -2025. There will be periodic maintenance for both weather buoys during construction of EA3.

There is an exclusion zone of 100m around the weather buoys, mariners are  advised to abide by the 100m safety zone and navigate with caution at all times.

Norside Supporter Will be Bolting and Grouting 95 monopiles and transition pieces at the WTG locations set out in section 2.2 of this document. It is currently anticipated that weather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week)

Spirit Energy intend to conduct a debris clearance geological seabed survey at the Seven Seas well 48/7c-13y on or around 15th February 2026.  The survey will be undertaken by the Ocean Researcher MV and is expected to take approximately 2 days.  This date is subject to change depending on operational requirements.

Spirit Energy intend to conduct a debris clearance geological seabed survey at the Grove G5 well 49/10a-4 on or around 15th February 2026.  The survey will be undertaken by the Ocean Researcher MV and is expected to take approximately 2 days.  This date is subject to change depending on operational requirements.

Seismic source to be deployed by crane from the Elgin platform, for a 1-well Vertical Seismic Profile (VSP) on the B5 well. All operations to occur within Elgin 500m zoneEstimated duration of acquisition is 12 hours, not including weather standby. 

A scheduled service from an assigned pool of Platform Supply Vessels providing supplies to the Offshore Converter Platform & JUV until further notice.  Those nominated vessels are:

• Bos Pool;
• Bos Base;
• Dina Merkur;
• Dina Supporter;
• Dina Supplier;
• Dina Scout;
• Highland Knight - Circa February 2026 (TBC)

An eight legged jacket with 8 driven pin piles has been installed as a foundation for the OCP followed by the OCP itself.

The Sofia Offshore Wind Farm Boundary Co-ordinates where the works will take place are provided below.  All non-project vessels are requested to remain outside this area.

Mariners are requested to remain where possible 500m from vessels. During these works, SOVs will have restricted manoeuvrability and shall also be exhibiting the correct day shapes/ lights and flag for vessels engaged in diving operations and restricted in ability to manoeuvre.

Emergency Response & Rescue Vessel

The EERV Putford Jaguar is supporting the commissioning phase of the Offshore Converter Platform, providing close standby cover as required during overside works.

Service Operation Vessels

The Service Operations Vessel (SOV) “Purus Power” & Daughter craft “Purus Transporter” continues to support the SOWF project throughout the construction of the offshore windfarm.

The 'SOVs' ACTA Centaurus and Austri Enabler continues operations within the Sofia Array.

SOVs shall be transiting to / from the Sofia Array and the port of Blyth / Sunderland throughout this period.

Crew Transfer Vessel

The Crew Transfer Vessel (CTV) MHO Balder continue operations at the Sofia OWF. 

All Mariners are advised to always give a wide berth of approx. 500m metres from the above vessels. The vessels shall be exhibiting the correct day signals / night lights for the operations as defined by COLREGS and can be contacted on VHF 16 for further information as required reference proximity / nearby operations etc.

See detailed map on our bulletin website

OverviewMariners are advised that North Falls Offshore Wind Farm (NFOWF) will undertake a metocean survey within the Wind Turbine Array Area, at the Primary and Secondary locations shown in Table 1 and Figure 2.

Survey Duration Mobilisation will commence on or after 18 February 2026, with the metocean survey lasting between 12 and 18months. The planned survey end date will be no later than 16 August 2027.

Survey Tasks The metocean survey work is being undertaken by Partrac, who will use the vessel CT Vector to deploy the metocean equipment at the Primary and Secondary locations shown in Table 1 and Figure 2. It is expected that the deployment operation will last for one day.

The metocean equipment will consist of one seabed frame deployed at each location (i.e., a total of two seabed frames). Each seabed frame will be equipped with an acoustic Doppler current profiler (ADCP) and additional sensors (temperature sensor, water-level sensor, and turbidity sensor). Each seabed frame will be connected to a clump weight, with approximately 100 m leaded polypropylene ground line between the seabed frame and clump weight.

As a consequence of equipment being deployed, all mariners are advised to keep a safe clearance distance of no less than 500 m from the deployment vessel and metocean equipment deployment locations. No towed survey equipment will be deployed from the vessel.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

All mariners and stakeholders are advised that maintenance works will be carried out on seven of the Inch Cape demarcation buoys.

The marine lanterns will be replaced on the seven buoys noted in the attached NTM.

The multi-cat vessel Aurora Venture will arrive at the Inch Cape site on or around the 12th of February, weather permitting.  On completion of the maintenance the buoys will be re-deployed.

See detailed map on our bulletin website

See detailed map on our bulletin website

EGL2 are due to commence an unexploded ordnance (UXO) target investigation ROV survey on the 14th of September 2025.

The works are to be conducted within the Exclusion Blocks shown by Figure 1, and updated coordinates are detailed in Table 1, both given below.

The works consist of an ROV carrying out visual target investigation for the purposes of identifying potential unexploded ordnance, small excavations on the seabed may also be undertaken to identify targets. There will also be a small amount of debris recovery required depending on what is found during the investigations.

The work is estimated to finish on approximately the 28th of February 2026, subject to weather.

Works are being undertaken under an approved Marine Licence from the Marine Directorate (MS-00011033) and the approved Marine Licence from the Marine Management Organisation (L/2023/00211/2)

There will be no unexploded ordnance detonations performed; this is investigation works only.

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Partrac Ltd., on behalf of South West Water, is deploying metocean equipment within the Kingsbridge and Salcombe estuaries located of the South West of England. The equipment deployed on site include two Seabed frame moorings. During servicing activities, the vessel will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea. Other vessels are requested to provide a minimum clearance of 50m from the installation vessel during operations, and post installation, and to pass at a safe speed. VHF Channel 16 will be monitored. by the vessel. Should adverse weather conditions occur during the works the vessel will seek shelter at the master’s discretion.

 Jack up Location    GAB03    Gear Box    51° 46.518' N    1° 56.411' E

Jack up Location    GAD03    Gear Box    51° 47.365' N    1° 59.117' E

Jack up Location    GAE05    Gear Box    51° 45.881' N    1° 58.654' E    

Jack up Location    GAF01    Main Bearing    51° 47.173' N    1° 59.910' E

Jack up Location    GAF05    Gear Box    51° 45.077' N    1° 58.938' E

Jack up Location    IGD02    Generator    51° 57.882' N    1° 55.108' E    

Jack up Location    IGF03    Gear Box    51° 55.692' N    1° 56.351' E

Jack up Location    IGI01    Main Bearing    51° 57.702' N    1° 59.885' E

Jack up Location    IGI06    Generator    51° 54.690' N    1° 58.026' E

Jack up Location    IGK03    Main Bearing/ Gear Box    51° 52.817 N    1° 58.188' E

Jack up Location    IGL01    Gear Box    51° 53.784' N    1° 59.783' E

Jack up Location    IGC06    Generator    51° 54.486' N    1° 52.373' EJ

ack up Location    TBC    Generator    

Start date approx 5th February 

Support CTV TBC 

See detailed map on our bulletin website

See detailed map on our bulletin website

The notice provides boundary areas for beam trawl and otter trawl stations; within each area we sample at multiple stations. .  Within the beam trawl areas there are also a total of 55 corer stations.  Please see the word documentat attached for the full co-ordinate lists and maps.

The survey aims to obtain information on:a) Distribution, size composition and abundance of all fish species caught.b) Age – length distribution of selected species.c) Distribution of fish in relation to their environment.d) Distribution of macrobenthos and anthropogenic debris.e) Surface and bottom temperature and salinity data using ESM2 profiler/mini-CTD logger and Niskin Bottle.f) Length weight & maturity information using individual fish measurements, in support of the EU Data Regulation.                                                                                g) Collect core and grab samples for carbon analysis

Partrac Ltd., on behalf of Jan De Nul and Southern Electricity Networks (SSEN), deployed a metocean seabed frame mooring at three landfall sites for an interconnector cable project between NW Skye and South Uist. The seabed frame sites are located in Holmar Bay (Uist), Ardmore Bay (Skye) and Meanish Pier in Loch Pooltiel (Skye), and each frame is deployed for 30 days. Partrac is planning to recover the frames from 04/02/2026 over two days, weather permitting, using the vessel Alyssa.  During recovery activities, the vessel will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea. Other vessels are requested to provide a minimum clearance of 50m from the installation vessel during operations, and post-installation, and to pass at a safe speed.

CTV - HST Tynemouth supporting service operations over the summer months commencing 1st March 2026 

NKT will conduct Seabed Rock Installation (SRI) at the East Anglia 3 Export Cable Corridor using the vessel DPFPV Rollingstone. Operations will be conducted continuously, 24 hours a day. The work will be performed in a single campaign. 

Rock will be placed on the export cable at remedial locations. In/out surveys will be performed prior to and following rock placement. 

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

To protect the cable in the working corridor, guard vessels will be deployed along the Export Cable Route (described in EA3 NTM 065 -2025- Export Cable Guard Vessel Deployment) The guard vessels will contact vessels approaching within 1.5Nm

THe DSV Seven Kestrel is due to mob round about 24th Februay 2026 for about 4 days works in the Dana Bittern and Gannet E fields.

See detailed map on our bulletin website

Cable Ship PIERRE DE FERMAT is involved in subsea cable repair.

In this area : 

Point A : L = 50°34.0'N - G = 000°20.0'E

Point B : L = 50°34.0'N - G = 000°23.0'E

Point C : L = 50°33.0'N - G = 000°20.0'E

Point D : L = 50°33.0'N - G = 000°23.0'E.

CPA 0.5 NM requested.

Yellow special buoys with yellow flashlights will be used.

ROV will be used.

The timing of the inspection and remedial works is subject to vessel availability and weather conditions. This Notice shall be updated accordingly should there be a change to the proposed activity or on completion of works.

See detailed map on our bulletin website

This will be conducted on behalf of Scottish & Southern Electricity Networks Transmission SSENT).Twice Daily crew transfers from Stornoway and Ullapool to the Aran 250 using a 12.5m CTV “Vigilant”. Towing of the jack-up to/from the work site at the start and end of project and subsequent moves between locations on-site. This will be conducted using the Leanne P. This phase of these works requires a Jack Up Barge (JUB) Aran 250 to be positioned for borehole sampling in the landfall(s) located at Arnish Point and Dundonnell within Little Loch Broom.A 200m exclusion zone will be enforced around the JUB at all times. Vessels are to take caution when navigating in this area and pass well clear of the JUB. The second round of programmed works will commence at Arnish from 1 January, 2026.

A crewed Support Vessel will be chartered throughout the survey to support the USVs with departures and arrivals from Burray Boatyard and assist if a technical issue occurs.

Operations are expected to commence 13 December 2025. It is expected that the survey activities shall be completed by the 19th February (subject to weather).

Fishing Gear Clearance: Fishing gear clearance is requested within the NtM area between 13th and 19th February 2026

Please see the attached NtM for further details. 

See detailed map on our bulletin website

The geotechnical works will deploy equipment to test and sample the seabed at intervals across the full route corridor. The environmental works will deploy a towed camera system and collect samples of the seabed at intervals along the route corridor. The vessel will be operational 12hrs a day with it then going alongside in Scapa Pier or Holm Pier each evening.

Dates/Duration: Vessel operations are expected to commence from 31st January 2026. It is expected that the survey activities shall be completed by 14th February 2026 (subject to weather conditions) for both scopes referenced above.

During recovery operations following completion of metocean data collection at the Muir Mhor site, the seabed frame was unable to be recovered. Seabed frame recovery was not possible due to transponder onboard vessel being unable to make a connection with acoustic receiver on the seabed frame. It is not yet confirmed whether the seabed frame is in the deployed location and is simply damaged, or whether it has been moved. 

See attached photo for details of the frame.

Last known location of the seabed frame is the deployed location as per coordinates given in this notice.

Report has been made to Marine Directorate on 22/07/2025. Further updates on recovery will be posted to a separate notice (ID-5431).

Search and recovery scheduled for November 2025 to April 2026.

The westerly exposure is 26m long, the easterly is 27m long.

Full multi-beam bathymetry survey of the 4 London Array export cables. The survey will commence out of Ramsgate with the vessel making its way around the headland for access to the export cables. The survey should take 10 days, exclusive of weather. The data will be acquired onboard the Spectrum 2, a 21m catamaran. Currently there is no towed equipment on the vessel (updates will be made to the notice if it is required). 

JUV Wind Energy on site replacing a major component at one asset  WTG GN-C2A

See detailed map on our bulletin website

Arthur - Remedial Cutting at former wellheads, former manifold and umbilical

E&A Well 49/29a-7 - Mattress Recovery

Leman 27 J - PL206 & PL207 Subsea Cutting

Inde 18A - PL76 Remedial Cutting & Inde 18 A Debris Removal

Davy North & East - Remedial Cutting & Debris Removal

See detailed map on our bulletin website

Vessels shall be monitoring channel VHF 16 and shall be displaying the relevant day shapes / night lights when restricted in its ability to manoeuvre.

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

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

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

The table below provides detail of Seabed Met-Ocean Buoy Moorings that remain in place at SOWF (Excluding Buoy).

See detailed map on our bulletin website

This is to raise awareness of the upcoming turbine retrofit works that will be taking place within the Moray Offshore Windfarm (West) Limited (Moray West). Works are due to commence on 11th February 2026 for approximately 5 weeks. Service Operations Vessel (SOV) Norwind Hurricane will be on site for the duration to complete a retrofit on all 60 turbines.

NKT will perform Rock Filter Unit (RFU) installation at the East Anglia 3 Offshore Converter Station using the vessel Olympic Taurus. Operations will be conducted continuously, 24 hours a day. The work will be performed in a single campaign. RFUs will be installed at the export cable free spans exiting the platform. In/out surveys will be performed prior to and following placement.

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

See detailed map on our bulletin website

Mariners are advised that post-lay burial cable protection works are due to commence along the NeuConnect UK cable route. Works will be conducted by Prysmian PowerLink and supported by their subcontractors.

Post-lay burial cable protection works will be undertaken at cable joints and any locations where the cable is not at the desired cable burial depth, using a jetting tool on board a trenching support vessel. Where this does not achieve the required burial depth, a Controlled Flow Excavator (CFE) will be used. The precise location where post-lay burial is required will be dependent on data from accompanying survey activity, which will be ongoing throughout the works.  

Post lay burial protection operations will take place between the following locations set out in the attached Notice to Mariners (Table 1), commencing from 15 September 2025. Dates are subject to change due to weather or operational requirements.

Post-lay cable protection locations for cable crossings are detailed in the attached Notice to Mariners (Table 2). The crossing protection operations will take place for approx. one week from 15th December 2025. Dates are subject to change due to weather or operational requirements.

Guard vessels are planned to patrol the route sections where the cable is exposed (cable crossings) or at inadequate depth until cable protection works are completed. Guard vessels will not operate within the Outer Thames SPA (KP 5 to KP 81) between 01 November 2025 to 31 March 2026.  

A78-02 shall be conducting ROV based geophysical surveys at approximately 1.5 knots using multibeam echosounder and sidescan sonar. The survey shall also comprise an environmental survey, of up to 12 stations. At each station the vessel shall complete ROV video transects and grab samples  

Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre. 

A78-02 shall be conducting an environmental survey in the Don Field. The survey shall comprise:

- ROV based geophysical surveys at approximately 1.5 knots using multibeam echosounder and sidescan sonar. This survey shall cover the former 500m zone and pipeline corridor between Don and Thistle. 

- Environmental survey, of up to 24 stations. At each station the vessel shall complete ROV video transects and grab samples. 

- ROV general visual inspection at the former Don Platform location.

Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre. 

Harris and Barra fields are located in Block 201/24a of the UKCS, 160km to the East of Shetland, and apprcximately 500km North-North East of Aberdeen. The water depth in the area varies from approximately 150m to 165m. The Western Isles production storage and offshore vessel (FPSO) has been disconnected and offstation, but production trees and water injections trees via 9-off flexible risers, 2 -off dynamic umbilical's, 2 -off bundle systems with associated spools and jumpers, 2- off mid-water arches (MWA), FPSO mooring piles, concrete mattressess remain on location. Boka Northern Ocean will carryout some of the decommissioning works commencising in early April for up to 90 days on location, note only ROV's operations from the CSV Boka Northern Ocean for this part of the project.

Rock Filter Units (RFUs) will be over boarded from the Siem Stingray and will wet store circa 350 x 8Te RFU’s across the East Anglia THREE Offshore Windfarm area. Siem Stingray is expected to mobilise and commence loading operations from the Port of Great Yarmouth circa 06/02/2026.

Siem Stingray will monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operations. It is currently anticipated that weather permitting, works will be conducted on a continuous basis (i.e.,24- hour working, seven days a week) unless notified otherwise.

For further information regarding rock bag installation works, please see attached East Anglia THREE Notice To Mariners 002 2026- Rock Bag Installation.

Service of 12 and recovery of 5 Passive Acoustic Monitoring (PAM) Stations that have been deployed on the seabed in and at locations around the East Anglia THREE Offshore Windfarm Area.

The PAM stations will remain on the seabed until approximately the 31st of October 2027. Currently, all but one PAM stations have 12 m height above the seabed, weighing up to 600 kg and their location is not marked by a surface buoy. There will, however, be three new moorings deployed with large buoys at the surface and anchored to the seabed by two 2 tonne anchor mooring weights. 1 of 3 was deployed on 20-01-2026.

For more information regarding PAM station servicing works, please see attached East Anglia THREE Notice To Mariners 001-2026 Marine Mammal Monitoring -Passive Acoustic Monitoring Stations (Servicing, Deployment And Recovery.

As part of its Water Resource Management Plan for the period 2025 to 2050 (WRMP24), Anglian Water Services has investigated and developed alternative water supply options which includes the abstraction and desalination of seawater. In service of this effort, Atkins-Realis, on behalf of Anglian Water, is coordinating the deployment of a water data buoy to collect water quality data off Lincolnshire at Mablethorpe, and off Norfolk at Bacton for a period of twelve months, commencing on 17/08/2025. The intention is to rotate the buoy between the sampling locations at three-month intervals. The equipment deployed will include a  floating NexSens CB-450 Data Buoy secured by a seabed mooring system. 

Seabed users are politely requested to avoid this areas due to the risk of snagging any equipment in contact with the seabed.

Scottish & Southern Electricity Networks (SSEN) wish to inform Mariners of the completion of marine works in the near-shore area off Warbeth, Orkney which forms part of the Orkney -Caithness HVAC Link  Project.  The completion of this work includes the installation of two subsea assets in the form of two ducts and associated rock bags approx 1km SW of Warbeth Beach, Orkney and have been placed with in the boundaries of the  4 points and associated coordinates  detailed in the attached NTM. The works have resulted in a reduction in charted water depth. 

 Mariners are advised to stay well clear of the area as detailed until further notice.

The Swift 10 will arrive arround January 27th to Plug and Abandon the wells and pull the conductors on the Sean Papa manned platform.  The platform and rig will work in combined operation.The process will involve the MODU being towed to location, it will be  positioned temporarily at stand-off position then anchors will be run to move MODU into final position.

The Swift 10 is a MSC SEA-2750 self-elevating unit .  Aids to Navigation are listed as:- AIS, DSC MF/HF, VHF System, ER VHF Portable and RT/DSC, EPIRB,GPS/DGPS, Inmarsat C/ECG, GMDSS PRINTER, VSAT, LRIT, NAVTEX, SART, SSAS

The Rig Move procedure is in conjunction with the Marine Operations manual.  Required rig move notifications will be made prior to the move. 

The navigation lights on the Swift 10 are not able to be synchronised with the Sean PP. Navigation lights for both the Swift 10 and Sean Papa platform will remain turned on.

Confirmed Unexploded Ordnance within the East Anglia Three CDM boundaries of the offshore windfarm array and export cable route.

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:

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

Navigation Warning - 08th January 2021

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

53° 30.442N 000° 50.564E

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

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

Navigation Warning - 16th March 2021

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

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

All mariners and stakeholders are advised that the recently installed temporary navigation light on the P32 monopile has been reported as unlit.

Venterra are planning to deploy two Floating LiDAR Buoys in the area around the NOAH Met Mast. Deployment operations are expected to take place on or around Monday 02nd February 2026, weather permitting. The two buoys will remain on station for a minimum of 1 month.

Marine users are advised to always maintain a 500m separation from each buoy and operational vessel at all times.

The survey will employ the use of various fishing methods (fish traps, jigging, creels, and potential sole nets and otter trawling), a 0.1m2 Day grab to obtain sediment samples of the seabed, as well as Niskin water sampling devices and plankton netting. The works will be completed by personnel from OEL on the vessel Solstice BF56. During deployment of equipment the vessel will be under restricted manoeuvrability and require sufficient clearance for safe working. During periods of poor weather, the vessel may return to port or alternative safe haven for shelter.

Njord Survey AB will carry out a multibeam echosounder (MBES) survey to identify objects on the seabed within the survey area. Operations will be conducted from the survey vessels Northern Gale and Northern Remote. Survey activities are planned to commence on Monday the 19th, subject to weather conditions.

Mariners are requested to maintain a safe distance from the survey vessels, which may have restricted manoeuvrability during survey operations.

Last known location of the seabed frame is the deployed location as per coordinates given in this notice. Please ensure fishing gear is at a safe distance to avoid entanglement. Acitivities will commence in November through January 2026, with a weather window expected to allow operations from 17th January 2026. Vessel mobilisation port is expected to be Peterhead Port.

Notice Update 15/01/2026 for vessel details: Vessel is Gaoth na Mara, IMO9679737, vessel bridge mobile +447498176389.

We request marine users to remain 500m away from all assets and ensure fishing gear is at a safe distance to avoid entanglement. MARINERS ARE REMINDED to navigate with caution and keep continued watch on VHF Ch. 70 / 16 when navigating the area.

Note: this notice is a replacemnt for Notice ID5300 which was originally submitted 26th August 2025.

The Seabed Frame search will involve a drop-down camera or ROV for subsea visuals, with a search area around the deployed location. Upon locating the Seabed Frame, retrieval will be undertaken.

The following equipment will be recovered from site:

• 1 x Floating LiDAR (FLS)
• 1 x Subsea mooring
• 1 x Wave buoy
• 1 x Guard buoy

All vessels are requested to maintain a 500m exclusion zone around the location.

Re-deployment of our offshore floating buoy with racks loaded with coated coupons. The buoy will be re-deployed at the earliest weather opportunity after the 26/01/2026. This is a one day task. The buoy will remain at the location shown until winter 2026.

The purpose of the buoy is to test and ascertain the effectiveness of various marine coatings in a harsh marine environment. The buoy is visited monthly to sample the coated coupons and inspections are carried out to ensure the buoy is safe to remain on station.

The buoy will be lowered into the water at Shorestore Marina and towed by the Plymouth Quest vessel to the deployment area shown in the map. The vessel will then lower the anchor to a depth of 50m to the seabed and attach the chain link to the buoy to reduce disturbance. The buoy has a mooring system comprising of a 0.8 tonne (T) pivoting anchor and 100m of 50 millimetre (mm) chain. The anchor chain is connected to a 12m bridle consisting of 50mm heavy chain using a shackle rated to 12T.

SLB will be conducted between KP4.0 – KP148.0, Inspection operations will be performed at third-party asset locations where applicable. 

During operations, NKT Victoria will have restricted manoeuvrability as defined under COLREGs (International Regulations for Preventing Collisions at Sea, 1972). The vessel will display appropriate day shapes and lights and will transmit an Automatic Identification System (AIS) message.‘NKT Victoria’ will monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operation.

It is currently anticipated that, weather permitting, works will be conducted on a continuous basis (i.e., 24-hour working, seven days a week).

For further information regarding export cable installation operations, please see attached East Anglia THREE Notice To Mariners: EA3 NTM 53/2025- Export Cable Installation.

See detailed map on our bulletin website

See detailed map on our bulletin website

As required by the Fisheries Code of Practice, Masters of dredging vessels will call up on VHF channel 16 when approaching the dredging area at a range of 10 nm (approximately 1 hour before operations are to commence) and will provide an estimated time of arrival on the area and position of operation. A VHF working channel will be established between the dredger and fishing vessel(s) if required. 

The campaign will commence on the 20th of January 2026 and continue until approximately 20th of February  2026. The works will be continuous, 24 hours a day. Charts of the DBC array area are provided below.

The operations include the post lay burial operations for part of the array cable routes, by means of jetting in order to protect the inter-array cables.

During operations, the North Sea Enabler 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 TSV and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.

All works will be continuous, 24 hours a day. Charts of the DBC array area are provided below.

During operations, NORSIDE CETUS 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.

·       The steel wire rope sections are assumed to be remnants of discarded trawl wire or anchor cable and are now partially exposed above seabed level.

·       The wire does not pose a hazard to general navigation.

·       However, it may present a risk to small vessels when anchoring or operating gear near the seabed.

·       A substantial amount of wire remains buried beyond each of the location ends detailed below.

·       The steel wire rope sections are assumed to be remnants of discarded trawl wire or anchor cable and are now partially exposed above seabed level.

·       The wire does not pose a hazard to general navigation.

·       However, it may present a risk to small vessels when anchoring or operating gear near the seabed.

·       A substantial amount of wire remains buried beyond each of the location ends detailed below.

Details:

· The SWR section is assumed to be a remnant of discarded trawl wire or anchor cable.

· The wire does not pose a hazard to general navigation.

· However, it may present a risk to small vessels when anchoring or operating gear near the seabed in close proximity to the locations detailed in the table below.

· There was an extensive length/volume of SWR recovered during UXO TI investigations. The Glomar Wave was not able to safely bring this on deck, so it was placed atop the SWR that it was connected to.

· SWR was placed here for wet store until further notice.

• The steel wire rope sections are assumed to be remnants of discarded trawl wire or anchor cable and are now partially exposed above seabed level.
• The wire does not pose a hazard to general navigation.
• However, it may present a risk to small vessels when anchoring or operating gear near the seabed.
• A substantial amount of wire remains buried beyond each of the location ends detailed below.

The steel wire rope sections are assumed to be remnants of discarded trawl wire or anchor cable and are now partially exposed above seabed level.

The wire does not pose a hazard to general navigation.

However, it may present a risk to small vessels when anchoring or operating gear near the seabed.

A substantial amount of wire remains buried beyond each of the location ends detailed below.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

Scheduled potential UXO investigation works are due to commence along EA2 Export cable corridor and offshore wind farm CDM area. These works will be carried out using the Northern Victoria and JU Wind vessels. 

Scheduled vessel dates are as follows...

Glomar worker mobilise on 14/09/25 - completing 10/01/26 

Northern Victoria mobilise on 09/01/26 - completing mid Feb 26 

Tor Boreas dive support vessel mobilising on 20/09 - completing 19/01/26

JU Wind dive support mobilising on 19/01/26 - completing mid Feb 26

TheNortthern Victoria will identify targets in the OWF & ECR and Ju Wind will identify targets nearer to shore in ECR

Mariners are advised that a geophysical survey is planned for the Eastern Green Link 5 (EGL 5) project. The marine survey activities for EGL 5 are planned to commence on the 12th of January 2026 and are expected to complete approximately end of February 2026.

Eastern Green Link 5 Geophysical survey area consists of multiple Notice to Mariners referenced below (this notice is highlighted in bold):

NtM_EGL5-SSEN-MAR-XX-CO-MC-004

NtM_EGL5-SSEN-MAR-XX-CO-MC-001 - Geophysical survey area outside 12nm

EGL5-SSEN-MAR-XX-CO-MC-002 – Geotechnical survey area outside 12nm

SSEN Transmission and National Grid Electricity Transmission (NGET) are working together to address the need for increased capacity within the transmission network between Scotland and England. EGL5 will help provide increased capacity, carrying up to 2 GW of electricity, enough for two million homes. This will be achieved through a High Voltage Direct Current (HVDC) cable connection between Aberdeenshire and Lincolnshire.

The EGL 5 geophysical survey works are being carried out by Ocean Infinity Limited.

The area of work, pertaining to this Notice to Mariners (NtM) for EGL 5, is highlighted in Figure 1, with the survey vessels contact details for the project found in Table 1. Contact details for the project Fisheries Liaison Officers (FLO) are detailed below.

On behalf of Inch Cape Offshore Ltd, Enshore shall continue burial of export cable sections 1,2 & 3 from Cockenzie, East Lothian to the Inch Cape offshore substation.

The trenching vessel, CMOS Installer shall utilise a jetting burial tool and a remotely operated vehicle (ROV) to bury the cable. Cable burial operations are expected to continue until February 2026.

All seven rock bags placed on the seabed at the Cockenzie cable landfall site have been recovered from their locations as shown in fig 2.

On behalf of Inch Cape Offshore Ltd, the Offshore Energy Group Ltd. has serviced and redeployed five submerged Passive Acoustic Monitor mooring devices along the east coast of Scotland, within 2 km of the coast, between St Andrews Bay and Inverbervie. The PAM array will remain in situ for 2 years with a service interval every 3 months. The moorings will not be surface marked as the top of the mooring extends approximately 4-7m above the seabed.

Lost acoustic monitor devices

Please note that during the servicing works, two acoustic moorings were lost during recovery at the original location of the initial deployment in August 2025, it is unlikely this equipment will be retrieved. Coordinates for the lost equipment are noted below.

Sofia OWF continue to evaluate the exposure risks and will update accordingly. 

At this this time, it is important to note that the cable is sensitive to any external impact and constitutes a SUBSEA SNAGGING RISK for anchoring, fishing gear or other equipment with seabed intervention. Seabed activities should be avoided within the designated area until further notice. 

The guard vessel 'Enterprise II' continues monitoring operations within the Sofia Export Cable Corridor between KP4 & KP90 and shall be monitoring VHF 16 during their scope of the works.

The survey will acquire seabed sediment samples using a Hamon grab and will be completed by personnel from Ocean Ecology from the vessel Seren Las.

The primary purpose of the guard vessels is to protect the exposed cable along the East Anglia 3 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. 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

A temporary safety zone extending +/-1000 metres either side of cable route centreline has been requested for all fishing activities. The cable, in many areas, is currently laying unprotected on the sea floor. The coordinates of the laying campaign saftey zone is shown within this KingFisher Notice; additionally, the cable centreline waypoints are provided in Appendix 1 of the attached document.

Guard vessels will be onsite throughout operations. During the operations the vessels will keep a listening watch on VHF channel 16 and will actively transmit an Automatic Identification System (AIS) signal. The vessels will broadcast daily, and at shorter intervals as may be required by passing traffic, the vessel position, operations information, and planned operations for the next twenty-four hours. 

For further information please see the attached Marine Notice. 

See detailed map on our bulletin website

Cable laying operations will be conducted within the East Anglia THREE Offshore Windfarm by CLV Seaway Aimery. The vessel will install subsea cables between WTGs and the Offshore Converter Station (OFCS). During cable deployment, the vessel will be restricted in its ability to manoeuvre.The Seaway Aimery will carry out cable laying activities, and be supported by the Seaway Moxie, which will undertake equipment and personnel transfers to WTGs and the OFCS via a Walk to Work (W2W) gangway system. While conducting these transfers, the Seaway Moxie will also be severely restricted in manoeuvrability.

For further information regarding Inter Array Cable Installation Operations, please see attached East Anglia THREE Notice To Mariners 083-2025 Inter- Array Cable Installation.

On behalf of Inch Cape Wind Ltd. Jan de Nul will commence the installation of wind turbine generator foundation monopiles. The monopile components will be transported from the Port of Leith to the Inch Cape site and installed at 54 locations within the wind farm boundary.

The installation vessel Les Alizes is expected to arrive at Inch Cape to commence operations on or around the 25th of December. Each monopile will be installed with a lit temporary navigation structure, the light shall exhibit Flashing (Fl) Yellow (Y) 2.5 seconds (s) 

Monopile installation is expected to continue until May 2026.

See detailed map on our bulletin website

See detailed map on our bulletin website

The Autonomous Underwater Vehicle will be deployed near shore and will navigate inside the study area (see attachment) for a period of 2-4 months. Every 2-4 months the AUV will be recovered and replaced with a new AUV that will again navigate the study area. This routine will continue for a year.

See detailed map on our bulletin website

Northern Gale, Northern Storm, Northern Remote and Northern Breeze will, at different times, perfom Hullmounted MBES surveys to update nautcial charts from late December to February 2026. 

UKCS Block ID: 211/13a and 211/14a 

Water Depths refer to Lowest Astronomical Tide (LAT) with all depths quoted in metres. 

No visible marker (marker buoys) will be deployed. 

Schematic drawing has been attached.

Mariners are advised to exercise caution in the vicinity of the identified locations and to avoid anchoring directly over the affected area. Additionally, mariners are advised to maintain a safe distance from the vessel, Glomar Wave, while it is conducting UXO target investigations. A 500m Exclusion Zone around the UXO position has been enacted. Mariners are advised to observe this measure to ensure safe navigation and to avoid any potential hazards.

Works to be carried out outside of channel but a split hopper barge will be operating between the Dredge site (Marchwood ERF SWintake) and the Nab spoil ground once per day. Divers will be in the water periodically throughout the duration of the dredging soreduced wash in the vicinity should be in place

The cut-point of PL24 is exposed and is protruding significantly from the seabed; approximately 6m from the seabed at its highest point and overhanging approximately 18m long from where the line makes contact with the seabed again. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

WGS84:  57° 09' 09.792''N, 002° 15' 28.554'' E

Clump weight: 500 kg steel ballast with mooring line attached

Deployment date: 02/10/2025

Clump weight: 500 kg steel ballast with chain

Deployment date: 26/08/2025

Radius cone: ~120m  

Model: Datawell DWR Mk3 buoy

Diameter: 0.9 m

Colour: yellow

LED light: 5 flashes in 10 s 20 s repetition 360° around for 4 Nm distance

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

Continuation of Jackdaw Installation 2025/2026

New SSIV, tie-in spools and associated protection will be installed in the Jackdaw 500m zone between the Jackdaw Wellhead Platform and the new pipeline which was installed in 2024.

Sleipnir with associated barge and tugs working in and around the Jackdaw 500m safety zone. 

New electro-hydraulic umbilical and associated protection will be installed between Jackdaw Wellhead Platform and New Jackdaw SSIV.  Cooling Loop may be cleaned if required.

Sat 1st of November 2025 - The Deep Arctic vessel will carry out 4 hours of DP trials.

See detailed map on our bulletin website

See detailed map on our bulletin website

The jack-up vessel ‘JB 120’ will be positioned next to the East Anglia THREE OFCS within the East Anglia THREE Offshore Windfarm area.

• Rig move: The vessel will be maneuvered to its designated location.
• Jacking-Up Procedure: The vessel will be temporarily soft jacked on a safe stand-off position, from where its four anchors and mooring lines will be deployed. The deployed mooring lines will be used to move the vessel safely towards the final position, where the vessel will be jacked.
• Operational Phase: Once jacked up, the vessel will remain stationary for an estimated six months.

During operations, the ‘JB 120’, ‘CENTAURUS’ (Lead tug), ‘FAIRPLAY 62’ (Assistant tug) and ‘FAIRPLAY 32’ (Assistant tug) 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.

A Statutory Safety zone of 500m radius will be in place around the ‘JB 120’ at all times.

‘JB 120’ and supporting tugs are supplied with VHF multi-channel radios and mobile phones.

The works will be performed in a single campaign, commencing on the 7th of December 2025 and continuing until approximately Q4 2026. The works will be continuous, 24 hours a day. The operations will include visual inspections and remedial maintenance at the Offshore Substation Platform (OSP) and at installed WTG foundation locations. During operations, the IWS Sun Walker will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. It is requested that all vessels maintain a minimum of 500m separation distance from the SOV and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working area.

THV Patricia has relocated the EA3 East 1 Buoy, EA3 East 2 Buoy, EA3 East Buoy 3 and the EA3 Special 3 Buoy marking the boundary of the East Anglia THREE Offshore Windfarm Array.

The demarcation buoys will remain on station throughout construction of the East Anglia THREE Offshore Windfarm.

For futher information regarding East Anglia THREE aids to navigation, please see attached EA3 Notice To Mariners 080- 2025 - Aids To Navigation – Demarcation Buoys.

The Vessel Armada 78 will be carrying Inspection Operations (Wells, Subsea Structures & Pipelines) in the vicinity of and between the locations noted below:

UPDATE - MOB DELAYED Dates Now = 18th September to 27th November 2025    (Approx 70 Days))

UPDATE: Project running over schedule  : Now extended until Feb 2026

See detailed map on our bulletin website

See detailed map on our bulletin website

Risers, tie-in spools, manifolds and mid-water arches will be recovered from the seabed. The surface laid pipeline bundles serving the North and South drill centres will have appurtenances removed from their upper surfaces, but will remain in place until a decommissioning option is finalised. Wellheads will be left in place with existing fishing protection structures pending a future plug and abandonment campaign.

New rock armour will be deposited to protect exposed pipeline bundle ends at the North and South Drill Centre and North and South Riser Base locations.

Work is on hold over Winter 2025/2026. A guard vessel will remain on site (weather permitting) over this period. Work will resume in Spring 2026.

See detailed map on our bulletin website

The Marine Characterisation Research Project (MCRP) is an innovative research and development project that will ensure the safe phased deployment of tidal
energy turbines in the Morlais Demonstration Zone (MDZ). Working with a team of experts, the project are developing an Environmental Monitoring and Mitigation Plan to safeguard marine wildlife. The findings will subsequently be available for future marine renewable energy projects to enable the growth of tidal stream energy.

The aim of the project is to facilitate environmental data collection, and support research and development of turbine centred monitoring and mitigation devices. The knowledge gained will enable the safeguarding of wildlife during the development of the MDZ.

To best exploit the opportunity available to gather valuable and relevant information, the MCRP procured a scientific lidar research buoy, upon which the MCRP have deployed data collection equipment, in order to gather baseline data from the MDZ and test the equipment.

Following a successful refit in the port of Holyhead during November 2024, the Marius buoy had been redeployed in the Morlais zone for a further 12-month period of data collection.

Following this the decision has been made to extend the deployment for a further 6 month period to support refinement of the technologies, and enable in situ demonstration.

On behalf of Inch Cape Offshore Ltd, N-Sea will continue seabed preparation activities within the wind farm site boundary and its export cable corridor. Initially boulder clearance will focus on the wind farm site with clearance in the export cable 2 route commencing in the new year on a date to be confirmed. 

Seabed preparation includes the relocation of any boulders which may affect the installation of offshore structures, inter-array cables and export cables.

The boulder relocation vessel, FS Aries will be joined by N-Sea Pathfinder on or around Wednesday the 27th of November.

The ERRV ‘ESVAGT CARPATHIA’ provides relief duties for standby emergency rescue services during thecommissioning phase of the East Anglia THREE Offshore Converter station (OFCS) ‘EA3 OFCS’. The ESVAGT CARPATHIA will be required to cover these duties when the primary Emergency Response Rescue Vessel 'ESVAGT CARTPATHIA' conducts port calls for crew changes and resupplies.

It is currently anticipated that weather permitting, operations will be carried out on an on-demand basis (i.e.weekly, bi-weekly, ad hoc).Arrival and departure plan of the 'ESVAGT CARTPATHIA' will be notified via the East Anglia THREE Weekly Noticeof Operations.Completion of the 'ESVAGT CARTPATHIA’s' work scope will be notified by closure of this Notice to Mariners.All vessels will continuously monitor VHF Channel 16 and VHF DSC Channel 70 throughout operations.It is currently anticipated that weather permitting, works will be carried out on a continuous 24-hour basis,seven days a week, unless notified otherwise.

14 off Marine riser sections remain on the seabed at the location identified on the attached layout drawing. Their positioning has been secured utilising a combination of methods involving the following deployed equipment:

• 24 off gabion bags (2 te each),
• 24 off (6m x 3m mattresses),
• 14 off horizontal nets and 
• 1 off clump weight.

Plans are underway to retrieve all items during a single campaign scheduled for 2026 following which this notice will be retracted/updated to confirm full removal.

The Marine Riser was cut up, relocated and subsequently stabilised via a Marine Licence (ML/1100) issued by OPRED.

SSEN Transmission and National Grid Electricity Transmission (NGET) are working together to address the need for increased capacity within the transmission network between Scotland and England. EGL5 will help provide increased capacity, carrying up to 2 GW of electricity, enough for two million homes. This will be achieved through a High Voltage Direct Current (HVDC) cable connection between Aberdeenshire and Lincolnshire.

The EGL 5 geotechnical survey works are being carried out by Ocean Infinity Limited.

The area of work, pertaining to this Notice to Mariners (NtM) for EGL 5, is highlighted in Figure 1, with the survey vessels contact details for the project found in Table 1. Contact details for the project Fisheries Liaison Officers are detailed below.

Please note, this survey will be able to operate around static fishing gear. Therefore, fishing gear clearance is not being requested.

Navigational Safety Advice

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

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

Survey Vessels

The geotechnical survey works are being carried out by Ocean Infinity Limited using the following vessels:

Survey vessel: A7803 (IMO 9924261; MMSI 563175900; Call Sign 9V8529)

The MMO has issued new 15 year marine licences to Tarmac Marine and Cemex UK Marine to dredge aggregates and acquire seabed samples from current aggregate dredging licence area 430. 

The new licence boundary is reduced in extent compared to the previous licence area.

Dredging operations will continue uninterupted under the new licences from 00:00 16/11/2025.

No changes to the current work programme are planned, with dredging continuing in the current active dredge zone, in Area 430 East.

See detailed map on our bulletin website

The Affleck pipeline was installed, ploughed and backfilled earlier this year, during the backfilling operation a build of clay was experienced which resulted in a blockage of the backfill plough. This left a 2m heigh mound of clay on the seabed directly over the pipeline which could pose a hazard to fishing operations in this vicinity.

The backfill plough also experienced difficulties in another area which resulted in an area with blocks of clay circa 700mm high which could pose a hazard to fishing operations in this vicinity.

Crew Transfer Vessel NR Predator will provide assistance during the construction phase of the East Anglia THREE Offshore Windfarm Array and will make regular transits between East Anglia THREE CDM and the ports of Lowestoft and Great Yarmouth. 

Outer Thames Estuary Special Protection Area (SPA): 

As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA) during construction of East Anglia THREE, these areas shall as far as practicable be avoided during transits from 01st November to 31st March. 

The ERRV ‘ESVAGT COBRA’ provides standby emergency rescue services during the commissioning phase of the East Anglia THREE Offshore Converter station (OFCS) ‘EA3 OFCS’.  

 ‘ESVAGT COBRA’ will carry out regular transits between East Anglia THREE Windfarm and the port of Lowestoft and is equipped with VHF multi-channel radios and mobile phones.

The platform supply vessel ‘BOS PRELUDE’ provides supply service during the commissioning phase of the East Anglia THREE Offshore Converter station (OFCS) ‘EA3 OFCS’.

‘BOS PRELUDE’ will deliver supplies to the ‘EA3 OFCS’ and the jack-up vessel ‘JB 120’ (as long as installed next to the OFCS) as well as carry out regular voyages between East Anglia THREE Windfarm and the ports of Emden (Germany, main service port) and Lowestoft (UK) and is equipped with VHF multi-channel radios and mobile phones.

Outer Thames Estuary Special Protection Area (SPA):

As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA) during construction of East Anglia THREE, these areas shall as far as practicable be avoided during transits from 01st November to 31st March.

See detailed map on our bulletin website

Reported faults on AIS system, Fog Sounding Warning and Aviation lights.

Please review attached notice for further information on each item.

HS1 - Failed aviation lighting

HS1 & HS3 - No AIS Signal

HS2 & HS4 - Failed fog sounder

Some primary aims of the SubSea Soundscape project are;

To support a new Marine mammal evidence base for the Celtic Sea.

To create a region wide acoustic soundscape model and open-source baseline acoustic data of the Celtic Sea integrating new S3 data and other secured acoustic data sources.

To Co-develop road maps for the use of acoustic soundscape models for consenting

Navigation Advice

• Equipment is fully subsurface and presents no hazard to surface navigation.
• Trawling, dredging, or seabed gear deployment in the vicinity of marked positions could be avoided to reduce risk of entanglement or equipment damage.

Service of the 17 Passive Acoustic Monitoring (PAM) stations that have been deployed on the sea bed, in and at locations around the East Anglia THREE Offshore Windfarm Area.

There is an exclusion zone of 250m around each PAM station, all marine traffic is advised to abide by the 250m safety zone and navigate with caution at all times.

For further information regarding PAM station servicing, please see attached East Anglia Three Notice To Mariners 064 - 2025.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

Muir Mhòr Offshore Wind Farm Limited will deploy 2 x Measurement Systems to collect data located within a 1.5km x 2.5km area. Once deployed this Notice will be updated with as laid co-ordinates. The campaign is expected to last up to 2yrs.

The works will consist of the deployment of two seperate systems with buoys connected to a mooring line & chain anchored to the seabed with backup recovery line. Please ensure fishing gear is at a safe distance to avoid entanglement. Works will commence in October/November 2025 and the installation vessel will mobilise from Peterhead Port. 

Note: this notice is a replacemnt for Notice ID5254 which was originally submitted 18th August 2025.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

Crew Transfer Vessel NR Hunter will provide assistance during the construction phase of the East Anglia THREE Offshore Windfarm Array and will make regular transits between East Anglia THREE CDM and the ports of Lowestoft and Great Yarmouth. Outer Thames Estuary Special Protection Area (SPA): As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA) during construction of East Anglia THREE, these areas shall as far as practicable be avoided during transits from 01st November to 31st March.

It is currently anticipated that weather permitting, operations will be carried out on a continuous basis (i.e. 24-hour working, seven days a week) ‘NR Hunter’ will remain on the project until construction is complete

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 5 m vertically from the seabed. The two sites ~2 km east of the Port of Ardersier and the site near Chanonry Point and North Sutor are all surface-marked with a NB 40/NB 50 red surface float.

The recording equipment and moorings deployed at three locations between Ardersier and Findhorn will remain throughout the summer (for 12 weeks) and should be retrieved in October 2025. The recording equipment and moorings deployed at six locations around the Port of Ardersier will be serviced in the autumn and retrieved in February 2026. The recording equipment and moorings near Chanonry Point and North Sutor will be serviced in the autumn and in April 2026. 

The Spiorad na Mara Floating LiDAR (FLiDAR) was successfully serviced and returned to its original position.  

Positions of the FLiDAR is illustrated in Figure 1 and coordinates listed in Table 1 of the attached notice. 

The remaining FLiDAR is scheduled for removal in March 2026, inclusive of any delays due to adverse weather conditions. An accurate removal date, along with vessel details for the operation, will be provided in due course. 

An 8 inch oil production flowline will be installed (trenched and buired) from the exisiting GEEBB manifold (at Triton FPSO) to the new Belinda Valve skid located approx 5km south east of Triton. A 3 inch gas pipelines (piggy backed with the 8 inch) will also be was installed the same trence. 

A servise umbilical will be installed from the existing Evelyn valve skid to the Belinda valve skid located 7km north east of Evelyn. 

The works shall comprise the installtion of the following subsea pipeline or cable, or system of subsewa pipelines and cables:

- Bittern WI pipeline replacment and tie in spool

Dana intend to reinstate water injection at the Bittern field through installation of a new 12” water injection pipeline between the Triton FPSO and Bittern WA and WB XTs. The pipeline will be deployed by way of a pipelay vessel and laid on the seabed. The pipeline will subsequently be trenched and buried using a jet trencher. The pipeline will be accompanied by a number of jumpers and spools to tie-in to the water injection system. Rock placement, grout bags and mattresses may be required over the length of the pipeline.

As part of the system, they intend to install a 33.3 m tie-in spool connecting the new water injection pipeline (PL6609) to the WB XT. A combination of grout bags and concrete mattresses will be used to protect the pipeline.

The Works shall be located at: 57 04' 58.69" N, 00 53' 20.47" E Block 21/30.

The structure will be loaded onto the installation vessel in Peterhead and seafastened before undertaking the short transit to the field. Upon arrival, the seabed will be prepared by the temporary installation of transponder beacons to allow accurate positioning. The ship's crane will pick up the structure and overboard it clear of any subsea assets. The vessel will then step into the desired location and lower the structure to the seabed. The ship's ROV will disconnect installation rigging and recover all transponders and a structure based gyro.

As the structure is required to be located within the FPSO swing circle, heading control will be arranged for the FPSO to maintain a safe clearance between the FPSO and construction vessel. Once installed no further navigation aids are required.

Clump weight is 2500kg, approximately 0.75m^3 and lies <1m on the seabed.

Operation of 6 Kelpedo seaweed units within a 600m x 100m licensed array area commencing from the 25th February 2025.  

Kelpedo units will remain in position until March 2026. Monthly maintenance and inspection of the array will be undertaken by the R.V. Fortuna. During operations R.V Fortuna will be restricted in its ability to manoeuvre and will display appropriate day shapes and light in accordance with COLREGs, alongside transmitting its position on AIS.

The site will consist of 6 modular scientific KelpedoTM units, with each comprising of anchor weight, rising chain and riser rope, custom version of a KelpedoTM and a HDPE special marker buoy. Units will be sequentially number 1 – 6 from North to South.

The special marker buoys are bright yellow HDPE pillars, 1.5m in height, with an integrated reflector, St Andrews Cross and a 360° yellow warning light. Lighting Sequence FL(5) Y 20s. 

Dear Sir, Madam 

We would like to inform you of an important development in our marine management. A research project for oyster bank recovery will soon be implemented at certain locations within the Belgian part of the North Sea. This will take place from June 2025 at the following locations with coordinates around which a radius of 200m will be drawn:  - Location 1: 51.39573 - 2.497253 .This is where the Kilmore wreck, protected by law, is located. This area was selected because a safety zone is already present here.  - Location 2: 51.39235 - 2.504558.

These are also shown on the map below. Therefore, as one of the frequent users of this zone, we would like to give you additional information. The locations (a circle with radius 200m) should be avoided for bottom disturbance. This will be communicated through a BaZ. 

Specifically, these recovery measures consist of placing structures sown with oysters on the seabed. The oysters were raised in the Netherlands. A Belgian fishing vessel will be involved in the installation at sea, to explore how this cooperation can be strengthened in the future. To give the oysters a chance to grow, they must remain undisturbed at all times. On top of that, the structures can cause major damage to the nets or the catch. Therefore, it is very important that you do not disturb these areas with bottom disturbing fishing techniques or anchors, etc.   

We also want to let you know that enforcement will take place to ensure that prohibited activities are not within the designated areas. 

We understand that this may cause inconvenience, but count on your cooperation to ensure that the oyster bank recovery activities are successful and thus support the environment. If you have any questions or would like more information, please feel free to contact us by phone or email. 

Thank you for your understanding and cooperation. Kind regards,

Wim Deschutter, Technical expert marine pollution control | DG Environment | Marine Environment wim.deschutter@health.fgov.be Tel: +32 (0)2 524 9016 - GSM: +32 (0)475 666 772

and

Merel Oeyen, Policy officer Marine Environment| DG Environment merel.oeyen@health.fgov.be Tel: +32 (0)2 524 69 67 - GSM: +32 (0)478 67 65 05

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

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

Seabed preparatory works took place in spring and summer 2024. The installation of the caissons started in April 2025 and will proceed untill autumn 2026. During the winter months, no installation works will take place. The exclusion area remains in force at all times.  

More information about the Princess Elisabeth Island is available on the Elia website: https://www.elia.be/en/infrastructure-and-projects/infrastructure-projects/princess-elisabeth-island. 

A total of 32 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.

Crew Transfer Vessel NR Rebellion will provide assistance during the construction phase of the East Anglia Three Offshore Windfarm Array and will make regular transits between East Anglia Three CDM and the ports of Lowestoft and Great Yarmouth. Outer Thames Estuary Special Protection Area (SPA) As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA), during construction of EA3. It is anticipated that vessels which are transiting to Lowestoft and Great Yarmouth ports, such as for crew transfer operations, will transit through and/or in proximity to the Outer Thames Estuary SPA. These areas shall be as far as practicable be avoided during transit from 01st November to 31st March

Seaway Ventus will install 95 monopiles and transition pieces at the WTG locations set out in attached East Anglia Three Notice To Mariners 012 /2025. During the monopile and transition piece installation campaign, all vessels are requested to keep a 500m safety distance from the Seaway Ventus. It is currently anticipated that weather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week)

During operations, the ‘Seaway Ventus’ will have restricted manoeuvrability as defined under COLREGS (International Regulations for Preventing Collisions At Sea, 1972). They will display the appropriate day shapes and lights and will transmit an Automatic Identification System (AIS) message.

The guard vessel ‘Tess’ will monitor vessel traffic in and around the East Anglia Three Offshore Windfarm 24hours a day, 7 days a week. The vessel will broadcast regular navigational warnings and will contact any non-project vessels they believe could cause potential hazards, risk of collision, or cause an interruption to project vessels or assets. She will be monitoring VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operaton.

East Anglia THREE will be a large offshore wind farm, located 69 km off the Norfolk coast. With a projected capacity of approximately 1400MW, the wind farm shall supply electricity to approximately one million UK homes. Onshore construction for the project started in July 2022. 

By use of multiple specialized offshore vessels,1 Offshore Convertor station (OFCS) & 95 offshore wind turbine generators (WTGs) will be installed within the East Anglia Three site boundary along with the associated inter array and export cables. The generated power will be transmitted via an installed External Cable (EC) from the OFCS to a shore side substation located in Bramford. 

See detailed map on our bulletin website