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Weather Buoy maintenance to be conducted by the ‘Green Isle’.  

It is currently anticipated that weather permitting, works will commence circa the 13/04/2026 The weather buoys will remain on station throughout the construction phase of the East Anglia THREE Offshore Windfarm. 

Completion of maintenance works will be notified by future Notice to mariners. 

Mariners are advised about geophysical investigations in the Thistle Wind Partners Bowdun E3 Export Cable landfall area, chart provided in Figure 1 in the NtM, and coordinates in Table 1 below. Njord is conducting these investigations on behalf of Thistle Wind Partners. The survey vessel, Northern Breeze, will be performing these operations. Vessel details and contact information are provided below. The work is expected to commence on 24 April 2026. The work is expected to be completed by approximately 06 May 2026, subject to weather.

The Seapiper will work at locations where post cable lay burial operations require an additional level of depth protection. 

The vessel will transit directly from the loading quarry in Norway to site and will not use any UK port.

Mariners are requested to remain where possible 500m from vessels and equipment. Fishing vessels are requested to pass at a safe speed and distance.  

During these rock placement works the “Seapiper” will be restricted in its ability to manoeuvre as it carries out the rock placement work and shall also be always exhibiting the correct day shapes/lights. 

The vessel can be contacted on VHF 16 for further information as required reference proximity/nearby operations etc. 

Please note that rock placement will cause a reduction of navigable depth, but this is unlikely to exceed a 10% reduction. The actual positions of rock placement will be updated as part of the as-built information of the project. 

Note

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.

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

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” and "Rem Energy 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) and MHO Gurli 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.

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) "Rem Energy", “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 Gurli 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.

The OBN survey at Martin Linge will be carried out by the vessels REM Trader, Sanco Star, Esvagt Castor and Stålbas.

REM Trader will lay nodes on the seabed around the Martin Linge platform and Martin Linge FSO. The nodes are organised in a series of 27 lines in the NE-SW direction. On each line, there will be a node every 25m. Nodes lines are 400m apart.

When deploying the nodes, REM Trader will be very restricted in her manoeuvrability. She will have nodes, ropes and weights being deployed from her stern at a speed of 0.5-2 knots.

After nodes have been deployed Sanco Star will then deploy 2 seismic sources and fire shot points every 25m over the whole area at an average speed of 4.5 knots. Shot points are also fired along straight lines in the NE-SW direction. The source lines will be 100m apart. The towed equipment behind Sanco Star when acting as source vessel will measure approximately 200m x 100m (LxW).

Esvagt Castor and Stålbas will act as support and escort vessels for REM Trader and Sanco Star during the survey.

REM Trader: Call Sign 5BGQ5 - IMO 9529932 – captain@trader.remoffshore.no - +47 23 67 27 72

Sanco Star: Call Sign ZDIT8 – IMO 9410313 – captain.star@sanco.no - +47 23 67 85 50

Esvagt Castor: Call Sign OUKI2 – IMO 9508756 – castor@esvagtvessel.com - +45 61 62 67 74

Stålbas: Call Sign 5077682 – IMO LNXH – stalbas.bridge@besi.no - +47 90 68 88 37

In preparation for the installation of a floating Wind Turbine at Culzean - an acoustic device will be deployed near to the proposed wind turbine location at the Culzean field.  The acoustic device will be at the location noted below - but will extend to a total height of 25m above the seabed. The device will deployed from 19th April 2026 (depending on weather) and will be in place for approx. six months.  

The survey will involve the full coverage of dedicated survey lines with a geophysical survey system multibeam echo sounder and towed Sidescan Sonar.

As the Fugro Frontier will be line keeping, the vessel may require large turning circles and will be restricted in their ability to manoeuvre.

All vessels operating within this area are requested to keep their distance, maintaining at least the 500m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

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

Re-surveyed March 26

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking a subsea inspection located in the Clyde Marine area.

Please refer to Figure 1 in the NtM - that highlights the cable location.

Given the different conditions and water depths anticipated at the site, a range of vessels will be available for the project, detailed in the NtM.

Please be advised that SHEPD will be undertaking remedial works within the intertidal area at Westhaven, Cumbrae  

Proposed works involve the removal of out of service cable an out of service subsea power cable in the between Mean High Water Springs and slightly below Mean Low Water Springs. 

Works have been postponed and due to commence between the 13th of April and complete by 23rd of April with a duration of 3-5 days.

The Unexploded Ordinance (UXO) Investigation will be carried out in the Eastern Irish Sea to identify potential UXO targets (pUXO) along the Liverpool Bay CCS Cable Construction Area 

The UXO corridor has been divided into ten separate Blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders.

Blocks A – J coordinates can be found in Table 1 of the attached notice  

The Titan Discovery will work within Blocks A- D nearshore, the Argyll Explorer will work initially in Blocks A-D and then Blocks I-J, the Ocean Geograph will work Blocks D-J offshore.    

The positions of any targets identified as confirmed Unexploded Ordinance (cUXO) will be shared within a separate notice and posted as a hazard on the Kingfisher Bulletin Service.   

The vessels are estimated to be on location for ~14 days (weather dependant) completing works by ~28th April, working 24 hours a day. 

Mariners are advised to always maintain a safe distance (of at least 500m) from the Argyll Explorer, Titan Discovery & Ocean Geograph.   

For further information, contact details for the Company Fisheries Liaison Officers are provided in Section 7 of the attached notice. 

Please be advised that SHEPD will be conducting remedial works within the intertidal area at Kerrylamont Bay, Bute.  

Proposed works involve the replacement of split-pipe protection and reburial where necessary of an existing subsea power cable in the intertidal area between Mean High Water Springs and Mean Low Water Springs.

Works have been postponed and due to commence between the 13th of April and complete by 23rd of April with a duration of 3-5 days. 

Please refer to Figures 1 and 2, which show the location and proposed works area.  

Please also refer to Table 1 overleaf, which lists the coordinates of the working area.

Mariners are advised that a marine geophysical survey will be conducted in offshore areas and coastal sea waters between Shipwash East offshore area the Outer Pegwell Bay, Ramsgate, Kent in the corridor as shown in Figure 1 of the NtM.  

The survey is being undertaken on behalf of National Grid’s Sea Link Project. 

The survey campaign is planned to on the approximately 17th April and extend throughout June, depending on weather conditions, but may be subject to change. 

Irish Sea Pioneer is moving from lennox Platform to Camell lairds (Birkenhead). Rigs are protected by a 500m safety zone.

EGL2 are due to commence an unexploded ordnance (UXO) target investigation ROV survey on the 9th of March 2026.

The works are to be conducted within the Exclusion Block (Block 3) shown by Figure 1, the coordinates for this area are provided in Table 1.

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 30th of April 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.

SVT deployment will be carried out as part of a survey sensor check, involving temproary deployment of survey gear to the seabed.

Reach Subsea UK LTD are conducting a survey campaign on behalf of Scottish Hydro Electric Transmission Plc. Trading as Scottish and Southern Electricity Networks Transmission (SSENT). SSEN Transmission plan to commence the marine survey inside 12nm on 28th March 2026.  The survey equipment will consist of Multi Beam Echo Sounder (MBES), Side Scan Sonar (SSS), Sub-Bottom Profiler (SBP), Magnetometer, Benthic grabs, Vibrocores and Core Penetration Tests across 2 different vessels that will likely be no further inshore than 15m LAT. The survey equipment will also require calibration testing, which may be conducted outwith the survey corridor.

Survey vessel Skandi Iceman will survey at the FPSO moored position all wet stored anchors and mooring chains prior to the FPSO arrival and subsequent hook up. These anchors are within the Rosebank development area.

All vessels are requested to give the "Skandi Iceman" a wide berth as vessel will be operating within a radius of 2.0 nm of this given position. 

Construction Support Activities  

The Service Operations VesselS (SOV) Grampian Tweed and Grampian Tyne will carry out construction support activities at the Offshore Substation Platform in the DBC construction site and at various WTG locations.

Seabed Rock Installation

The Fall Pipe Vessel Rollingstone will continue with subsea rock installation at various locations on Dogger Bank C construction area. 

During operations, the vessels 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.

Please be advised that between the 16th of April 2026 and 23rd April 2026, there will be a vessel (Deep - Vision) present within a 500-metre radius of the Ninian Southern Platform at the following location to carry out the following activity:-

Assist with the removal of a 12.2 metre section of well conductor from the confides of the Ninian Southern Jacket (at the -43m level) and subsequent controlled laydown onto the seabed of said section, within the boundaries of the jacket structure.

A service has been completed on the Passive Acoustic Monitoring (PAM) Stations that have been deployed on the seabed, in and at locations around the East Anglia THREE Offshore Windfarm Area.  A total of eleven PAM stations have been re-deployed, two of which are marked by surface buoys. 

The PAM stations will remain on the seabed until approximately 31/10/2027, 9 deployed PAM stations have a 12 m height above the seabed, a weight of 600 kg and their location is not marked by a surface buoy. Two deployed PAM stations are marked by surface buoys, each anchored to the seabed by two 2 tonne anchor mooring weights.

The PAM stations will be serviced periodically with information distributed via future Notice to Mariners. There is an exclusion zone of 250m around each PAM Station, Marine traffic is advised to maintain the safety zone and navigate with caution at all times. 

Construction Support Activities

The Offshore Construction Support Vessels IWS Skywalker, Grampian Tyne and Boreas Enabler will continue with ongoing construction support activities within Dogger Bank B construction site.

Wind Turbine Generator (WTG) Installation

he Jack-up WTG Installation Vessel, Voltaire, will continue installation of wind  turbine generators (WTG) within the Dogger Bank B construction area. The works commencing in February 2026, and will be continuous, 24 hours a day, for the duration of the WTG installations.

Boulder Relocation Campaign The Offshore Service Vessel, Trym, will perform boulder relocation operations within Dogger Bank B offshore construction area.

During operations,all vessels 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.

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

Construction Support Activities

The Offshore Construction Support Vessels Boreas Enabler, Grampian Derwent, IWS Sunwalker and Norwind Helm will continue with ongoing construction support activities within Dogger Bank A construction site. 

GEOxyz will utilise the ‘Geo Ocean IV' to perform a Pre-Installation Survey within the East Anglia Three Offshore Windfarm. 

The vessel will conduct Multibeam Echo Sounder (MBES) and Side Scan Sonar (SSS) surveys of the WTG foundation locations, at a radius of 170m. 

The Multibeam Echo Sounder is hull mounted and the Side Scan Sonar is towed from the stern of the vessel at a height of 6.5m to 10m above the seabed. 

Geo Ocean IV is expected to mobilize from the port of ‘Lowestoft or Great Yarmouth’ circa the 21/04/2026. It is anticipated that the campaign will last approximately 15 days, the end of the campaign will be communicated by closure of this notice to mariners. 

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

GEOxyz will utilise the ‘Geo Ocean III' to perform boulder and debris removal within the East Anglia THREE Offshore Windfarm. 

The vessel will conduct investigation by ROV followed by relocation of boulders and debris with grab in the WTG locations and IAC strings. 

Geo Ocean III is expected to mobilize from the port of ‘Ostende’ circa the 20/04/2026. It is anticipated that the campaign will last approximately 16 days, the end of the campaign will be communicated by closure of this notice to mariners. 

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

Biological sampling will be preceded by geophysical investigations to select appropriate ground conditions for sampling. 

An NFFO Offshore Fisheries Liaison Officer (OFLO) will be onboard the Ocean Observer. Survey activities will be planned and work around static fishing gear to avoid disruption.    

The vessel is estimated to arrive on location ~21st April working 24 hours a day for ~ 58 days. 

Mariners are advised to politely maintain a safe distance (of at least 500m) from the Ocean Observer.

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 6 of the attached notice. 

Mariners are advised about geotechnical investigations in the Thistle Wind Partners Bowdun E3 Windfarm Array area, chart provided in Figure 1, and coordinates in Table 1 below. Geoquip Marine is conducting these investigations on behalf of Thistle Wind Partners. Two survey vessels, Geoquip Seehorn and Geo – Connector will be performing these operations. Vessel details and contact information are provided below. The work is expected to commence on 19 April 2026.

Type See detailed map on our bulletin website

Survey will comprise:SSS/MBES of well areas,drop camera/video,grab sampling for chemical and faunal analyses

Ithaca is planning to conduct a bathymetry, debris clearance, habitat assessment and environment baseline survey in the Captain Field (over Areas B & C). The scope of the survey work will involve collection of SSS, SBES, MBES and  passive magnetometer data. Video and stills photography will be undertaken at a number of environmental stations followed by grab samples.

Wellhead protection structure at Seven Seas now removed and recovered to surface. Well subsea infrastructure still in place. Well-Safe Protector mobilising 15th April 2026 from Aberdeen to complete full well P&A. This date is subject to change depending on weather and operational requirements.  500 m safety zone remains in place.

Grove G5 Xmas tree and Wellhead protection structure remain in place with Wellhead Protection Structure Top Canopy removed. 500 m safety zone remains in place. Well-Safe Protector is expected to be on location around mid May 2026 to complete full well P&A.  This date is subject to change depending on weather and operational requirements.

The 2026 Attic Oil Recovery (AOR) campaign at Brent Charlie will encompass an upfront access and survey campaign followed (as required / possible) by recovery of mobile attic oil and interphase material.

Vessel to be on location for approx five (5) days.

No streamers to be towed for this survey.

Vessel to be on location for approx eight (8) days.

No streamers to be towed for this survey.

Vessel to be on location for approx five (5) days.

No streamers to be towed for this survey.

EGL2 are due to commence an unexploded ordnance (UXO) target investigation ROV survey on

1 April 2026.

This work consists of a single UXO target investigation to be conducted within the safety perimeter shown in Figure 1, the coordinates for this area are provided in Table 1.

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 may also be a small amount of debris recovery required depending on what is found during the investigation.

The work is estimated to finish on approximately the 20 April 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.

Mariners are requested to maintain a safety perimeter of 500 m from the vessel Trym.

Cable laying operations will continue to be conducted within the East Anglia THREE Offshore Windfarm by CLV Seaway Phoenix. The vessels will install subsea cables between WTGs and the Offshore Converter Station (OFCS). The Grand Canyon 3 will conduct trenching and burial operations supporting the Cable-Laying operation. During cable deployment, trenching & burial, both the vessels will be restricted in their ability to manoeuvre.The Seaway Phoenix will carry out cable laying activities, and be supported by the Seaway Moxie & Windea Clausius, which will both 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 & Windea Clausius will also be restricted in manoeuvrability.

For further information regarding Inter Array Cable Installation Operations, please see attached East Anglia THREE Notice To Mariners 006-2026 Inter- Array Cable Installation.

NKT will conduct Seabed Rock Installation (SRI) at the East Anglia 3 Offshore Converter Station (OFCS) in the North Sea 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 cables at the interface to the OFCS. 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.

Rollingstone is expected to mobilize circa 29/03/2026. Rollingstone 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. During operations, the Rollingstone will have restricted maneuverability 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. All vessels are required to monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operation.

GEOxyz will utilise the ‘Geo Ocean V' to perform boulder and debris target inspections within the East Anglia Three Offshore Windfarm.

The vessel will conduct investigation by ROV at the WTG locations.

Geo Ocean V is expected to mobilize from the port of ‘Lowestoft’ circa the 27/03/2026. It is anticipated that the works will last approximately 2 days, the end of the works will be communicated by closure of this notice to mariners.

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

Type See detailed map on our bulletin website

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be undertaking a ROV survey of the recently installed cable between Mull and Iona.

Please refer to Figure 1 that shows the location of the planned works. Please also refer to Table 2 overleaf that lists the coordinates for the area. 

The ROV survey will take place with the CBS Hurricane and will be regularly passing inside the working corridor. 

Please refer to Table 1 that lists scope of work, estimated date range and the relevant vessels that will be utilised.  As work progresses, further updates will be provided.

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be conducting ROV surveys and installing additional subsea cable protection between Coll and Tiree.

Please refer to Figure 1 that shows the location of the planned works.

Please also refer to Table 2 overleaf that lists the coordinates for the area. 

The cable protection installation will take place with the CBS Hurricane and will consist of a ROV survey and Diving operations. 

Please refer to Table 1 that lists scope of work, estimated date range and the relevant vessels that will be utilised.  As work progresses, further updates will be provided. 

Statfjord intrafield survey using ROV from the vessel Edda Flora in water depths of approximately 70-150m. No towed equipment in use.

Vessel: Edda Flora

IMO/MMSI: 9386380/258245000

Call Sign: LAJW3

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.

The Fugro Frontier will be performing a UXO site investigation for the purpose of UXO ALARP ahead of a planned geotechnical site investigation in May 2026. The Fugro Frontier will be conducting operations within 50x50m boxes using the following sensors:

§  Multibeam Echosounder (MBES)

§  Side Scan Sonar (SSS)

§  Magnetometer (MAG)

§  Survey Verification Test (SVT)

The survey will take place between 20/04/26 to 03/05/26 (part A) and 06/05/26 to 18/05/26 (part B).

In Part A we will be carrying out multibeam acquisitions running lines at 2-4 knots with limited manoeuvrability.

In part B we will be carrying out grabbing activities using a hammon grab (approx. 100 sediment stations), and towed drop camera again working with limited manoeuvrability during these operations. We will also carry out further multibeam acquisition.  

The key overarching aims of the survey are:-

•            To secure seabed data to deliver UK government commitments on navigational safety (mitigating safety risk through the UK Civil Hydrography Programme), protecting the marine environment (monitoring of Marine Protected Areas / Marine Conservation Zones), delivering clean power from offshore wind, and energy security;

•            To collect seabed mapping data for all/part of an MPA/MCZ site that requires monitoring and has not been surveyed through the CHP for over 20 years;

•            To maximise the benefits of integrating publicly funded surveys rather than each organisation carrying out surveys independently under different programmes; 

•            To contribute to CSM priorities on Data Collaboration, Data Standards, Data Accessibility and Data Collection;

•            To demonstrate the public value of integrating the various interests and sectors such as navigation safety, marine conservation, national security, critical seabed infrastructure, offshore development, heritage, and research;

•            To provide opportunities to share knowledge and expertise, gain training and offshore fieldwork experience;

•            To utilise existing arrangements and agreements between public sector agencies that enables collaboration and sharing of resources and personnel;

•            To establish new agreements where necessary to realise efficiencies and maximise cost-effectiveness.

Mariners are advised that Global Marine Systems Limited (GMSL), on behalf of SHEFA, will be undertaking the installation of the SHEFA-2 Fibre Optic Cable system in the North Sea. Operations are anticipated to take place in Q2 2026.

The vessels, CS Sovereign and Glomar Supporter, will be undertaking underwater activities in the area and mariners should exercise caution and communicate with the vessel. 

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

The operational VHF channel for project vessels is Channel 70 and all vessels will monitor Channel 16. Vessels are encouraged to seek further information from local port authorities in areas of operations.

For further details on vessel and schedule see attachment.

Vessel now on location.

Survey works to last 14 - 21 days.

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

Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of May to March 2027. Survey dates will be updated as the programme progresses.

Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of June to March 2027. Survey dates will be updated as the programme progresses.

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of May to March 2027. Survey dates will be updated as the programme progresses.

Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of May to March 2027. Survey dates will be updated as the programme progresses.

All mariners are advised that MPI Adventure will be carrying out maintenance operations at Rhyl flats Offshore Wind Farm from 10/04/2026 until 18/04/2026. These dates are subject to weather and sea conditions. Specific coordinates of locations where works occur are found below.

Works Locations

Mariners must observe the safety zone of 500m when the MPI Adventure is attached or anchored next to RF14, RF18, RF07 & RF19. It is also requested that mariners observe a distance of at least 500m when MPI Adventure is manoeuvring into position for the safety of all sea users operating 

All mariners and their equipment are requested to remain at least 500m from all infrastructure at all times. CTVs will be regularly on site and mariners should keep a safe working distance of 500 m from these vessels where possible

Hullmounted MBES survey to update nautcial charts from October to januari 2026, with Northern Gale and Northern Breeze

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

IGJ02 51 55.943'N 001 59.565'E

IGJ03 51 55.422’N 001 59.246’E

IGH07 51 55.025’N 001 57.472’E

IGC02 51 57.144’N 001 53.915’E

IGG09 51 53.226’N 001 55.606’E

IGI10 51 52.338’N 001 56.477’E

Venterra have deployed three Floating LiDAR Buoys in the area around the NOAH Met Mast. Deployment operations took take place on or around 6th April 2026. The three buoys will remain on station for a minimum of 1 month, recovery expected in May 2026, weather permitting.

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

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 April 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.

Type See detailed map on our bulletin website

All mariners and stakeholders are advised that monopile B02 is unlit until further notice.

Whilst unlit the monopile shall be monitored by the guard vessel Ocean Rose

B02 location and coordinates shown in the attached notice to mariners.

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 operations were undertaken in March 2026; object not located. Further update to follow.

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

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

Jack up Location     IGF10   Gearbox    51° 51.618' N    1° 53.892'E

NR Cheetah Jack up CTV Support

Type See detailed map on our bulletin website

The proposed scope of work includes downhole flushing (no discharges to sea) of XT pipework and jumpers, disconnection of XTs, and performing barrier testing on isolation valves at each XT. 

In addition, PL870B (Water Injection Pipeline to Strathspey) will be disconnected at the SMS.

This is in preparation to support the final decommissioning at a later date.  

Location – 60 55 37.04 North, 01 42 18.26 East

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning as part of the annual operations and maintenance of assets, general visual inspection of the asset foundations (Table 1 and Figure 1). Asset foundation inspections will be carried out by the Voe Vanguard which is expected to be on site from 20th April to 25 July 2026. Works will be completed at all 100 WTG within the red boundary in Figure 1.

Please be aware that, during the survey activities, by virtue of its mode of operation the vessel (Voe Vanguard) 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 Survey Vessel, their crew, and their ability to undertake its contracted works, fishermen who have static fishing gears deployed within 500 m from the WTG where survey activities are planned (see Table 1 and Figure 1) are requested to provide the coordinates of such deployed gears in DMS and details of whether the surface markers used are visible at all states of visibility to Alex Winrow-Griffin (Brown & May Marine) using the contact information below (Section 58 of the Merchant Shipping Act 1995).Fishermen who have static gears deployed beyond 12 nm are reminded that static gear must be marked in accordance with Commission Implementing Regulation (EU) No. 404/2011 (https://www.gov.uk/guidance/marking-of-fishing-gear-retrieval-and-notification-of-lost-gear#marking-of-fishing-gear)

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake geophysical surveys within the site boundary (Table 1 and Figure 1). Survey operations will be carried out by the Geosurveyor XI which is expected to be on site from 15th April to 25th May 2026. The survey will take place within the red boundary in Figure 1.The geophysical survey scope will include Multibeam Echosounder (MBES), Side Scan Sonar (SSS) of a maximum of 50 m width at 22 inter-array cables and 2 interconnector cables, and a 300m2 area around 30 WTGs and 3 OSP locations. The coordinates of the work site boundary are presented in the below Table 1 and shown in Figure 1.

1. General Safety AdvicePlease be aware that, during the survey activities, by virtue of its mode of operation the vessel (Geosurveyor XI) 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 Survey Vessel, their crew, and their ability to undertake its contracted works, fishermen who have static fishing gears deployed within 500 m from the WTG where survey activities are planned (see Table 1 and Figure 1) are requested to provide the coordinates of such deployed gears in DMS and details of whether the surface markers used are visible at all states of visibility to Alex Winrow-Griffin (Brown & May Marine) using the contact information below (Section 58 of the Merchant Shipping Act 1995).Fishermen who have static gears deployed beyond 12 nm are reminded that static gear must be marked in accordance with Commission Implementing Regulation (EU) No. 404/2011 (https://www.gov.uk/guidance/marking-of-fishing-gear-retrieval-and-notification-of-lost-gear#marking-of-fishing-gear) 

Survey operations will be carried out by the Geosurveyor XI which is expected to arrive at the Moray West site 16th April. Geophysical surveys are programmed to be carried out along the Moray West Offshore Export Cable (OEC) on 17th-18th April. The vessel will then proceed to Moray East to survey the windfarm assets, before returning to the Moray West site to complete the geophysical surveys across the rest of the site (around turbines and inter array cables).

The geophysical surveys within the OEC are anticipated to take one day and will be carried out during daylight hours only. Survey operations within the OEC will be able to work around any fishing gear sighted from the vessel. It is anticipated that the vessel will resume work on the Moray West site on approximately 3rd May, with the survey period covering approximately 38 days (16 days of work and a contingency for weather downtime/ delays on Moray East). Works within the Moray West red boundary (Figure 1) will take place throughout a 24-hour period.

The activities will be carried out in the Eastern Irish along the Liverpool Bay CCS Cable Construction Area (See Figure 1 and Table 1 in the attached notice)  

 The construction area has been divided into ten separate Blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders (Blocks A – J coordinates can be found in Table 1 in the attached notice) 

Pre-Lay Trenching activities will take place within Blocks A, and D-G only.

The works include use of a Remotely Operated Vehicle (ROV) and a Subsea Cable Trencher which will be deployed at the rear of the vessel. The vessel will have restricted manoeuvrability and speed while the equipment is deployed.  

 Mariners are advised to always maintain a safe distance (of at least 600m) from the Ndeavor at all times. 

 The vessel is estimated to arrive on location ~ 17th April working 24 hours a day for ~ 21 days. 

 For further information, contact details for the Company Fisheries Liaison Officers are provided in Section 7. 

The activities will be carried out in the Eastern Irish along the Liverpool Bay CCS Cable Construction Area (See Figure 1 and Table 1 in the attached notice) 

The construction area has been divided into ten separate Blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders.

Boulder relocation activities will take place within Blocks A –J with boulders being replaced ~ +6.5m from their original position.  

Mattress lay will take place within Blocks C – F. The as-laid positions of mattresses will be shared on the Kingfisher Bulletin Service once finalised.      

The vessel is estimated to arrive on location ~ 10th April working 24 hours a day for ~ 16 days. 

Mariners are advised to always maintain a safe distance (of at least 500m) from the Zwerver V at all times. 

For further information, contact details for the Company Fisheries Liaison Officers are provided.

XOCEAN is planning the collection of geophysical data using remotely piloted Uncrewed Surface Vessels (USVs) along a proposed cable route corridor in Orkney, from the islands of Sanday to North Ronaldsay. 

The 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. 

Dates/Duration: Operations are expected to commence around 15 April 2026.

It is expected that the survey activities shall be completed within 30 days (subject to weather). 

Survey Area: Figure 1 below indicates the operational area which is shown by the darker green area. This is outlined in Table 1 below also.  

Fishing Gear Clearance: No fishing gear clearance is presently being requested for these surveys.

Operation of remotely piloted Uncrewed Surface Vessels (USVs) are planned in the southern North Sea, UK, during April and May 2026. The vessels will be engaged in survey activities on behalf of Sheringham Shoal and Dudgeon Extensions ProjCo Limited in the nearshore area of Sheringham (0-12 LAT) as outlined in Figure 1. It is expected there will be two USVs operational at any one time. Dates:  Survey operations are expected to commence from 14th April 2026 for approximately two weeks, subject to weather and other operational factors.

All mariners and stakeholders are advised that Passive Acoustic Monitoring (PAM) moorings for the purpose of underwater noise monitoring will be deployed within and in the proximity of the Inch Cape Wind Farm site.

A total of eight moorings will be deployed within the wind farm site and will remain in place for approximately 7-14 days. Following this period, the moorings will be recovered and redeployed at different locations within the site to remain in place for further 7-14 days. These locations are shown in the attached notice to mariners

A total of two moorings have been deployed outside the wind farm site and will remain in place for 14-30 days. The location and coordinates are provided in Figure 4 and Table 3.

These moorings will not be surface marked as the top of the mooring extends approximately 4-7m above the seabed.

The crew transfer vessel Manor Victor shall deploy the devices with operations expected to be completed within six days.

The works will be performed in a single campaign, commencing on the 10th of April 2026 continuing until approximately the 30th of April 2026. The works will be continuous, 24 hours a day.  

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 Trym 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 Trym and pass at reduced speed.

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore Unexploded Ordnance (UXO) investigation survey in the southern North Sea, utilising divers. The survey will be conducted by the vessel DSV Curtis Marshall (see section 6)

The scope will include targeted investigation of potential UXO targets within NEP Pipeline and Cable Construction Area Block 1 (see Figure 1 and Table 1 below) in water depths of ≤10 m. Where required, clearance activities will be undertaken. Clearance methods may include deflagration (low-order disarming), and the relocation of debris away from the pipeline route and associated exclusion zone. In addition, the vessel will undertake nearshore sediment sampling within the same work area. Relevant permissions in place are provided in Section 2.

The vessel is estimated to arrive on location on ~3rd April 2026.The investigation is expected to take ~14 days to complete (weather dependant). Mariners are advised to maintain a safe distance (of at least 500m) from the survey vessel locations at all times.

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7.

Survey carried out by the vessel “MV Ocean Reliance”

The MV Ocean Reliance will acquire a standard site survey over the given area. The vessel will during its acquisition-period tow two streamers of 1200 m length in N-S and in E-W direction.

During the survey period the vessel will also perform Cone Penetrations tests (CPT’s) for geotechnical measurements of the seabed.

During the seismic acquisition period and during the CPT measurements the vessel will have restricted manoeuvrability.

MV Ocean Reliance will be the only operating vessel, no support or guard vessel will be active:

MV Ocean Reliance:

Call Sign HP6391 - IMO 8616609

opm@reliance.gardline.com

+44 (0) 2038 682 090

The Jack-Up vessel “ZITON WIND SERVER” is expected to arrive at Sheringham Shoal wind farm on 12th April 2026. Seven WTG locations are planned for major component exchange.

Mariners are advised that Sheringham Shoal Offshore Wind Farm will be conducting a scheduled blade repair campaign between 1 April and 30 June 2026. 

During the summer the CTV “Ava Sofie” will look to complete ladder cleaning activities for Bird waste and marine growth removal on all 88 WTGs. 

PLEASE SEE ATTACHED NTM FOR FURTHER DETAILS ON ALL 3 ACTIVITIES.

The Edda Freya will install a flexible riser from the Anasuria FPSO to seabed touchdown, within the Anasuria 500m Exclusion Zone, and subsequently surface laid to the Teal West Wellhead. The flowline will cross the Guillemot Gas Lift Line which will be pre-installed with concrete mattresses prior to lay activities.

The umbilical riser will also be installed from the Anasuria FPSO to seabed touchdown, within the Anasuria 500m Exclusion Zone, and subsequently surface laid to the Teal West Wellhead. The umbilical will also cross the Guillemot Gas Lift Line and pre-installed concrete mattresses.

Both products will be tied in to the Teal West Wellhead and leak test prior to the Edda Freya leaving field.

With both products being surface laid there will be a period of approximately 2-3 weeks where the products will be unprotected before being protected by rock, during this period the products present a hazard to other users of the sea. A Hazard Notification will be provided for this in due course.

Type See detailed map on our bulletin website

Nearshore Geophysical survey, performed under a Marine Licence issued by the Marine Directorate Licencing Operations Team (MD-LOT) – MS-00011499 and a Licence issued by Crown Estates Scotland - ref. AMR/CES/EI-0067.

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

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections across the West Highland marine areas.

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

VESSEL DETAILSThe vessel conducting the works will be restricted in its ability to manoeuvre and will display the appropriate lights and shapes.Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations.The vessel will monitor VHF Channel 16 throughout survey operations.

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

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. 

Rollingstone will start operations on 10th of April 2026 and will perform rock placement during multiple loadouts, finishing her scope around 30th of April 2026. Work will be continuous, 24 hours a day.

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

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

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

The Titan Endeavour will be conducting MBES, sidescan sonar and magnetometer surveys along the intedned route. Environmental day grab and camera operations will be conducted at 1km intervals along the route.

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 April 2026. 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.

Perenco are planning to undertake modifications to the topsides and install a conductor at Hoton utilising the HAEVA Jack-Up Barge (JUB). The HAEVA JUB will be positioned at Hoton, interfacing with the platform from the 5th April at the earliest (weather dependent). The Project is expected to last for a duration of 50 days. The HAEVA JUB occupies a much larger footprint that the Hoton installation, therefore, whilst the HAEVA JUB is on location, the HAEVA JUB Aids to Navigation (AtN) will be the sole AtNs for the duration of deployment and the Hoton platform will be blacked out. The positioning of the HAEVA JUB will require four mooring anchors which will be positioned at the following locations (ED50 UTM Grid Zone 31):

•    Starboard Bow: E 382 609, N 5 963 278•    Starboard Aft: E 382 056, N 5 962 750•    Port Aft: E 381 446, N 5 963 440•    Port Bow: E 382 038, N 5 963 924

Location Coordinates (WGS 1984):

Hoton: Latitude (WGS84):  53° 48' 10.0" N, Longitude (WGS84):  01° 12' 22.6" E HAEVA Working Position: 53° 48' 13.106" N, 001° 12' 28.308" E

Attached is a Notice to Mariners issued by RWE concerning Exposed or the risk of Exposed Cables within the Robin Rigg Wind Farm.

Please Read the Updated Notice

Regards  :  Tom Watson

Tel……07903 173 624

During OEG's return scope on EA2 with the Northern Victoria the vessel has a total of 24 archaeology targets to relocate, 5 abondonded fishing nets that are to be recovered to deck or relocated away form planned works locations and multiple debris relocations using a combination of orange peel grab, ROV and ROV/SMT techniques. 

UXO disposals will be carried out using Low Order techniques. There are no High orders expected to be carried out by the disposal team and securite broadcasts will be made at certain times around disposals to all vessels in the area to keep thier distance. 

Sub-Sea Export Cable Repair - N-Sea - will act as the principal contractor using the dedicated DP2 Vessel ‘GEOQUIP ELENA’

‘GEOQUIP ELENA’ can be expected to arrive on-site on or around Saturday 18th. April (picture along with vessel details are on page 3 of the attached notice)

PLEASE READ THE ATTACHED NOTICE

All MARINERS PLEASE NOTE THAT AT ALL TIMES WHILE ON-SITE TO AFFECT REPAIR ‘GEOQUIP ELENA’ WILL BE RESTRICTED IN HER ABILITY TO MANOEUVRE

THEREFORE, WHENEVER THIS VESSEL IS ON-SITE A WIDE BERTH, MINIMUM 500 METERS, IS REQUESTED AT ALL TIMES AND PASSING VESSELS ARE REQUESTED TO REDUCE SPEED IF POSSIBLE.

Small chartlets included with the NtM show the coordinates and the route of the Barrow Export Cable running along the seabed

IN THE LEAD UP TO AND FOR THE DURATION OF THIS SURVEY/REPAIR FISHERMEN ARE REQUESTED, AND ADVISED, NOT TO SET ANY GEAR CLOSE TO OR ALONG THE LENGTHS OF THE CABLE SHADED RED ON THE CHARTLETS - PAGES 2 & 6 - ON THE ATTACHED NOTICE.

PLEASE RE-LOCATE ANY GEAR ALREADY IN CLOSE PROXIMITY – IF IN DOUBT PLEASE CONTACT ME

‘GEOQUIP ELENA’ will keep a listening watch on VHF Channels 16 & 12 and can be contacted for information relating to vessel movements only.

 PLEASE READ THE NOTICE

Page 2 : General information along with two small chartlets showing route of BARROW EXPORT CABLE 

Page 3 : Pictures and details of GEOQUIP ELENA

Page 4 : General schedule of repair works – plus General Safety Advice

Page 5 : Contractors contact details (if required)

Page 6 : Small Chartlet showing ‘work area’ along with co-ordinates

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

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

……………………………………………………………………………………………….

 If in any doubt please contact me

 Regards  :  Tom Watson

Tel………..  Mobile 07903 173 624

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking a subsea inspection in the Outer Hebrides marine area. Please refer to Figure 1 that highlights the location. 

Given the different conditions and water depths anticipated on site, a range of vessels will be available for the project, detailed overleaf. 

The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates listed in Table 1.

Type See detailed map on our bulletin website

A survey will be performed with survey vessel Miranda. 

The survey will be performed at the following locations:

• Wingate NUI platform
• Route from the Wingate NUI platform up to the D15-FA-1 platform
• A6-1
• A6-2
• L6-B1
• D12-B
• D12-3

Each location we need to survey a 500x500 meter box from the centre location (positions given in the activity location)

The survey will also include towing of survey equipment and a grab sampling campaign near the Wingate NUI platform.

IWS Windwalker and supporting CTVs will commission 95 WTGs at the locations set out in section 2.2 ofEAT NTM 008-2026 Wind Turbine Generator Commissioning Campaign.Installed WTGs shall be marked with the following aids to navigation:LightsFl Y 2.5s light (visible through 360°)Minimum 2 nm range

Partially constructed monopiles shall be marked with the following aids to navigation where a transition piecehas not been installed:

LightsFl Y 2.5s light (visible through 360°)Minimum 2 nm rangeWeather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven daysa week).During operations, the IWS Windwalker will have restricted manoeuvrability as defined under COLREGS(International Regulations for Preventing Collisions at Sea, 1972). They will display the appropriate day shapesand lights and will transmit an Automatic Identification System (AIS) message.

Program Schedule:The IWS Windwalker will mobilise at the Port of Lowestoft, with first commissioning activitiesanticipated to start around 18/03/202

The CTVs will mobilise at the Port of Lowestoft and support the IWS Windwalker throughout thecampaign.

WTG installation is expected to be completed end of Q4 2026.

*Servicing Operations

Servicing of the acoustic monitoring stations will take place from week commencing 30 March 2026, subject to weather conditions.

Operations will involve service vessels working at or near station positions for short durations during suitable weather windows.

Mariners are advised to exercise caution in the vicinity of these positions during active operations.

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.

Total vertical height of unit: approx. 5 m above seabed.

Minimum clearance above highest point: 55 m in shallowest locations. 

Each acoustic monitoring system will comprise: 

• Acoustic release system

• Fish tag detection system (69 kHz)

• Broadband hydrophone and cetacean click-train logger

• Mooring frame with integrated components

The activity will take place within Blocks A – G, Welsh Channel to Douglas (see block coordinates in Table 1 in the attached notice) along the Liverpool Bay CCS Cable Survey Blocks (See Figure 1 in the attached notice)  

The corridor has been divided into ten separate Blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders. 

 This activity will take place within the Welsh Waters only Blocks A – G     

 The Voe Vanguard is estimated to arrive on location ~7th April working 24 hours a day for ~ 12 days. 

 Mariners are advised to always maintain a safe distance (of at least 500m) from the Voe Vanguard   

 For further information, contact details for the Company Fisheries Liaison Officers are provided in Section in this notice 

Nearshore Geophysical survey, performed under a Marine Licence issued by the Marine Directorate Licencing Operations Team (MD-LOT) – MS-00011499 and a Licence issued by Crown Estates Scotland - ref. AMR/CES/EI-0067.

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

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 Well-Safe Protector will mobilise from Aberdeen to the Seven Seas (48/7c-13y) location to undertake P&A activities, on or around the 15th April 2026.  Operations are expected to take a total of 40 days and to be complete by the end of May 2026.  Following this activity, the rig will move to Grove G5 (49/10a-4) location to undertake P&A activities. It is expected to be at Grove G5 for 30 days.  All activities are expected to be complete by the end of July 2026. This date is subject to change depending on weather and operational requirements.

These works are part of a Regional Seabed Monitoring Plan (RSMP) applicable to the main aggregate dredging regions around the UK and will be conducted on behalf of Heidelberg Materials. The survey will employ the use of a 0.1m2 Hamon grab to obtain sediment samples of the seabed. The works will be completed by personnel from OEL on the survey vessel Seren Las. This notification is intended for circulation to all interested parties undertaking or managing activities in the vicinity of the planned survey works.

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore dredging and dredge area maintenance campaign in the southern North Sea, utilising seven vessels. These vessels will be mobilising from the port of Hartlepool and working 24hrs a day.

The scope will include removal and temporary storage of dredge material within the NEP Pipeline and Cable Construction Area Block 1. Relevant permissions in place are provided in Section 2

The vessels are estimated to arrive on location on ~27 March 2026. Initial dredging activity is expected to take 71 ~ days to complete (weather dependant) and continued monitoring and maintenance of the dredge area will continue until pipelay activities begin. Updates will be issued via regular NEP Notice of Operations during the activity.

Mariners are advised to maintain a safe distance (of at least 500m) from vessel locations at all times.

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7.

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

Three submerged passive acoustic monitoring (PAM) moorings (see Figure Mooring Design) were deployed by SAMS Enterprise in June 2025 within the boundary of the Southern Trench Marine Protected Area and will remain in situ for two years with a service interval every 5 – 6 months. The moorings will have no surface expression (i.e. no surface marker buoy) and the top of the mooring extends approximately 4-6m above the seabed. 

The first service visit of the three PAM moorings took place in October 2025 (18/10). The works were executed from Fraserburgh Port by the vessel ARTEMIS (see Artemis Pic).

MARINERS ARE REMINDED to navigate with caution and keep continued watch on VHF Ch. 70 / 16 when navigating the area.

Equipment were deployed at the following location (WGS84) in October 2025 (18/10/2025):

The three PAM moorings were deployed within the Southern Trench MPA (see figure "as built 2025"):

Vessel details:

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Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of April to March 2027. 

Between the 1st March and the 30th April 2026 (subject to weather delays), mariners must observe an approved safety zone of 500m whenever the Geoquip Elena vessel is carrying out essential maintenance work at WTGs C02 or A02 (see chart provided). A minimum separation distance of 500m is also requested when the vessel is working between these WTG positions or observed manoeuvring into position. Note that the Geoquip Elena shall be considered as limited in manoeuvrability, as defined within the COLREGs (1972).

The Iceni Warrior and Iceni Defiant (CTVs) will be supporting the Geoquip Elena with the maintenance work.

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. 

Fugro will conduct Seabed CPT at potential turbine locations within the Caledonia Site Boundary, advancing the cone until refusal is achieved. This is an in-situ test to determine seabed soil properties, and it does not involve any sediment removal. 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).

The Seabed CPT work is part of a larger geotechincal survey campaign that will be undertaken within the Array Area. Details of the subsequent scopes in the campaign, and the vessels undertaking them, will be issued as seperate Kingfisher Notices before they are due to commence.

The NtM has been revised to reflect the new mobilisation date and has been re-uploaded below. 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).

Activities to be Undertaken during the Campaign

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

Gawain E&A Well 49/29a-7 - Backfill over mattress

Leman 27 J - PL206 & PL207 Subsea Cutting

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

Davy North & East - Remedial Cutting & Debris Removal

Ravenspurn North Gas Compression Deck concrete base gravity structure - Structure inspection

Amethyst A1D - Rig Pre Work

Trent - Jacket Inspection

Durango - General Visual Inspection

Wenlock - Subsea cutting & Rig Pre Work

Garrow - Subsea cutting & Rig Pre Work

Kilmar - Subsea cutting & Rig Pre Work

Decommissioning P&A Pre Works will be conducted at Leman Southwest in the Southern North Sea. The campaign has started in March but the visibility at the location has been poor. The MSV will continue to attend the location in order to carry out the pre work.

The proposed pre works will utilise the Wagenborg Kingsborg to clean and prepare the well in advance of the P&A activity expected in Q2 2026.

Galloper Windfarm, RWE - NTM: GWF-O&M 05 – 2026 – WTG Blade Inspections.

Please be advised that Galloper Windfarm will be carrying out WTG Blade Inspections. The campaign will be using the HST Tynemouth/Seacat Liberty/Seacat Mayflower across North and South fields

The vessel will be operating Daytime only, commencing 02/04/2026– weather dependant.

An Exclusion zone of 250 metres will be required whilst the work scope is underway.

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This notice is issued as a follow on to the active notice "Weather Buoy Installation – Rosebank Offshore Development Area" 

The vessel Deep Explorer will mobilise to the previously installed weather buoy location in order to recover the buoy, which has been weather damaged.Once recovered a replacement meteorological buoy will be deployed at a new location, as detailed below:

New Buoy Deployment Position:Latitude: 60° 00'.45.84" N Longitude: 003° 49'.27.89" W

All vessels are requested to maintain a safe distance from the Deep Explorer during recovery operations and from the replacement buoy once deployed.Once operations are complete, the original notice "Weather Buoy Installation – Rosebank Offshore Development Area" will be updated to reflect the new buoy position.

Pressure testing of newly installed gas export pipeline

Connect downline from vessel into gas export PLEM and pressure test with filtered dyed seawater

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It should be noted that SSE Renewables are not expecting fishers to relocate gear - on this occasion the vessels will aim to work around any gear on location. A scouting/guard vessel will also be contracted to operate ahead of the survey vessels to ensure that this can be achieved. There will be no towed gear as part of this survey. 

The Zenith and Quest (operated by Fugro) will commence operations on 6th April and 25th April, respectively, for a duration of 207 survey days. To account for weather delays and other eventualities, we would like to extend the validity of this notice until 30 November 2026. 

The guard vessel will be either the Tranquillity S or the Reaper alternating approximately every 21 days

Mariners are hereby advised that the Northern Endurance Partnership (NEP) is continuing to undertake an Offshore Passive Acoustic Monitoring (PAM) Survey within the Southern North Sea. This survey deployed of a series of PAM moorings to support ongoing environmental monitoring activities. 

Servicing of the equipment will be carried out by the BB Ocean estimated to take place on the 30th March 2026.  

Seabed moorings and Cardinal buoys remained in their original positions during servicing. Current positions of equipment are provided below in Tables 1 and Figure 1 and 2 in the attached notice. As -Laid positions will be provided post servicing.  

The 11 PAM recording stations at the fixed locations (via moorings anchored to seabed) will be serviced and replaced to original their positions. All moorings will remain in place throughout the remaining ~6-month monitoring period. 

Equipment details are as follows: 

• 1 x Acoustic Spatial Capture – Re-Capture (ASCR) Array: 7 x moorings deployed in a closely spaced configuration (~50 m separation between ARUs) 

• 2 x Localisation Arrays: 2 x seabed landers, within the ASCR array 

• 3 x Standalone Devices: 3 x moorings, distributed across the survey area for wider spatial coverage 

• 4 x cardinal marker buoys 

Coordinates are provided in Table 1 and are illustrated in Figures 1 and 2 below. Mariners are advised to maintain a safe distance from the deployment locations at all times. 

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7 of the attached notice. 

The HLVs will be moblising to the Hewett feild in on or around the 1st of April. The HLVs will be completing preparation activites, and lifting and removing the topsides and jackets in the period April to August 2026. 

Mariners are advised that cable lay and burial works are due to commence at the NeuConnect UK cable offshore and nearshore at the landfall site on the Isle of Grain, Kent. Works will be conducted by Prysmian PowerLink and supported by their subcontractors. 

Installation works are composed of the three operational campaigns: 1. Campaign 1 (C1) – Kilometre Point (KP) 0 – KP 56.  2. Campaign 2 (C2) – KP 56 – KP 199.  3. Campaign 3 (C3) – KP 199 – KP342 (outside UK EEZ Boundary)  

Table 1: Estimated schedule of NeuConnect operations in the UK  

Activities undertaken as part of cable installation works are as follows: • Landfall works • Pre lay • Cable lay (this NtM) • Post lay 

All operations require 24-hour working. Cable Lay- C1 Cable lay operations for C1 were completed November 2024.  Cable Lay – C2  Cable lay operations for C2 were completed December 2025. Cable Lay – C3 The recovery of cable and joint is to commence on 09 February until 13 February. The cable installation began on 09 February and completed works in UK waters on 17 March 2026. Support vessels may assist with specific tasks. Post lay and burial activities remain ongoing. 

Vessels will shelter in Port of Sheerness in the event of weather downtime.  

 Details of vessels and guard vessel deployment locations are provided in the attached Marine Notice 

Partrac Ltd., on behalf of XOCEAN and Scottish & Southern Electricity Networks (SSEN), is deploying a metocean seabed frame mooring for an interconnector cable project between Holm on the Orkney mainland and the Isle of Burray. Details of the deployment position are provided below in Table 1 and Figure 1, and the frame will be deployed for 30 days.  

Partrac is planning to carry out the frame deployment within week commencing 9th February 2026 over one day, weather permitting, using the vessel Green Isle (Figure 3). During deployment and 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. 

Survey Area: Figure 1 below indicates the operational area which is shown by the red boundary. This is outlined in Table 1 below also. The seabed frame position is detailed in Figure 2 with coordinates in Table 2. 

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Mariners are advised that a survey vessel and towed subsea equipment will be used in dredge areas 531 and 526 in the central Bristol Channel, each area separated by Flat Holm and Steep Holm Islands.

Geophysical work will be carried out by Spectrum using the survey vessel the Spectrum 1 from the week commencing the 23rd of March, for a duration of up to 1 month.

Mariners are advised to keep a safe clearance distance from the vessel due to the vessels reduced manouverability as a result of mounted and towed survey equipment on the Spectrum 1.

Equipment that will be used by the vessel includes:

• Multibeam Echosounder (vessel-mounted)
• Side Scan Sonar (towed)

Vessel has undertaken some of the works, and ha snow left location, with view to returning at later date.

Survey works to last 14 - 21 days.

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

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. Boulder clearance will focus on the wind farm site and the export cable 2 route. 

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 19th of March.

For A4, this involves disconnecting the well from the Gas Injection / Lift system at the MDS manifold, and tying the well back to the production system, teeing into the A14/A6 production system (PL4863) at the MDS.  6” rigid spools shall be installed and leak tested. For A2y, this involves disconnecting the well from the Gas Injection / Lift system, and tying the well back to the production system, teeing into the A12/A1 production system (PL4004) at the A12 T-piece. 6” rigid spools shall be installed and leak tested. Gas Lift supply is to be maintained by connecting together the 2.5-inch (PL2858) and 6-inch (PL4813) flexibles (previously disconnected from A2y) using a 1.5m long, 6”x2.5” reducing spool. These flanged connections shall be leak tested.

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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 17/03/2026: Vessel Gaoth na Mara (details below) will mobilise from Peterhead Port on 19th March for operations 19th-21st March.

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.

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections in the Argyll marine areas. Please refer to Figure 1 - Figure 2 that highlights each cable location. 

Given the different conditions and water depths anticipated at each site, a range of vessels will be available for the project, detailed overleaf. 

The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates listed in Table 1. 

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Survey Activities: XOCEAN is planning the collection of geophysical data using remotely piloted Uncrewed Surface Vessels (USVs) along a proposed cable route corridor in Orkney, from the islands of Sanday to North Ronaldsay. The 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. 

Dates/Duration: Operations are expected to commence around 20 March 2026. It is expected that the survey activities shall be completed within 30 days (subject to weather). 

Fishing Gear Clearance: No fishing gear clearance is presently being requested for these surveys. 

Situational Awareness: Although the USVs are uncrewed, they are remotely piloted throughout the 24-hour operation. The USV sends real time images and situational awareness data over satellite to allow this monitoring. The situational awareness aids available are listed below. 

Recommencement of Rosebank development subsea activities by the Deep Explorer within an area bounded by the following coordinates.

Position No. 1 NW Corner - 61°03.850'N 003°54.360'W 

Position No. 2 NE Corner - 61°03.940'N 003°39.690'W

Position No. 3 SE Corner - 60°58.770'N 003°39.580'W 

Position No. 4 SW Corner - 60°58.680'N 003°54.210'W

These Positions above are also covered by an existing Notice named: "Marine Installation Operations Rosebank Development Area"

Vessel Deep Explorer will conduct various different Sub Sea Operations within the Rosebank Development AreaThe work scope consists of the following activities:

• Installation of 5 x anode skids within FPSO location
• Pre-commissioning activities - Tie-in, flushing, leak testing of Production Gas Lift & Water Injection flowlines – Rosebank field
• Re-lay 150m of flowlines – Rosebank field
• Survey scope - Rosebank field
• Boulder relocation – Rosebank field

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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Type See detailed map on our bulletin website

The Odfjell Drilling operated Deepsea Atlantic mobile offshore drilling rig will be conducting drilling and well operations in the Rosebank field development area over various subsea templates for a period of approximately 18 months. 

The rig will be operating on DP, therefore there will be no moorings deployed. 

Deepsea Atlantic call sign is 2CEV5. 

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The Harris and Barra fields and 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 approximatety 150msw to 165msw. The Western Isles production storage and offshore vessel (FPSO) has been been disconnected and no longer in the area. The Well Enhancer will be working on Wells at the North and South Drill Centres with ROV support, plus possible diving operations if required. There will be SIMOPS with the CSV Boka Nothern Ocean that will be in the Dana Western Isles area carryout decommissioning operations with ROV only support.

Marine survey operations will be carried out within the defined survey area between Hythe and Winchelsea from mid March 2026 to the end of August 2026. The works will consist of multibeam echo sounder (MBES) survey operations and limited seabed sampling at selected locations within the survey extent.

Survey activities will be undertaken by Northern Gale and Northern Breeze. One or both vessels may be restricted in their ability to manoeuvre while conducting survey lines and while sampling operations are in progress. Mariners are requested to navigate with caution in the vicinity of the survey vessels, maintain a safe passing distance, and keep a good lookout at all times.

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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 have developed an Environmental Monitoring and Mitigation Plan to safeguard marine wildlife. The findings will be made 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 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 has been redeployed in the Morlais zone for a further 18-month period of data collection.As this period of research and development comes to a close, the MCRP wish to notify you of the demobilisation of the Marinus buoy circa early April, weather dependent.

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The mooring piles will be cut below seabed level and the cut sections recovered.

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 in the attached NtM.

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.

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

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

Survey vessel: VOE Vanguard (IMO 9809693; MMSI 232008636; Call Sign MEBN9

On behalf of Inch Cape Offshore Ltd, Seaway 7 shall commence the installation of 54 WTG foundation transition piece components.

The transition pieces will be transported from the Port of Leith to the Inch Cape site and installed by the heavy lift vessel Seaway Alfa Lift.

Alfa Lift is expected to arrive at the Inch Cape site on or around the 17th of March to commence installation which will continue for several months, further details are in the attached notice to mariners.

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 remain in place until a decommissioning option is finalised. Wellheads will be left in place with existing fishing protection structures subject to a separate well plug and abandonment campaign, which will commence in 2026.

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 will re-commence from 15th March 2026.

Please be advised that from around 20 March 2026 companies of the Anglian Offshore Dredging Association (AODA) will be undertaking geophysical surveys of aggregate dredging areas in the Anglian Region. The survey will employ a hull mounted multibeam sonar only to acquire bathymetric data.

The geophysical survey works will be completed by personnel from GeoXYZ from the survey vessel GeoSurveyor XI. The work is expected to take approximately 2-3 weeks in suitable weather conditions, although adverse weather conditions may mean that the total estimated survey time is spread over a longer period.

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

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections across the Outer Hebrides marine areas.

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

Vessel Details

The vessel conducting the works will be restricted in its ability to manoeuvre and will display the appropriate lights and shapes.

Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations.

The vessel will monitor VHF Channel 16 throughout survey operations. Mobile contacts for the vessel are listed at the end of the attached NtM.

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Wind Osprey and Wind Pace will install 95 WTGs

Installed WTGs shall be marked with the following aids to navigation:

Lights

• Fl Y 2.5s light (visible through 360°)
•  Minimum 2 nm range

Partially constructed monopiles shall be marked with the following aids to navigation where a transition piece has not been installed:

Lights

• Fl Y 2.5s light (visible through 360°)
• Minimum 2 nm range

Weather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week).

During operations, the Wind Osprey and Wind Pace 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 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.

It is requested that mariners avoid activities which are likely to disturb the seabed within a 500m Radius of this location until the exposed export cable has been re-investigated. A further Notice to Mariners will be issued to confirm the course of action we will be taking to rectify this. Please note that the standard safety rules apply when fishing in or near wind farms and associated cables. All mariners are requested to make themselves aware of their obligations for conducting activities over buried and protected cables under International and UK Cable (Sub-sea) Protection Legislation. 

Mariners are reminded to navigate with caution and keep continued watch on VHF Ch. 12 / 16 when navigating the area. The Marine Coordination Centre will be responsible for monitoring and policing the Safety Zone and can be contacted directly for advice. Further information on the risks to fishing adjacent to subsea cables can be found in Weblinks: www.kis-orca.eu https://www.seafish.org/article/kingfisher-bulletin 

Wave buoy 

Model: Sofar Spotter Buoy

Diameter: 0.43 m

Colour: yellow

LED light: 0.5s flash every 2.5s with a visibility of at least 1 nm.

Mooring buoy

Model: Sealite SL-MB-1000

Diameter: 1 m

Colour: yellow

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.

All mariners and stakeholders are advised that a Passive Acoustic Monitoring (PAM) mooring array for the purpose of monitoring marine mammals’ detections is currently deployed 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 (i.e. up to August 2027) 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.

 During a servicing trip on Saturday 21st February, an item has been dropped to the sea during the recovery of the Passive Acoustic Monitoring mooring at Carnoustie, coordinates shown in the attached notice to mariners.

One PAM mooring was redeployed during the service trip on 21 February 2026, locations and coordinates for the passive acoustic monitors currently in place are shown in the attached notice to mariners.

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Survey works to last 14 - 21 days.

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

TAQA (duty holder) will be conducting decommissioning activities at the East Brae installation commencing between the 12th of May 2026 and 11th June 2026 for circa 60 days. This work will include preparation works for Topside and Conductor removals.

Vessels will be operating within the 500m safety zone of the platform and on occasion, will be at stand-by, near to the boundary of the 500m zone.

Vessels in attendance will be the Balder and Sleipner for the work scopes.

The ERRV Vos Traveller will be performing standby duties.

Activity 1: An Unexploded Ordinance (UXO) Investigation survey utilising an ROV (Remote-Operated Vehicles) 

The survey will carry out targeted investigations of potential UXO targets (pUXO) within NEP Pipeline and Cable Construction Area Blocks 1 to 5 (See Figure 1 and Table 1 in the attached notice) >10m water depth.  

The positions of any targets identified as confirmed Unexploded Ordinance (cUXO) will be shared within a separate notice and posted as a hazard on the Kingfisher Bulletin Service.   

The vessel is estimated to arrive on location ~27 February working 24 hours a day for ~ 45 days. 

 Activity 2: Once the UXO identification campaign is completed the Olympic Taurus will begin a targeted Boulder Re-location campaign > 10m water depth within NEP Pipeline and Cable Construction Area Blocks 1 to 5. An update to this notice will be provided once this activity is schedule to begin along with any re-defined boulder re-location activity area coordinates.  

 Mariners are advised to always maintain a safe distance (of at least 500m) from the Olympic Taurus. 

 The position and extent of the NEP Pipeline and Cable Construction Area Blocks (See Figure 1 and Table 1 in the attached notice) are currently under review and will be updated once the review is complete. 

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided within this bulletin. 

The works will commence around the 21st of February 2026 continuing until approximately Q2 2027.  The works will be continuous, 24 hours a day.  A chart of the DBB construction area boundary coordinates and a table of WTG location coordinates is provided below. A running list of the completed WTG installations and the next locations to be installed is presented in the Weekly Notice of Operations.

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

During operations, a Statutory Safety zone of 500m radius will be in place around the Voltaire during the installation of WTGs

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking an offshore Unexploded Ordinance (UXO) Investigation survey utilising ROV (Remote-Operated Vehicles) within the southern North Sea. The survey will be conducted by the vessel Glomar Wave (see section 6 of the attached notice) 

 The survey will carry out targeted investigations of potential UXO targets and conduct clearance of the targets if required within NEP Pipeline and Cable Construction Area Blocks 1 to 5 (See Figure 1 and Table 1 within the attached notice) >10m water depth. The position and extent of the NEP Pipeline and Cable Construction Area Blocks are currently under review and will be updated once the review is complete.   

 The positions of any targets identified as potential Unexploded Ordinance (pUXO) will be shared within a separate notice and posted as a hazard on the Kingfisher Bulletin Service.   

 The vessel is estimated to arrive on location on the 1st March, working 24 hours a day. The investigation is expected to take ~ 60 days to complete (weather dependant)  

 Mariners are advised to maintain a safe distance (of at least 500m) from the survey vessel locations at all times. 

 For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer. 

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

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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)

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. 

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.

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

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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).

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.

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. 

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.

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.

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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.

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.

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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.

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.

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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.

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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.

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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.

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.

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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.

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

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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.

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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. 

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.

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.

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. 

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