Please keep clear of and do not damage subsea cables/structures. You risk the loss of your gear and catch, and international communications can be disrupted. These cables carry high voltages and can be dangerous to life. Many cables have high breaking strains, some over 70 tonnes. Cables will usually lie buried in the seabed, although because the seabed can move, there is no guarantee they will remain in the same place.
Show PageIt is essential to be aware of the locations of subsea cables and renewable energy infrastructure, when fishing in the vicinity of such structures. It is essential you have all the information in relation to their positions available to you and the KIS-ORCA project is designed to provide exactly that for all seabed users. Charts, fishing plotter files and an interactive map, showing subsea cables and renewable energy structures surrounding the UK, may be viewed or downloaded, free of charge.
Show PageThe potential risks associated with the offshore renewable and subsea cable industries come in two distinct categories - surface structures and subsurface structures. Each type of structure may potentially be a risk to fishing activities. The information below describes these hazards, with the subsequent sections explaining the emergency procedures.
Show PageTidal devices exploit kinetic energy in the tidal flow of water caused by the interaction of the gravitational fields of the earth, moon and sun. Tidal currents are magnified by topographical features, such as headlands, inlets and straits, or sea bed channels. Many of the devices that use these currents are broadly similar to submerged wind turbines. Sea water is around 800 times denser than air but average flow speeds for viable projects are of the order of one fifth of corresponding wind speeds, giving a power density of around 5-10 times. This means that for a tidal device of the same rating as a wind turbine, the rotor will be smaller. Individual tidal devices are unlikely to reach the same rated power as offshore wind turbines; however, as to have sufficient space to deploy such large devices requires development of deeper water sites that generally have less significant tidal flows. EMEC has identified four main types of tidal energy convertors that are outline below.
Show PageWaves are created by the interaction of wind with the surface of the sea, sometimes over very long distances. The size of the waves is influenced by wind, the local seabed bathymetry (which can focus or disperse the energy of the waves) and currents. Waves offer a large source of energy which can be converted into electricity by a wave energy converter (WEC). Some wave energy converters have been developed to extract energy from the shoreline, others from waters offshore, some with a hydraulic power take-off system and some with an electrical power take-off system. EMEC has identified six main types of wave energy converter that are outlined below.
Show PageThe United Kingdom's wave and tidal stream energy industry is the current global leader, with more installed capacity than the rest of the world combined. Our strength has been built on established British marine engineering skills, the creation of world-first testing facilities and the strength of the energy resource found in UK waters. The UK is proud to have developed the first commercial scale wave and tidal stream projects in 1998 and 2003 respectively but the industry is now on the cusp of commercial viability as we move through the phases of development.
Show PageOnce a developer has obtained a lease from the Crown Estate they will start to appraise the zone or lease area. This requires a number of surveys to be completed including boat or aerial based bird and marine mammals surveys, benthic grabs and fish surveys.
Show PageOffshore wind farms consist of a number of connected elements. These include the turbines, foundations, array cables, offshore substation, export cable and onshore substation and infrastructure. These items are installed using a range of different vessels and then serviced by either smaller crew transfer vessels or helicopters.
Show PageOffshore wind farms consist of a number of wind turbines which sit on foundations, secured to the seafloor, which produce electricity. This electricity is transmitted to where it is needed through a series of cables and substations. The first offshore wind farm was installed in Denmark in 1991 and the industry has grown rapidly since then with 3.3GW installed across Europe (1.8GW of which is in the UK). China, US, Japan and South Korea have also started to develop offshore wind farms.
Show PageThe UK is the world leader in offshore renewables. We have more projects installed, more in construction and more in development than any other country in the world.
Show PageSubsea telecommunication cables have a very long history. Since the installation of the world's first submarine cable across the Dover Strait in 1850, Subsea cables have been essential to the worlds communications infrastructure.
Show PageUnder a Cable Maintenance Agreement and on notification from a Maintenance Authority, a cable repair ship operator will mobilise one of its vessels to conduct a repair on a subsea cable. The maintenance authority will provide an estimated position of the cable fault based on tests carried out from the cable Terminal Stations located either end of the marine cable. Permitting, Charting, and existing cable information is assessed prior to the vessel departing.
Show PageSubmarine cables are very reliable, however, there are occasions when a repair to a cable becomes necessary.
Show PageAt the planning and installation phase of a submarine cable project one of the most effective methods of protecting a submarine cable from damage caused by external aggression is to bury the cable, usually with a sea plough.
Show PageOnce the requirement for a cable system has been identified and funds raised to build it, the first thing which happens is that a cable manufacturer and installer is contracted by the cable system parties.
Show PageModern Fibre optic cables can carry many millions of telephone calls, together with huge amounts of video and internet data. Approximately 95% of the world's telecommunication requirements are met by submarine cables. Cables are used because of their high reliability, capacity and security. Cables have an insignificant delay compared to satellite and are most cost-effective on major routes, hence communications costs are cheaper than satellites.
Show PageOffshore windfarms and subsea cables are increasing in number around the shores of the UK and the potential risks to fishermen, associated with these structures, need to be recognised and managed in a responsible way.
Show PageThis section contains information relating to Renewable Energy Structures, from design to installation, maintenance to future trends.
Show PageThis section contains information relating to Subsea Telecoms and Power Cables, from design to installation, maintenance to future trends.
Show PageThe geophysical and geotechnical offshore survey for the Northern Endurance Partnership (NEP) (bp) which commenced on 14 April 2025 is now expected to be extended until the ~ 03rd August 2025.
The geophysical and geotechnical offshore survey for the Northern Endurance Partnership (NEP) (bp) is scheduled to commence on 14 April 2025 and is expected to last for approximately 75 days, allowing for potential delays due to adverse weather conditions. The survey will utilise geophysical survey equipment (Multibeam Echosounder (MBES), Sidescan Sonar (SSS), Sub Bottom Profiler (SBP) and Magnetometer equipment) some of which will be towed up to 150 metres astern of the survey vessel. It will also utilise geotechnical equipment (Cone Penetration Test {CPT} equipment, Vibracorer and Day Grab sampler). The extent of the planned survey within the NEP Teesside Cable Survey Area >30m in depth shown in Figure 1 of the attached notice. Coordinates of Teesside Cable Survey Area also provided in Table 1 in the attached notice. An NFFO Offshore Fisheries Liaison Officer (OFLO) will be onboard the vessel during the survey available on VHF Channel 16. Contact details for the Fishing Industry Representative and Company Fisheries Liaison Officer are provided in the attached.
See detailed map on our bulletin websiteThe Titan Endeavour will undertake a reconnaissance survey to assess the best method for recovery on Saturday 19th July. It will survey using an ROV, and will be completed by 1700 that day. This survey is not a recovery attempt; it will provide information about Vibrocorer (VC) conditions and the best method for the recovery that will take place at a later date (updates will be notified in due course)
Please be advised that during geotechnical survey operations within the Morgan Array Area the vessel Ocean Observer dropped a geotechnical vibrocorer on the seabed. The height of the dropped vibrocorer is approx. 5m and is located in mean average low water depth of 40m.
The approximate location of the dropped vibrocorer on the seabed is marked by a tethered Norwegian buoy appended with the vessel Ocean Observers IMO number 8511275 (Table 1).
The Titan Endeavour will undertake a reconnaissance survey to assess the best method for recovery on Saturday 19th July. It will survey using an ROV, and will be completed by 1700 that day.
This survey is not a recovery attempt; it will provide information about Vibrocorer (VC) conditions and the best method for the recovery that will take place at a later date (updates will be notified in due course)
See detailed map on our bulletin websiteMariners are advised that the Special Mark 2 (SP2) has successfully been reinstated by MV Kingdom of Fife on 17th July 2025.
Show MoreUPDATED 18/07/2025 - See attached NtM "CB0282 1015 Coll-Tiree NtM v5.0". Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be installing a new subsea cable between Coll and Tiree. Please note the area is displayed on the map as individual points due to a technical error. This is one area. Please refer to the NtM for a more accurate map
During operations the vessels Blue Sky, Sarah Grey, and Rock bag vessel will be restricted in their ability to manoeuvre. Whilst operations will seek to minimise disruption on the width of the main navigation channel, some disruption may be unavoidable during operations within the working corridor.
Operations will be conducted over 24 hours and are weather/tide dependent.
Should any vessel wish to come within 500m of the vessels, then direct communication with the Master / Operator is required. Vessels will display the appropriate lights/day shapes for their operations.
See detailed map on our bulletin websiteVessel 'Edda Flora' will conduct a ROV survey on the Martin Linge pipeline according to the given coordinates. Note: Survey coordinates for the UKCS only.
Vessel: Edda Flora,
Call sign: LAJW3
Water depth: approx. 70-150 m
See detailed map on our bulletin websitePetrofac will undertake the cut and recovery of the Leverett CAN-basic using the Island Valiant in July / August 2025.
The Island Valiant will mobilise to the Leverett location around the 28th of July. Using an abrasive cutting tool the CAN will be cut and recovered to the vessel. If the cutting tool is unsucessful there is a contingency option to undertake explosive severance.
See detailed map on our bulletin websiteAdditional information for Trawlers and Fly-Shooters: the area where the nodes are located on the seabed. Location of the nodes that Havila Subsea has on the seabed as of 16 July 2025. Havila Subsea has deployed all nodes on the seabed and begun recovering nodes from the south, working its way north. Please call Havila Subsea or Oceanic Champion on VHF ch 16 to get the latest update if you plan to fish around the survey area.
16.07.2025 - Update: Additional information for Trawlers and Fly-Shooters: the area where the nodes are located on the seabed.
Location of the nodes that Havila Subsea has on the seabed as of 16 July 2025.
16. July
Havila Subsea has deployed all nodes on the seabed and begun recovering nodes. We work our way from south to north in the recovery process..
The estimated end of the survey is by midnight on 17 July
Please call Havila Subsea or Oceanic Champion on VHF ch 16 to get the latest update if you plan to fish around the survey.
See detailed map on our bulletin websiteSeafox 7 remains jack up alongside and supporting the comissioning of the Offshore Converter Platform.
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:
All vessels will be arriving from non UK Ports throughout.
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 Protector 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) “Rem Power” & Daughter craft “Rem Transporter” continues to support the SOWF project throughout the construction of the offshore windfarm.
The Austri Enabler is expected to commence operations on or around 31st July 2025.
SOVs shall be transiting to / from the Sofia Array and the port of Blyth / Sunderland throughout this period.
Crew Transfer Vessel
The Crew Transfer Vessel (CTV) “MHO Balder” commence operations at the Sofia OWF.
The CTV “MHO Boreas” is expected to commence operations on or around 1st August 2025
All vessels can be contacted on VHF 16 for further information as required reference proximity / nearby operations etc.
See detailed map on our bulletin websiteAll Mariners are advised that the SGRE Vessel “Wind Peak” continues Wind Turbine (WTG) Generator installation at the Sofia Array. The vessel will also be supported by ongoing commissioning activities carried out with the following SGRE Vessels: “IWS SeaWalker”, “FOB Swath 9” & “FOB Swath 10”.
The following table highlights WTG installation progress and next 7 day forecast.
Total WTGs Installed (100 in Total) |
WTGs Installed (Since Previous Update) | WTGs Location Forecast (Next 7 Days) |
29 | R01, P01, Q01, N03, | N05 - Trip 5 / L05, M01, L01, K01, J01, N01 – Trip 6. |
Vessels operational during these works are as follows:
Vessel Name | Vessel Type | Length (M) | Gross Tonnage | IMO | Call Sign | MMSI Number |
Wind Peak | WTG Installation Vessel | 150 | 34100 | 9957828 | OZVU2 | 219032994 |
IWS Seawalker | Service Operation Vessel | 90 | 6712 | 9968580 | LAVP8 | 257784000 |
FOB Swath 9 | Crew Transfer Vessel | 33 | 372 | 9920576 | OYKP2 | 219027989 |
FOB Swath 10 | Crew Transfer Vessel | 32 | 372 | 9920588 | OYMX2 |
219027988 |
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 Power” & Daughter craft “Rem Transporter” continues to support to the SOWF project throughout the construction of the offshore windfarm.
The Austri Enabler is expected to commence operations on or around 31st July 2025.
SOVs shall be transiting to / from the Sofia Array and the port of Blyth / Sunderland throughout this period.
Crew Transfer Vessel
The Crew Transfer Vessel (CTV) “MHO Balder” continues operations at the Sofia OWF.
The CTV “MHO Boreas” is expected to commence operations on or around 1st August 2025
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.
See detailed map on our bulletin website
The Cable Laying Vessel (CLV) “Boka Ocean” (replaced Calpyso - 10th June 2025) continues with Inter-Array Cable operations within the Sofia Offshore Windfarm Array. The exact finish date will be dependent on the prevailing weather conditions and work progress. The Crew Transfer Vessel (CTV) “Seazip 11” is expected to commence operations on or around 31st July 2025 supporting VOOM Punch Campaign Works.
The Subsea Viking continues supporting the Inter Array Cable Installation works via Survey, Cable Burial, Rock Bag Installation Works, as required.
Service Operation Vessels
The Service Operations Vessel (SOV) “Rem Power” & Daughter craft “Rem Transporter”, Acta Centaurus (W2W) continues to support to the SOWF project throughout the construction of the offshore windfarm.
SOVs Dos Notus (W2W), Acta Orion and Olympic Orion continue to support Inter Array Cable / prepping and termination works.
The Austri Enabler is expected to commence operations on or around 31st July 2025.
All vessels can be contacted on VHF 16 for further information as required reference proximity / nearby operations etc.
Vessels shall be transiting to / from the Sofia Array and the ports of Blyth & Sunderland throughout this period.
Crew Transfer Vessel
The Crew Transfer Vessel (CTV) “MHO Balder” continues operations at the Sofia OWF.
The CTV “MHO Boreas” is expected to commence operations on or around 1st August 2025
Mariners are requested to remain where possible 500m from these vessels, as they will have restricted manoeuvrability and shall also be exhibiting the correct day shapes/ lights.
See detailed map on our bulletin websiteAll mariners are advised that nearshore export cable civils works will commence at the Inch Cape export cable landfall site today, 12th June. The tender Torc will proceed to the work site and deploy two demarcation buoys. The barge Cliodna will be towed from Leith to Cockenzie on Sunday or Monday.
The works will consist of the excavation of 2 cable trenches and the installation of 2 stainless steel export cable ducts, once the ducts are installed the trenches shall be backfilled. Two buoys shall be temporarily deployred to delineate the work site. These works shall include diving operations, please see attached Notice to Mariners for further information.
See detailed map on our bulletin websiteThe Wind Turbine Installation Vessel 'Aeolus' continued and completed the Foundation Installation Works within the array site. The Aeolus and the Noise Abatement (Big Bubble Curtain) Vessel “SAR Odin” have both departed site.
The following table highlights foundation installation progress and next 7 day forecast.
Total Foundations Installed (100 in Total) |
Foundations Installed Last 7 Days / (Date Fully Installed) | Foundation Installation Next 7 Day Forecast |
100 | T15, R15, Q15 - Final Trip | Vessel complete at Sofia Offshore Wind Farm. |
The Sofia Offshore Wind Farm Exclusion Zone coordinates, are shown below and included within the relevant NtM. Mariners are requested to remain outside this Exclusion Zone.
Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain outside of the areas identified.
Service Operation Vessels
The Service Operations Vessels (SOV) “Rem Power” & Daughter craft “Rem Transporter”, Acta Centaurus (W2W) and Dos Notus W2W) continues to support to the SOWF project throughout the construction of the offshore windfarm.
SOVs shall be transiting to / from the Sofia Array and the port of Blyth / Sunderland throughout this period.
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 restricted in ability to manoeuvre.
Crew Transfer Vessel
The Crew Transfer Vessel (CTV) “MHO Balder” continues operations at the Sofia OWF.
All vessels can be contacted on VHF 16 for further information as required reference proximity / nearby operations etc.
See detailed map on our bulletin websitePlease be advised Galloper Windfarm will be carrying out a bathymetric survey campaign as part of our planned maintenance and inspection programme. The campaign will be using the Njord Survey Vessel, M/V Northern Storm, across both the North and South Fields. The vessel will be operating during daytime only, commencing 30th June 2025 for approximately 10 days – weather dependent.
An Exclusion zone of 500 metres will be required around the vessel whilst the work scope is underway. Vessel : M/V Northern Storm Call Sign: MISA7
See detailed map on our bulletin websiteThe ERDA Jackup Barge will undertake hydrocarbon safe (HCS) and well plug and abandonment (P&A) works at the Kilmar installation. The ERDA will be located within the 500m exclusion zone. The ERDA will be at Kilmar from 24July 2025 to 15 September 2025.
The ERDA Jackup Barge will undertake hydrocarbon safe (HCS) and well plug and abandonment (P&A) works at the Kilmar installation. The ERDA will be located within the 500m exclusion zone.
The ERDA will be at Kilmar from 24July 2025 to 15 September 2025.
The HAEVA Jackup Barge will undertake well plug and abandonment (P&A) works and the removal of the Wellhead Protection Structure (WHPS) at the Davy East subsea wells. The HAEVA will at Davy East from 28 July 2025 to 1 September 2025.
The HAEVA Jackup Barge will undertake well plug and abandonment (P&A) works and the removal of the Wellhead Protection Structure (WHPS) at the Davy East subsea wells. The HAEVA will at Davy East from 28 July 2025 to 1 September 2025.
See detailed map on our bulletin websiteThe OBANA Heavy Lift Vessel will undertake topside and monopod removal activities at the Galahad installation. The OBANA will be located within the Galahad 500m exclusion zone.
The OBANA Heavy Lift Vessel will undertake topside and monopod removal activities at the Galahad installation. The OBANA will be located within the Galahad 500m exclusion zone.
See detailed map on our bulletin websiteNEXANS on behalf of SSEN will be undertaking Geophysical Survey as part of the Orkney HVAC Project - between Warbeth, Orkney and Dounreay, Caithness.
The Geophysical UXO survey will take place on or around 15th July – 15th August from vessel MV Ivero. The vessel will be operating Scotland and Orkney mainland, outside of main shipping channels.
Ivero will be RESTRICTED in ability to manoeuvre operating towed survey sensors. Vessel will display RAMs day shapes and appropriate signals informing other vessels in the vicinity. During periods of poor weather, Ivero will port call in Scrabster in times when the vessel cannot remain at sea.
The vessel will be listening on VHF Channels 12 and 16 for direct contact.
See detailed map on our bulletin websiteThe Vessel Armada 78 will be carrying Inspection Operations (Wells, Subsea Structures & Pipelines) in the vicinity of and between the locations noted below: Dates = 6th August to 4th October 2025 (Approx 60 Days)
The Vessel Armada 78 will be carrying Inspection Operations (Wells, Subsea Structures & Pipelines) in the vicinity of and between the locations noted below:
Dates = 6th August to 4th October 2025 (Approx 60 Days)
See detailed map on our bulletin websiteThe Vessel Skandi Hera (Call Sign LAPT) will be carrying out Inspection. Repair & Maintenance (IRM) Operations in the vicinity of the locations noted below: Dates = 31st July 2025 to 8th August 2025 (Approx 9 Days)
The Vessel Skandi Hera (Call Sign LAPT) will be carrying out Inspection. Repair & Maintenance (IRM) Operations in the vicinity of the locations noted below:
Dates = 31st July 2025 to 8th August 2025 (Approx 9 Days)
See detailed map on our bulletin websiteThe Vessel Island Ocean (Call Sign LNJM3) will be carrying out inspection and make safe operations in the vicinity of the locations noted below: Dates: 22nd July to 29th July 2025 (Approx 7 Days)
The Vessel Island Ocean (Call Sign LNJM3) will be carrying out inspection and make safe operations in the vicinity of the locations noted below:
Dates: 22nd July to 29th July 2025 (Approx 7 Days)
See detailed map on our bulletin websiteOffshore Construction of the Dogger Bank B Offshore Wind Farm commenced on the 21st of April 2023 with the installation of the OSP jacket foundation. This notice will be updated weekly, giving information on the progress and resources involved in the offshore project. The intention is to give an overview of activities and vessels involved. Should anyone have questions regarding the operations, we kindly ask you to put them forward well in advance.
Inter Array Cable Installation
The Cable Lay Vessel (CLV) VIKING NEPTUN will perform the remaining inter array cable installation works with the commencement around 18th of July 2025. The vessel will further be assisted by the Service Operation Vessel (SOV) NORSIDE CETUS for the deployment of cable pull in teams. All works will be continuous, 24 hours a day. The cable lay vessel will deploy the inter array cable onto the seabed through her dedicated deck spread. The cable will remain exposed on the seabed until trenching operations commence in August/September 2025. During operations, the VIKING NEPTUN and NORSIDE CETUS 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
Offshore Substation Platform
The Service Operations Vessel (SOV) Grampian Tweed will carry out an annual maintenance programme at the DBB Offshore Substation Platform (OSP)
See detailed map on our bulletin websitePlease find attached an updated Notice to Mariners (NtM_EGL2_4.7.2). The purpose of this (NtM) is to outline the working area for the survey vessels, as well as the scope of work.
Geotechnical Drilling (boreholes) survey using a jack up barge and support vessels to evaluate underlying geology. The support vessels will be providing crew change and pushing services to the Shearwater Jack Up Barge
From 25/07/25 – 12/08/25
See detailed map on our bulletin websiteGlobal Marine are currently conducting final burial operations on the Q&E North telecommunications cable from Joss Bay, UK to Ostend, Belgium. The remaining operations are focussed around the following coordinates within Belgian waters, 51° 21.0462' N, 2° 44.1482' E and 51°19.0035N, 2°46.4372E. These operations are expected to be completed by the end of July 2025. Timings are dependent upon weather and other operational conditions. Further details can be found in the attached NtM.
The vessels will be limited in manoeuvrability therefore, vessels working in the area should proceed with caution and alert the vessel within 1NM from the cable ship during operations and all activity should remain clear 250m either side of the vessel, 500m corridor in total.
For a further breakdown of operations, please don't hesitate to get in touch.
See detailed map on our bulletin websiteThe offshore site survey of the proposed Morgan (Generation Assets) and Mona Offshore Wind Projects array areas, to be carried out by the Ocean Observer.
The Ocean Observer is due to commence Geotechnical survey activities in the proposed Mona Offshore Wind Projects array area from 24th July onwards.
The vessel is continuing to carry out Geotechnical survey activities in the Morgan (Generation Assets) proposed array area currently and is estimated to transit to the Mona licence area to start Geotechnical survey activities from 24th July 2025. The Geotechnical survey activities undertaken by the Ocean Observer are estimated to be completed by 31st September 2025.
The survey involves shallow geotechnical surveys using Cone Penetration Testing (CPT) and Vibrocores (VC).
Regular lookaheads of the vessel position will be provide by the project FIR.
The project Fishing Industry Representative (FIR) and/or Company FLO (CLFO) can be contacted with any specific queries. Contact details for the FIR and CFLO are provided in the attached notice.
See detailed map on our bulletin websiteSampling by scallop dredge, 2 m beam trawl or towed camera sledge at selected locations around the Welsh Coast from the RV Prince Madog 23rd-30th July 2025.
Sampling by scallop dredge, 2 m beam trawl or towed camera sledge at selected locations around the Welsh Coast from the RV Prince Madog 23rd-30th July 2025 as part of the Welsh Scallop Survey 2025. See contact details or contact the RV Prince Madog over VHF if you aware of static gear snagging risks in these locations during the survey. Checks will be made for marked static gear before towed gear is deployed during the survey.
Towed gear sampling locations:
Irish Sea | Caernarfon Bay |
53°32.835'N 003°44.477'W 53°36.732'N 004°03.755'W 53°29.329'N 003°41.076'W 53°38.101'N 004°03.317'W 53°29.865'N 003°52.736'W 53°29.187'N 004°01.737'W 53°32.884'N 003°37.311'W 53°25.223'N 003°53.933'W 53°33.811'N 003°47.914'W 53°33.435'N 004°09.468'W |
52°41.631'N 004°55.128'W 52°59.259'N 004°52.862'W 52°55.856'N 004°58.309'W 52°53.058'N 004°55.268'W 52°54.696'N 004°57.274'W 52°58.211'N 004°35.234'W 53°00.075'N 004°43.025'W 53°06.792'N 004°46.276'W 52°58.163'N 004°48.829'W 53°02.644'N 004°49.184'W |
Cardigan Bay | ||
52°08.581'N 004°51.542'W 52°10.943'N 004°52.850'W 52°18.938'N 004°34.358'W 52°22.100'N 004°21.819'W 52°21.746'N 004°33.367'W 52°10.201'N 004°54.007'W 52°20.464'N 004°34.301'W 52°14.587'N 004°53.653'W 52°18.098'N 004°31.513'W 52°10.244'N 004°48.766'W 52°21.124'N 004°30.945'W 52°14.203'N 004°51.371'W 52°20.798'N 004°22.743'W 52°20.528'N 004°32.749'W 52°14.420'N 004°47.748'W 52°12.692'N 004°49.115'W 52°15.867'N 004°48.726'W 52°14.795'N 004°50.019'W 52°15.048'N 004°44.630'W 52°11.401'N 004°48.154'W 52°15.954'N 004°45.080'W 52°13.357'N 004°43.077'W 52°09.557'N 004°46.474'W 52°10.626'N 004°45.934'W 52°13.124'N 004°46.514'W 52°12.728'N 004°45.029'W 52°11.330'N 004°45.933'W 52°12.111'N 004°44.365'W 52°13.954'N 004°34.859'W 52°12.670'N 004°52.517'W 52°11.540'N 004°54.801'W 52°11.647'N 004°50.477'W 52°12.747'N 004°56.005'W 52°36.438'N 004°59.558'W 52°35.261'N 004°53.259'W 52°26.665'N 004°56.085'W 52°37.506'N 004°59.221'W 52°38.259'N 004°22.561'W |
52°21.659'N 004°09.997'W 52°21.462'N 004°10.172'W 52°03.934'N 004°54.877'W 52°09.453'N 004°53.552'W 52°12.206'N 004°34.952'W 52°18.238'N 004°31.734'W 52°18.378'N 004°27.029'W 52°10.251'N 004°30.510'W 52°11.648'N 004°55.106'W 52°20.860'N 004°25.915'W 52°12.021'N 004°50.414'W 52°11.740'N 004°29.872'W 52°10.655'N 004°31.269'W 52°12.233'N 004°32.511'W 52°17.730'N 004°24.368'W 52°18.592'N 004°33.295'W 52°19.508'N 004°26.496'W 52°13.991'N 004°52.872'W 52°14.385'N 004°54.946'W 52°21.598'N 004°26.005'W 52°15.075'N 004°24.755'W 52°12.215'N 004°35.132'W 52°17.690'N 004°31.465'W 52°10.284'N 004°54.842'W 52°10.117'N 004°54.609'W 52°14.427'N 004°33.993'W 52°09.400'N 004°43.172'W 52°16.477'N 004°18.810'W 52°30.784'N 004°26.134'W 52°27.901'N 004°43.231'W 52°39.134'N 004°30.496'W 52°25.250'N 004°26.985'W 52°38.810'N 004°35.642'W 52°30.204'N 004°43.276'W 52°21.717'N 004°36.752'W 52°34.598'N 004°31.343'W 52°37.171'N 004°34.161'W 52°35.206'N 004°34.857'W |
52°22.162'N 004°49.343'W 52°36.649'N 004°33.305'W 52°21.096'N 004°51.107'W 52°32.011'N 004°34.682'W 52°36.273'N 004°25.001'W 52°23.402'N 004°31.376'W 52°26.808'N 004°24.979'W 52°31.980'N 004°26.517'W 52°28.891'N 004°45.214'W 52°30.261'N 004°34.595'W 52°25.714'N 004°40.861'W 52°24.655'N 004°39.903'W 52°14.408'N 004°50.225'W 52°10.513'N 004°46.328'W 52°12.082'N 004°48.481'W 52°17.124'N 004°46.589'W 52°15.847'N 004°46.778'W 52°11.612'N 004°44.775'W 52°14.765'N 004°45.961'W 52°14.672'N 004°44.414'W 52°16.363'N 004°49.026'W 52°14.889'N 004°46.209'W 52°12.853'N 004°47.677'W 52°14.986'N 004°51.179'W 52°14.592'N 004°51.647'W 52°12.700'N 004°48.384'W 52°16.018'N 004°50.308'W 52°09.849'N 004°45.757'W 52°12.578'N 004°48.645'W 52°14.966'N 004°39.995'W 52°17.627'N 004°38.788'W 52°16.962'N 004°38.652'W 52°18.064'N 004°39.852'W 52°12.093'N 004°40.004'W 52°18.571'N 004°42.576'W 52°15.631'N 004°44.354'W 52°16.023'N 004°44.370'W |
Harbour Energy are scheduled to complete P&A operations (Using the Dolphin Paul B Lloyd Junior – Semi Submersible) at Nicol 15/25a-N2U and then the rig will move to the shipyard in Olen, Norway. The move is currently planned for 24/07/25.
Harbour Energy are scheduled to complete P&A operations (Using the Dolphin Paul B Lloyd Junior – Semi Submersible) at Nicol 15/25a-N2U and then the rig will move to the shipyard in Olen, Norway. The move is currently planned for 24/07/25.
See detailed map on our bulletin websiteA geophysical survey is due to commence within the MachairWind Offshore Windfarm area. This survey will be undertaken by Sulmara from the Port of Larne with an earliest commencement date of the 15th April 2025 and expected completion date of the end of July 2025, weather dependent. The MV Mainport Edge (Call Sign: V7A7352) will be used and will deploy towed, hull-mounted equipment, and drop-down cameras. Mariners are requested to maintain a distance of 500 metres from the survey vessel.
The geophysical survey will be undertaken within the Survey Area, with a 1.5 km buffer around it to allow the survey vessel to turn between survey lines (please refer to the map in the ‘Activity Area’ section below which displays both the Survey Area and 1.5 km buffer).
The MV Mainport Edge will use a range of acoustic and sonar sensors to investigate the seafloor and sub-surface, these will either be attached to the hull of the survey vessel or towed by the survey vessel for the duration of the geophysical survey.
The MV Mainport Edge will transmit regular automatic transmission system messages during the geophysical survey.
See detailed map on our bulletin websitePlease be advised that on behalf of Perenco UK Ltd, Fugro is planning to conduct a MBES and CP survey at 2 locations, Dimlington and Bacton. Perenco requires an inspection of pipelines and adjacent seabed in the nearshore approaches (up to the 10m contour line) of both sites. The non-intrusive survey works shall provide seabed bathymetry and cathartic protection reading along pipelines across the 2 sites.
The survey will involve the full coverage of dedicated survey lines with a suite of survey systems, multibeam echo sounder (hull mounted), and the CP trailing wire survey which will involve thin wires connected to test poles as Bacton and Dimlington and the vessel, Fugro Valkyrie.
Other vessels should maintain an appropriate and safe distance of 500m when passing the survey vessels whilst undertaking survey operations and should pass at the lowest speed to avoid vessel wash effects. Vessels should not pass between the Fugro Valkyrie and the shore during the CP survey. Fugro Valkyrie will be surveying out until the 10m contour line.
The Fugro Valkyrie will be working on 12-hour basis focused around daylight and appropriate tides for nearshore operations. Please note that the dates will be dependent on the prevailing weather conditions and work progress. A continuous listening watch will be conducted on VHF Channel 16.
See detailed map on our bulletin websiteDebris surveys centred around the Leman 27A (49/27), Leman 27J (49/27), Trent (43/24), Ravenspurn North GCD (43/26), Indefatigable 18A (49/18) and Hoton (48/07) platforms. The surveys will utilise a combination of bathymetric Multibeam Echosounder (MBES), Side Scan Sonar (SSS) and magnetometer.
Debris surveys centred around the Leman 27A (49/27), Leman 27J (49/27), Trent (43/24), Ravenspurn North GCD (43/26), Indefatigable 18A (49/18) and Hoton (48/07) platforms. The surveys will utilise a combination of bathymetric Multibeam Echosounder (MBES), Side Scan Sonar (SSS) and magnetometer.
See detailed map on our bulletin websiteMBES Site Survey Operation - Warebeth.
Site Survey operation.
Orkney VTS will be notified of all operations and movements.
Vessel will be transiting from Stromness harbour to the survey area and back to harbour.
Vessels are requested to maintain a safe distance of 400 meters from the stated coordinates submitted.
See detailed map on our bulletin websiteThe Jackdaw field is an ultra-high pressure/high temperature (uHPHT) reservoir that will be developed with a not permanently attended Wellhead Platform (WHP). Four wells will be drilled at the Jackdaw WHP. The export system consists of a subsea pipeline to the Shearwater platform. Vessels for 2025/2026: Deep Arctic or Deep Discoverer, Sleipnir, Seven Kestrel .
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.
See detailed map on our bulletin websiteThe geophysical nearshore survey for the Northern Endurance Partnership (NEP) (bp) is scheduled to mobilise on 23rd of July 2025 and is expected to last for approximately 25 days (16th August 2025) The Elysse will carry out these activities.
The survey will utilise Multibeam Echosounder (MBES), Sidescan Sonar (SSS), Sub Bottom Profiler (SBP) and Magnetometer equipment, some of which will be towed up to 150 metres astern of the survey vessel.
The extent of the planned survey within the NEP Teesside Survey Area is shown in the attached. Coordinates of Teesside Survey Area also provided in Table 1. The Elysse will only survey areas <15m in water depth along the NEP survey area.
The Commercial Fisheries Guard Vessel Sorrento (detailed in section 6 of the attached) will scout and guard the nearshore area during the survey.
Contact details for the Fishing Industry Representative and Company Fisheries Liaison Officer are provided
See detailed map on our bulletin websiteThe geophysical and geotechnical survey for the Northern Endurance Partnership (NEP) (bp) is scheduled to commence on 23rd of July 2025 and is expected to last for approximately 36 days (28th August 2025), allowing for potential delays due to adverse weather conditions.
The geophysical scope includes Multibeam Echosounder (MBES), Sidescan Sonar (SSS), Sub Bottom Profiler (SBP) and Magnetometer equipment, some of which will be towed up to 150 metres astern of the survey vessel. The geotechnical scope includes Cone Penetration Testing (CPT), Vibrocore and Rock Core activities.
The extent of the planned survey within the NEP Teesside Survey Area is shown in Figure 1. Coordinates of Teesside Survey Area also provided in Table 1. The Braveheart Spirit will only survey areas >15m in water depth along the NEP survey area.
An NFFO Offshore Fisheries Liaison Officer (OFLO) will be onboard the vessel during the survey available on VHF Channel 16. The Commercial Fisheries Guard Vessel Sorrento (detailed in the attached notice) will scout and guard the area during the surveys.â¯â¯â¯â¯
Contact details for the Fishing Industry Representative and Company Fisheries Liaison Officer are provided in Section 7 of the attached notice.
See detailed map on our bulletin websiteThe Spiorad na Mara Floating LiDAR has been serviced and returned to its original position
The Spiorad na Mara Floating LiDAR (FLiDAR) was successfully serviced and returned to its original position.
Positions of the FLiDAR is illustrated in Figure 1 and coordinates listed in Table 1 of the attached notice.
The remaining FLiDAR is scheduled for removal in March 2026, inclusive of any delays due to adverse weather conditions. An accurate removal date, along with vessel details for the operation, will be provided in due course.
See detailed map on our bulletin website
Global Marine have conducted the installation of the telecommunications cable from Newhaven UK to the French Territorial Waters boundary. All vessels associated with the project have left site.
The section from the French TW to the landing at Cayeux-sur-Mer will be installed at a later date, yet to be confirmed.
For a further breakdown of operations, please don't hesitate to get in touch.
See detailed map on our bulletin websiteLeask Marine working on behalf of SSEN as part of the Orkney HVAC Project will be undertaking a MBES survey off the coast of Warbeth, Orkney.
Leask Marine will be undertaking a MBES survey 0.23NM off-shore from Warbeth Beach, Orkney. Surveys will occur between 25/7/2025 and 05/08/2025.
The location of the survey area are detailed in the attached NTM. Vessels are requested to give the works a wide berth.
See detailed map on our bulletin websiteSurvey of new cable route - Douglas to onshore by Titan Discovery.
Survey of new cable route - Douglas to onshore by Titan Discovery.
See detailed map on our bulletin websiteArven Offshore Wind Farm will recover, service and re-deploy Passive Acoustic Monitoring (PAM) moorings in and around the Arven Offshore Wind Farm area to gather data on marine mammal activity.
Five moorings were deployed in September 2024 and then recovered, maintained and replaced in February and March 2025, as advised by previous Notices to Mariners. The moorings will now again be recovered, serviced and re-deployed in the same locations by the vessel Ruby May. The PAM moorings are each composed of an anchor weight, rope with acoustic release system and scientific PAM equipment suspended beneath a set of floats. The PAM moorings have no surface expression (i.e. no surface marker buoy) and the top of the mooring extends approximately 4 - 6 metres above the seabed.
Please see the attached NtM for more details of the mooring set up.
The planned locations to redeploy the moorings are the same as the previously issued NtM, although a subsequent NtM will be issued if the if the re-deployed locations of the PAM moorings differ from those shown in this NtM.
See detailed map on our bulletin websitePlease be advised that the anchors have been removed and the rope and chain have been buried.
Show MoreAll Mariners are advised that the Scotia and MJM Enterprise has commenced non-intrusive depth of burial survey within the Sofia Offshore Wind Farm Export Cable Corridor. This will commence nearshore and will continue out to the Sofia Offshore Array.
The works shall be carried out using Multi Beam Echo Sounder (MBES) and Remote Operated Vehicle (ROV) by three different vessels:
There shall be no interaction with the seabed during the works.
Fishing vessels are requested to pass at a safe speed and distance and remain outside of the exclusion area identified.
All vessels shall be monitoring VHF 16 during the scope of the works and shall also be exhibiting the correct day shapes and night lights as required to determine any restrictions in manoeuvrability. All vessels can be contacted on VHF 16 for further information as required reference proximity/nearby operations etc.
Previous Export Cable Route Construction Activities
Rock placement works 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.
An MBES survey of the HDD trenches out to KP 3 was performed indicating the spoil heaps from 2023 back hoe excavation works have largely naturally dispersed. One spoil heap remains with a maximum height above the seabed of < 0.2 m and vessels are requested to leave a wide berth as identified for the nearshore exclusion boundary (HDD pits out to KP3) until further notice.
The table below also provides the position and description of any equipment/asset/item that will remain in place following demobilisation of the Ievoli Ivory.
Location | Equipment and Description | Latitude | Longitude | Approximate Depth (LAT) |
A |
Concrete mattresses 3 of 5.95 m x 2.95 m x 0.30 m |
54°38.544’ N | 000°35.147’W | 55m |
B |
Concrete mattresses 1 of 5.95 m x 2.95 m x 0.30 m |
54°38.572’ N | 000°35.142’W | 55m |
C |
Concrete mattresses 2 of 5.95 m x 2.95 m x 0.30 m 1 of 5.55 m x 2.95 m x 0.50 m |
54°48.144’ N | 000°37.515’E | 74m |
See detailed map on our bulletin website
All Mariners are advised that a the Scotia commenced non-intrusive depth of burial survey is to take place within the Sofia Offshore Wind Farm Export Cable Corridor from the 12 Nautical Mile Limit out to the Sofia Offshore Array. Works are expected to last 5 days.
The works shall be carried out using Multi Beam Echo Sounder (MBES) and Remote Operated Vehicle (ROV).
There shall be no interaction with the seabed during the works.
Fishing vessels are requested to pass at a safe speed and distance and remain outside of the exclusion area identified.
All vessels shall be monitoring VHF 16 during the scope of the works and shall also be exhibiting the correct day shapes and night lights as required to determine any restrictions in manoeuvrability. All vessels can be contacted on VHF 16 for further information as required reference proximity/nearby operations etc.
Previous Export Cable Route Construction Activities
*The height of external cable protection is expected to be 2.06 m between KP 163 & 164 (DBB cable crossing).The water depth at the crossing is 23.24m following rock placement this will result in a minimum under keel clearance of 21.18m and a water depth reduction of 8.9%*
*The height of external cable protection is expected to be 2.06 m between KP 165 & KP 166 (SEAL pipeline crossing). The water depth at the crossing is 24.37m, following rock placement this will result in a minimum under keel clearance of 22.3m and a water depth reduction of 8.4%.*
Fishing vessels are requested to pass at a safe speed and distance and remain outside of the exclusion area identified.
The table below details the coordinates of project infrastructure to remain on the seabed following the Ievoli Cobalt’s completion of works. The mattresses are not expected to reduce navigable depth by over 5%.
Location | Equipment and Description | Latitude | Longitude | Approximate Depth (LAT) |
A |
Concrete mattresses 1 of 5.95 m x 2.95 m x 0.30 m |
54° 52.070520N | 001° 25.687020E | 23m |
B |
Concrete mattresses 2 of 5.95 m x 2.95 m x 0.30 m 1 of 5.55 m x 2.95 m x 0.50 m |
54° 51.943620N | 001° 27.690900E | 24m |
The Kingdom of Fife will commence service and inspection of the installed buoyage within the SOWF Array and within the Export Cable Route, as per the locations provided below circa 17th July 2025 for approx 14 days (weather permitting). In addition, the Met-ocean Buoys in position at KP8 & KP130 on the Export Cable Route will be permanently recovered. Mariners are requested to refrain from entering and transiting through the construction area as demarcated by these demarcation buoys.
The Kingdom of Fife shall be monitoring VHF 16 during the scope of the works and shall also be exhibiting the correct day shapes and night lights for a vessel restricted in ability to manoeuvre.
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.
Buoy | ID | Latitude | Longitude | Lantern Characteristics | Lantern Colour |
North Cardinal | N1 | 55° 08.133’ N | 002° 09.518' E |
VQ 0.5s |
White |
North Cardinal | N2 | 55° 08.436’ N | 002° 13.418’ E |
Q 1s |
White |
East Cardinal | E1 | 55° 06.480’ N | 002° 16.929’ E |
Q(3) 10s |
White |
East Cardinal | E2 | 55° 02.571’ N | 002° 23.925' E |
VQ(3) 5s |
White |
East Cardinal | E3 | 54° 59.043’ N | 002° 30.269’ E |
Q(3) 10s |
White |
East Cardinal | E4 | 54° 55.085’ N | 002° 26.631’ E |
VQ(3) 5s |
White |
East Cardinal | E5 | 54° 51.523’ N | 002° 20.709' E |
Q(3) 10s |
White |
South Cardinal | S1 | 54° 49.725’ N | 002° 16.726' E |
Q(6) + LFL 15s |
White |
West Cardinal | W1 | 54° 51.829’ N | 002° 12.194' E |
Q(9) 15s |
White |
West Cardinal | W2 | 54° 56.229’ N | 002° 03.867' E |
VQ(9) 10s |
White |
West Cardinal | W3 | 55° 00.623’ N | 001° 56.196' E |
Q(9) 15s |
White |
West Cardinal | W4 | 55° 04.648’ N | 002° 02.498' E |
VQ(9) 10s |
White |
Special Mark | SP1 | 55° 02.741’ N | 001° 59.265' E |
FI Y 5s |
Yellow |
Special Mark | SP2 | 55° 06.569’ N | 002° 05.756' E |
FI Y 5s |
Yellow |
Special Mark | SP3 | 55° 04.525’ N | 002° 20.428' E |
FI Y 5s |
Yellow |
Special Mark | SP4 | 55° 00.617’ N | 002° 27.418' E |
FI Y 5s |
Yellow |
Special Mark | SP5 | 54° 56.871’ N | 002° 29.602' E |
FI Y 5s |
Yellow |
Special Mark | SP6 | 54° 53.324’ N | 002° 23.621' E |
FI Y 5s |
Yellow |
Special Mark | SP7 | 54° 54.030’ N | 002° 08.026' E |
FI Y 5s |
Yellow |
Special Mark | SP8 | 54° 58.427’ N | 001° 59.703' E |
FI Y 5s |
Yellow |
The table below provides a summary of the Met-ocean Buoys deployed at the SOWF Array.
Site Location | Buoy Position | Latitude | Longitude | Deployment Date | Recovery Date |
Export Cable | KP8 | 54 36.584N | 000 54.674W | June 2023 | Will be recovered permanently |
Export Cable | KP130 | 54 50.543N | 000 54.689E | June 2023 | Will be recovered permanently |
SOWF | Array North | 55° 05.392' N | 002° 12.993' E | June 2023 | June 2026 |
SOWF | Array South | 54° 54.987' N | 002° 15.585' E | June 2023 | June 2026 |
SOWF | Array East | 54° 58.160' N | 002° 22.521' E | March 2024 | June 2026 |
SOWF | Array West | 55° 01.528' N | 002° 04.052' E | March 2024 | June 2026 |
SOWF | OCP | 55° 00.439' N | 002° 14.798' E | March 2024 | June 2026 |
See detailed map on our bulletin website
Brent Charlie attic oil recovery operations from the concrete gravity based structure.
In 2025 Shell plan to undertake Attic Oil Recovery (AOR) at Brent Charlie. The planned operations will be undertaken in a split campaign with two phases, phase 1a and 1b. Campaign 1a covers cell access and fluid characterisation and campaign 1b covers the recovery of cell fluids.
See detailed map on our bulletin websiteAll instrumentation will be demobilised from the offshore site no earlier than 17th July, subject to weather. Operations will be carried out from Fraserburgh Harbour by the vessel BB Ocean. ALL VESSELS ARE REQUESTED to give the vessel engaged in the replacement activity a wide berth. Towed equipment may be up to 100m astern of the vessel. MARINERS ARE REMINDED to navigate with caution and keep continued watch on VHF Ch. 70 / 16 when navigating the area.
Metocean instrumentation and a floating LiDAR system (FLS) have been deployed by Green Rebel within the boundary of the proposed Muir Mhòr Offshore Wind Farm Project site in the North Sea since February 2023.
See attached NTM.
See detailed map on our bulletin websiteDiving Support Vessel (DSV) 'Seven Atlantic' will be performing Inspection, Repair and Maintenance (IRM) activities at Kraken field.
Diving Support Vessel (DSV) 'Seven Atlantic' will be performing Inspection, Repair and Maintenance (IRM) activities at Kraken field.
See detailed map on our bulletin websiteDiving Support Vessel (DSV) 'Seven Atlantic' will be performing Inspection, Repair and Maintenance (IRM) and decommissioning activities at the Thistle platform.
Diving Support Vessel (DSV) 'Seven Atlantic' will be performing Inspection, Repair and Maintenance (IRM) and decommissioning activities at the Thistle platform.
See detailed map on our bulletin websiteThis notice is to inform that Green Rebel intends to deployed (1) Floating LiDAR System (FLS) buoy at the OREC National Offshore Anemometry Hub (NOAH), approximately 3 nautical miles off the coast of Blyth, Northumberland for a minimum period of 3-months. The installation of the FLS buoy and associated single leg mooring system will aim to take place on Friday 25th July 2025. Additional notice will be provided prior to recovery, or any other offshore activities being undertaken.
This notice is to inform that Green Rebel intends to deployed (1) Floating LiDAR System (FLS) buoy at the OREC National Offshore Anemometry Hub (NOAH), approximately 3 nautical miles off the coast of Blyth, Northumberland for a minimum period of 3-months.
The installation of the FLS buoy and associated single leg mooring system will aim to take place on Friday 25th July 2025. Additional notice will be provided prior to recovery, or any other offshore activities being undertaken.
The EGL 5 marine survey works are being carried out by ‘GEOxyz’ with the vessel Provider. The survey will include a Triton XLX Work class Remotely Operated Vehicle (WROV). The survey will be carried out at specific locations where existing cables and pipelines are situated on the route as per table 1 below. The marine survey activities for EGL 5 will commence from 23 July 2025. The survey is due to be completed in approximately 20 days, subject to weather
Mariners are advised about Marine Survey Works for the Eastern Green Link 5 Project. The EGL 5 project will play a vital role in achieving the UK and Scottish Government’s net zero targets and significantly increase the UK’s capacity for clean, green renewable power. The project comprises a 2GW, 525kV High Voltage Direct Current (HVDC) connection between an offshore Scottish and Southern Electricity Networks – (SSEN) Transmission’s licensed area to the National Grid Electricity Transmission (NGET) Lincolnshire Connection Node, comprising ~585km of HVDC cable offshore, ~10km HVDC cable onshore and a HVDC converter station.
Survey Information The EGL 5 marine survey works are being carried out by ‘GEOxyz’ with the vessel Provider. The survey will include a Triton XLX Work class Remotely Operated Vehicle (WROV). The survey will be carried out at specific locations where existing cables and pipelines are situated on the route as per table 1 below. The marine survey activities for EGL 5 will commence from 23 July 2025. The survey is due to be completed in approximately 20 days, subject to weather. The area of work, pertaining to this Notice to Mariners (NtM) is illustrated in Figure 1 and Table 1, with the survey vessel details found in Table 2. Project Contact details and Fisheries Liaison Officers Contact details in Table 3. The survey vessel will be able to operate around static fishing gear. Therefore, fishing gear clearance is not being requested.
All vessels are requested to pass at a safe speed and distance, approximately 500 metres where possible (COLREGs Rule 16 & 18) from the areas identified during marine survey operations. The survey vessel will be restricted in her ability to manoeuvre. The survey vessels will monitor VHF Channel 16 at all times. Mobile contacts for the vessels are listed at the end of this NtM
See detailed map on our bulletin websiteAll mariners and stakeholders are advised that the Inch Cape development construction phase demarcation buoyage shall be deployed. Marine lighting and marking shall be deployed around the Inch Cape site boundary in line with industry requirements as detailed in the Inch Cape Lighting and Marking consent plan.
On behalf of Inch Cape Offshore Ltd, the Offshore Energy Group Ltd. shall deploy the development site construction phase demarcation buoyage in line with the project Lighting and Marking consent plan.
The multipurpose construction support vessel Kingdom of Fife will commence the buoy deployment on or around the 14th of July 2025.
See detailed map on our bulletin websiteOffshore Construction of the Dogger Bank C Offshore Wind Farm commenced on the 5th of October 2024. The development of the windfarm is made up of several elements - current ongoing elements are described below in the 'full notice' and in the attached file. This notice will be updated weekly, giving information on the progress and resources involved in the offshore project.
Monopile Installation
The Offshore installation vessel, HLV Seaway Strashnov, will install mono-pile foundations in the Dogger Bank C offshore windfarm construction area, commencing on the 22nd April 2025, continuing until approximately Q4 2025. The works will be continuous 24 hours a day.
The installed monopiles will be marked with temporary lighting with the following characteristics:
• Flashing (Fl) Yellow (Y) 2.5 seconds (s)
• IALA Availability Category 2 (not less than 99.0%)
• 360° visibility – up to two lights per structure may be used to achieve this
• At least 2 nm range.
During operations, the HLV Seaway Strashnov will be restricted in 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.
Transition Piece (TP) Installation
The installation vessel HLV Seaway Alfa Lift will install the foundation Transition Pieces (TP) on the pre-installed Monopiles (MP) in the Dogger Bank C offshore windfarm construction area, commencing on the 19th of May 2025, continuing until approximately Q4 2025. The works will be continuous 24 hours a day.
OSP Commissioning works
The Dogger Bank C Offshore Substation Platform (OSP) will undergo a Commissioning phase within the Dogger Bank C construction area. The Jack up Vessel (JUV) HEA Hydra will jack up and connect to the DBC OSP by a fixed gangway. The HEA Hydra will remain on site during the Commissioning phase, acting as the accommodation platform and OSP emergency evacuation vessel.
The works will commence on approximately the 15th of May 2025, continuing until approximately 11th of September 2025. The works will be continuous 24 hours a day. A chart of the DBC construction area and the installation location is provided below.
During operations, a Statutory Safety zone of 500m radius will be in place around the HEA Hydra for the duration of the Commissioning phase of the DBC OSP. Vessels are requested to maintain a minimum safe passing distance of 1km from the HEA Hydra during the operation.
The Platform Supply Vessel (PSV) FS Balmoral will support the HEA Hydra, carrying out regular supply runs to the offshore site.
During the Commissioning phase, there will be a requirement for rope access works to be carried out to the external parts of the OSP and Jacket. During these Over the Side (OTS) works the Dogger Bank OWF Guard vessel Jacobus will act as the Emergency Response Rescue Vessel (ERRV).
It is requested that all vessels maintain a minimum of 1.5Nm separation distance from the vessels and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.
Construction Support Activities.
The SOV Grampian Tees will carry out construction support activities at the Offshore Substation Platform in the DBC construction site and at various WTG locations.
See detailed map on our bulletin website
Mariners are advised that NKT will utilise Nine additional vessels to assist the ‘NKT VICTORIA’ during cable laying operations along the East Anglia THREE export cable corridor. ‘NKT Victoria’ will also deploy a further four work boats to provide support during cable installation through Simultaneous Laying and Burial (SLB). All marine traffic is advised to maintain a 1000m safety zone around ‘NKT Victoria’ during operations and pass at a reduced speed.
During operations, NKT Victoria will have restricted manoeuvrability as defined under COLREGs (International Regulations for Preventing Collisions at Sea, 1972). The vessel will display appropriate day shapes and lights and will transmit an Automatic Identification System (AIS) message.
There will be a total of nine vessels operating alongside the NKT Victoria:
VIPER - Call sign - 2EDS8 -MMSI - 235084238
CANBERRA - Call sign - 2EDS7 - MMSI - 235084237
TRISTAR - Call sign - 2FQW9 -MMSI - 235093497
TYPHOON - Call sign - 2DPX6 - MMSI - 235081064
DAKOTA - Call sign - 2FQW8 - MMSI - 235093496
CATALINA - Call sign - 2FQW6 - MMSI - 235093494
PHANTOM - Call sign - 2FBM3 - MMSI – 235089863
The Isle of Jura will assist with operations and is expected to remain onsite.
The Seafast don will conduct crew transfers from the Port of Harwich.
For further information regarding export cable installation assisting vessels, please see attached EA3 NTM 039-2025 Export Cable Installation (Assisting Vessels)
See detailed map on our bulletin website
NKT will carry out nearshore intervention works in support of the installation on the East Anglia Three Export Cable in the Export Cable Corridor in the vicinity of Bawdsey approximately 800 metres from shore. Locations for works are identified in section 2.1 of this document. Diving operations will be carried out onboard the vessel “Isle of Jura”, excavation operation will be carried out by the “Abeko Server 2”, and Survey works & Crew Change operations will be conducted by “Seafast Don”
Abeko Server 2 will be positioned at the HDD locations to begin seabed excavation for pit and trench creation and will carry out spoil management activities along the trench. The Abeko Server 2 will be manned 24 hours on site, with the Afon Alaw providing support for barge movements and towing as needed. During operations, the Abeko Server 2 will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. The Isle of Jura will deploy a four-point mooring spread, including chain clumps, ground and riser chains, mooring cans with yellow marker lights, and flashing sequences. An Alucat vessel will assist in connecting and disconnecting the Isle of Jura mooring lines to the mooring array.
For futher information please reffer attache EA3 NTM 042-2025 Export Cable Dredging (Nearshore
See detailed map on our bulletin websiteSouthern Electric Power Distribution (SEPD) ED2 SEPD Submarine Cables Inspection – Beaulieu River Date of issue: 20/06/2025. The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring.
Other vessels should maintain an appropriate and safe distance of 10 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects.
The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 68
See detailed map on our bulletin websiteOffshore Construction of the Dogger Bank A Offshore Wind Farm commenced on the 18th of March 2022. The development of the windfarm is made up of several elements - current ongoing elements are described below in the 'full notice' and in the attached file. This notice will be updated weekly, giving information on the progress and resources involved in the offshore project.
The development of the windfarm is made up of several elements - current ongoing elements include:
Construction Support Activities
The Offshore Construction Support Vessels Boreas Enabler, IWS Skywalker, IWS Starwalker, Grampian Derwent and Grampian Tyne will carry out construction support activities within Dogger Bank A construction site.
Wind Turbine Generator (WTG) Installation
The Jack-up WTG Installation Vessel, Voltaire, will install wind turbine generators (WTG) within the Dogger Bank A construction area. the Voltaire has completed scheduled maintenance and has returned to WTG Installation operations.
The works commenced on the 18th of July 2023, continuing until approximately Q4 2025. The works will be continuous, 24 hours a day. A running list of the completed WTG installations and the next locations to be installed is presented in the Installation progress table in the WNoO.
Inter Array Cable Replacement
The Cable Lay Vessel (CLV) VIKING NEPTUN will replace a single inter array cable in the DBA Construction Site. Works will commence on 12th of July 2025. The vessel will further be assisted by the Service Operation Vessel (SOV) NORSIDE CETUS for the deployment of cable pull in teams. All works will be continuous, 24 hours a day. Charts of the DBA array area are provided below.
The cable lay vessel will deploy the inter array cable onto the seabed through her dedicated deck spread. The cable will remain exposed on the seabed until trenching operations commence in August/September 2025.
During operations, the VIKING NEPTUN and NORSIDE CETUS 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.
See detailed map on our bulletin website
Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be installing a new subsea cable between Mull and Iona.
Removal of fishing gear from the Installation Corridor (Figure 1) is requested during the period 21st July-8 th August. Contact details for the FLO and FIR are provided at the end of this NtM.
During operations the vessels Blue Sky and Sarah Grey will be restricted in their ability to manoeuvre. Whilst operations will seek to minimise disruption on the width of the main navigation channel, some disruption may be unavoidable during operations within the working corridor.
Operations will be conducted over 24 hours and are weather/tide dependent.
Should any vessel wish to come within 500m of the vessels, then direct communication with the Master / Operator is required. Vessels will display the appropriate lights/day shapes for their operations.
See detailed map on our bulletin websiteRWE Renewables UK Wind Ltd at Rampion windfarm would like to inform mariners that, owing to trenching vessel availability, the essential works to replace a faulty cable within the Rampion OWF will require the new cable to be surface laid on the seabed until a trenching vessel will be available (currently expected end of August). The surface laid cable will be between turbine F04 and the Offshore Substation (OSS) along, or as close as practicable to, the existing cable route.
RWE Renewables UK Wind Ltd at Rampion windfarm would like to inform mariners that, owing to trenching vessel availability, the essential works to replace a faulty cable within the Rampion OWF will require the new cable to be surface laid on the seabed until a trenching vessel will be available (currently expected end of August).
The surface laid cable will be between turbine F04 and the Offshore Substation (OSS) along, or as close as practicable to, the existing cable route.
Owing to the safety and asset risks caused by accidental interactions with the surface laid cable, mariners are requested to be vigilant if approaching the below listed locations and to keep the area around the surface laid cable clear of any activities that may interact with the sea bed.
A guard vessel (M/V Theo) is expected to be on hand to support site in managing the risk and to inform other sea users in the area. This notice to mariners will be updated with the details of this vessel once secured and when the trenching availability window is clarified.
See detailed map on our bulletin websiteThe Cable Lay Vessel (CLV) Viking Neptune will complete the inter array cable installation works in the DBB construction site, with the commencement around 18th of July 2025.
The vessel will further be assisted by the Service Operation Vessel (SOV) NORSIDE CETUS for the deployment of cable pull in teams. All works will be continuous, 24 hours a day. Charts of the DBB array area are provided below.
The cable lay vessel will deploy the inter array cable onto the seabed through her dedicated deck spread. The cable will remain exposed on the seabed until trenching operations commence in August/September 2025.
During operations, the VIKING NEPTUN and NORSIDE CETUS will be restricted in their ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessels will also transmit an Automatic Identification System (AIS) message.
It is requested that all vessels maintain a minimum of 1.5Nm separation distance from the vessels and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.
See detailed map on our bulletin websiteThe Cable Lay Vessel (CLV) VIKING NEPTUN will replace a single inter array cable in the DBA Construction Site.
Works will commence on 12th of July 2025. The vessel will further be assisted by the Service Operation Vessel (SOV) NORSIDE CETUS for the deployment of cable pull in teams. All works will be continuous, 24 hours a day. Charts of the DBA array area are provided below.
The cable lay vessel will deploy the inter array cable onto the seabed through her dedicated deck spread. The cable will remain exposed on the seabed until trenching operations commence in August/September 2025.
During operations, the VIKING NEPTUN and NORSIDE CETUS will be restricted in their ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessels will also transmit an Automatic Identification System (AIS) message.
It is requested that all vessels maintain a minimum of 1.5Nm separation distance from the vessels and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.
See detailed map on our bulletin websiteThe Service Operations Vessel, (SOV) Edda Boreas, will carry out Balance of Plant (BoP) and Asset Preservation operations within Dogger Bank A construction site. The works will be performed in a single campaign, commencing on the 6th of November 2022 and continuing until approximately Q3 2025. The works will be continuous, 24 hours a day.
The operations will include visual inspections and maintenance at installed WTG foundation locations. During operations, the Edda Boreas 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 Offshore Supply Vessel and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working area.
See detailed map on our bulletin websiteA geophysical survey is due to be carried out from April 2025 over all marine aggregate dredging areas along the south coast. Surveys will also be carried out within and surrounding Kingmere Marine Conservation Zone, likely commencing in early-mid May.
The survey will be carried out by Gardline using the MV Titan Discovery or the MV Titan Endeavour. The survey will be collecting bathymetry data across each marine aggregate licence area along the south coast. The survey was originally planned to start in April 2025 but is now to start between July and September and last approximately 2 to 3 weeks subject to weather.
Bathymetry surveys will also be completed by MV Flatholm within and surrounding Kingmere MCZ for 1-2 days likely commencing in early to mid May extending in to July/August (all weather dependent).
See detailed map on our bulletin websiteA geophysical survey will be taking place in marine aggregate dredging area 393 in the southern Irish Sea using the vessel 'Marieanne'. The survey will be collecting bathymetry data and is likely to be carried out between July and September 2025 subject to weather.
A geophysical survey will be taking place in marine aggregate dredging area 393 in the southern Irish Sea using the vessel 'Marieanne'. The survey will be collecting bathymetry data and is likely to be carried out between July and September 2025 subject to weather.
See detailed map on our bulletin websitePlease be advised that Briggs Marine Contractors (on behalf of SHEPD) will be installing a new subsea cable between Mossbank and Yell.
Removal of fishing gear from the Installation Corridor (Figure 1) is requested during the period 1st August to 4 th September. Contact details for the FLO and FIR are provided at the end of this NtM.
During operations the vessels Blue Sky, C-Force, and Rock bag vessel will be restricted in their ability to manoeuvre. Whilst operations will seek to minimise disruption on the width of the main navigation channel, some disruption may be unavoidable during operations within the working corridor. Operations will be conducted over 24 hours and are weather/tide dependent.
Should any vessel wish to come within 500m of the vessels, then direct communication with the Master / Operator is required. Vessels will display the appropriate lights/day shapes for their operations.
See detailed map on our bulletin websiteMariners are advised about an ROV survey in blocks 2 and 3 of the cable route for the EGL2 project. The area of work pertaining to this NtM is illustrated in Figure 1 with the survey and support vessel description and contact details found in Tables 2 and 3.
The ROV Survey operations for EGL 2 are due to commence on 12th of July 2025. The works are to be conducted within the 2 blocks (2 & 3) shown in Figure 1, and updated coordinates are detailed in Table 1, both given below. The works consist of an offshore vessel using the Smartsearch system and ROV to carry out geophysical survey for the purposes of identifying potential unexploded ordnance. The work is estimated to take approximately 8-10 days, finishing on approximately the 22nd of July 2025, subject to weather. These works are being conducted in accordance with Marine Licence MS-00009943 from the Marine Directorate Scotland. The relevant enforcement and compliance team within the Licensing Operations Team (MD-LOT) is aware of the scheduled EGL2 survey activities.
See detailed map on our bulletin websiteTo inform the development of the Project, Mona Offshore Wind Limited intends to carry out a geotechnical investigation (survey) which is expected to commence in 2025, at the proposed Mona Landfall Survey Area (Figure 1). The geotechnical survey is expected to commence on the 17th July 2025, for an estimated total duration of 28 days.
To inform the development of the Project, Mona Offshore Wind Limited intends to carry out a geotechnical investigation (survey) which is expected to commence in 2025, at the proposed Mona Landfall Survey Area (Figure 1). The geotechnical survey is expected to commence on the 17th July 2025, for an estimated total duration of 28 days.
Please note that the licence for these works has not yet been granted and these works will not commence until the license is determined.
The survey is proposed consist of up to 12 geotechnical boreholes below Mean High Water Springs (MHWS) up to 40 m below seabed (licensable marine activity).
For information only, additional tests and survey work include:
The downhole in-situ testing works are non-licensable activities under the Marine and Coastal Access Act. Where necessary these activities will be the subject of the appropriate exemption notifications.
An Offshore Fisheries Liaison Officer (OFLO) will not be present on board the vessel during the survey but the project Fishing Industry Representative (FIR) and/or Company FLO (CLFO) can be contacted with any specific queries.
Contact details for the FIR and CFLO are provided in the attached notice.
See detailed map on our bulletin websiteRock placement on inter-array cables at two Offshore Substations (Z01) and wind turbine generator (E01).
The vessel "Rollingstone" will be placing rock on the inter-array cables at the two Offshore Substations at Walney 1 and 2 wind farms and wind turbine generator E03 between 19 - 27 July (subject to weather delays). A mandatory safety zone of 500m will be in place when the vessel is stationed next to the offshore infrastructure.
See detailed map on our bulletin websiteRoutine servicing of moored buoys around the North Sea at Warp and West Gabbard as part of the eutrophication monitoring programme. Exchange seabed lander at Warp and Dowsing. Exchange wave rider near West Gabbard. Seawater sampling via rosette deployments around southern north Sea region. 4 days in total.
1. Service SmartBuoy at West Gabbard 2. Service SmartBuoy at Warp 3. Service Noise Lander at Warp 4. Service Noise Lander at Dowsing 5. Service Waverider at West Gabbard 6. Continuous flow/underway water sampling as required on various transects via Ferrybox 7. CTD Rosette water sampling as required on various transects 8. Secchi disk deployment and Forel Ule sampling as required on various stations 9. Collection of zooplankton and phytoplankton sample at West Gabbard 10. Collection of zooplankton and phytoplankton sample Warp 11. Collection of zooplankton sample East of Warp
See detailed map on our bulletin websitePlease be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea surveys in the Outer Hebrides marine area. Please refer to Figure 1 that highlights the survey area. Surveys commenced 12th May 2025 and will continue until the end of August 2025.
Given the different conditions and water depths anticipated at each site, a range of vessels will be available for the project. Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations. All vessels will monitor VHF Channel 16 throughout survey operations.
Please see the attached NtM for more details.
See detailed map on our bulletin website
Mariners are advised that Transmission Capital Beatrice OFTO Ltd will be undertaking an export cable repair. Works will be carried out by NKT managed by Beatrice Offshore Winds Ltd – BOWL (acting as the principal contractor) using the dedicated cable lay vessel ‘North Sea Giant’ which is expected to arrive on site circa 5th July 2025 and remain on site until the 8th August. Work duration is expected to be approximately 4-6 weeks.
Mariners are advised that Transmission Capital Beatrice OFTO Ltd will be undertaking an export cable repair at approximately KP33 of CCT 2 (57.95900715 LAT, -3.04087088 LONG). Works will be carried out by NKT managed by Beatrice Offshore Winds Ltd – BOWL (acting as the principal contractor) using the dedicated cable lay vessel ‘North Sea Giant’ which is expected to arrive on site circa 5th July 2025 and remain on site until the 8th August.
Work duration is expected to be approximately 4-6 weeks.
A support vessel ‘Northern Victoria’ will be in site from 1st July and will transit between the work site and Aberdeen during the work period.
See detailed map on our bulletin websiteMariners are advised that the Trinity House Buoy Installation Vessel ‘Galatea’ has relocated and performed maintenance on 3 of the navigational buoys marking the boundary of the East Anglia THREE Offshore Windfarm.
THV Galatea has relocated the EA3 West 2 Buoy to its original position. EA3 Special 4 Buoy has been relocated East of its original position. THV Galatea has also performed maintenance on the EA3 East 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 041/2025: Aids To Navigation- Demarcation Buoys.
See detailed map on our bulletin websitePlease be advised that NKT will be deploying Guard Vessels along the East Anglia THREE Offshore Export Cable Corridor as detailed in Section 2.2 of the attached document for protection of the pre lay matrasses and to protect the cable bundle from the start of cable lay until the cable is adequately protected by means of trenching or rock placement.
The primary purpose of the guard vessels is to protect the exposed cable along the East Anglia 3 Export Cable corridor by monitoring and issuing warnings to marine traffic operating within 6Nm of the construction area with a Closest Point of Approach (CPA) < 1.5Nm. More specifically, the focus will be on those vessels with potential to be engaging in bottom contact activities such as fishing and anchoring, as these activities pose a risk not only to the exposed cable bundle but also to the vessels themselves. The guard vessels will be clearly marked and display a highly visible "GUARD" sign on each side. Exchange of vessels on site will ensure the relevant section of cable is never left unguarded. In sections where cable protection has been completed, guard vessels will be released, and sections will be opened up for fishing or use of other of equipment with seabed intervention. This may not necessarily be in a sequential order from shoreside outwards
See detailed map on our bulletin websiteThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreDuring a survey of the Decommissioning planning we have identified the presence of 49 concrete mattresses installed along the Cromarty pipeline. These mattresses are not located in 500m zones and were installed in 2003. The locations of the matt's are identified in the co-ordinates below, noting there are multiple matt's at some locations hence why there are 15 locations and 49 mattresses.
Show MoreDuring a survey of the Decommissioning planning we have identified the presence of 49 concrete mattresses installed along the Cromarty pipeline. These mattresses are not located in 500m zones and were installed in 2003. The locations of the matt's are identified in the co-ordinates below, noting there are multiple matt's at some locations hence why there are 15 locations and 49 mattresses.
Show MoreMariners are advised about survey works being undertaken for the Eastern Green link 1 project which is an HVDC electricity transmission interconnector between England and Scotland, a joint venture between National Grid and Scottish Power. The survey includes Geophysical Surveys followed by a geotechnical survey on fixed locations.
The works, managed by Prysmian, will be carried out by Sub-contractor NEXT from 12th May 2025 to Early October 2025, using the following vessels: - Ievoli Amber, UXO and Geophysical Survey Vessel. The Ievoli Amber will start from 12th of May 2025 in the English section of the corridor and then move North. - NG Driller, Geotechnical survey vessel. The NG Driller will start from beginning of June. Vessels and their contact details are given in Table 2 below. Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain at a safe distance, approximately 1000m from the areas identified. Survey works will be ongoing and during the works the vessel will have restricted maneuverability as it completes its work scope, which includes towing equipment behind the vessel. The Communication between the vessels will be through CH67 & 72. VHF CH 16 will be monitored at all times and will be used to contact the coastguard in the event of an emergency.
See detailed map on our bulletin websiteThe Multi-Purpose Offshore Vessel OLYMPIC TAURUS will be conducting a short campaign of works on WTGs within the Dogger Bank A (DBA) Array Area.
The works will commence on the 20th of July 2025, continuing until approximately the 20th of August 2025. The works will be continuous, 24 hours a day. A chart of the DBA Array Area is provided below.
During operations, the OLYMPIC TAURUS 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 OLYMPIC TAURUS and pass at reduced speed.
See detailed map on our bulletin websiteGeophysical survey and environmental/geotechnical sampling along the Mares Connect planned subsea cable route.
Geophysical Survey Operations:
The vessel will complete geophysical survey operations along the proposed Mares Connect subsea cable route, surveying a 500m corridor along the planned route in Irish waters. The vessel will be surveying using multibeam echosounder, side-scan sonar, magnetometer and sub-bottom profilers.
The side-sonar and magnetometer will be towed subsea at approximately 6m from the seabed, up to 4 times water depth (expected max tow 500m). One of the sub-bottom profilers will be towed behind the vessel with accompanying streamer at a distance of approximately 200-300m behind the vessel.
The closest point of approach to the vessel is 1000m due to towed equipment.
Environmental sampling operations:
The vessel will complete environmental sampling operations along the proposed Mares Connect subsea cable route, locations to be determined following the geophysical survey. This sampling would entail camera transects, grab sampling and CTD profiles.
The closest point of approach to the vessel is 500m due to overboarded equipment.
Geotechnical Sampling Operations:
The vessel will complete geotechnical sampling operations along the proposed Mares Connect subsea cable route, locations to be determined following the geophysical survey. This sampling would entail Vibrocore and CPT sampling.
The closest point of approach to the vessel is 500m due to overboarded equipment.
See detailed map on our bulletin websitePlease be advised that the vessel Ocean Observer has dropped equipment on the seabed which it is currently unable to recover during geotechnical survey operations within the Morgan Array Area.
Please be advised that the vessel Ocean Observer has dropped equipment on the seabed which it is currently unable to recover during geotechnical survey operations within the Morgan Array Area.
The height of the dropped equipment is approx. 7m and is located in mean average low water depth of 40m.
At this time the location of the dropped equipment on the seabed is marked by a tethered Norwegian buoy appended with the vessel Ocean Observers IMO number 8511275.
The contractor plans to recover the dropped equipment in the future, however at this point the date a time of recovery is not yet known.
See detailed map on our bulletin websiteGeotechnical Drilling (boreholes) survey using a jack up barge and support vessels to evaluate underlying geology to help inform the onward development of the Eastern Green Link 2 (EGL2) Project. The support vessels will be providing crew change and pushing services to the jack up barge.
Geotechnical Drilling (boreholes) survey using a jack up barge and support vessels to evaluate underlying geology to help inform the onward development of the Eastern Green Link 2 (EGL2) Project. The support vessels will be providing crew change and pushing services to the jack up barge.
See detailed map on our bulletin websiteMariners are advised that Orsted Hornsea Project Three (UK) Limited (hereafter ‘Orsted’) will be commencing seabed preparation works for Hornsea Project Three Offshore Wind Farm (‘Hornsea Three’), located within the UK Sector of the North Sea.
Boulder and Debris Relocation:
(Marine Licence: DCO/2016/00001)
Mariners are advised boulder and debris relocation operations will be undertaken along the eastern export cable route, western export cable route and interlink cable route by the vessel ‘Daniel Bernouilli’. Works have commenced and are estimated to be completed by mid-July 2025. Orsted requests all fishing gear is removed from the area of works shown in Figure 1.
Out of Service Cable Removal:
(Marine Licence: DCO/2016/00001)
Mariners are advised out of service (OOS) cable removal operations will be undertaken within the Hornsea Three array area. The works will be performed by the vessel ‘Voe Vanguard’ on 12 OOS cables along the eastern export cable route, western export cable route and interlink cable route. The works will commence from 10th July 2025 and the works are estimated to be complete by mid-July 2025. Orsted requests all fishing gear is removed from the area of works shown in Figure 1
Cable Installation Pre-lay Operations:
(Marine Licence: DCO/2016/00001)
Mariners are advised Trailing Suction Hopper Dredger (TSHD) works are planned along the Hornsea Three export cable route and interlink cable route. The vessels ‘Vitus Bering’ and ‘Pedro Alvares Cabral’ are currently on site and the works are estimated to be complete by the 31st August 2025. Orsted requests all fishing gear is removed from the area of works shown in Figure 1.
Wave Buoy recovery:
Mariners are advised that Hornsea Three will be commencing the recovery of the Fugro Oceanor Seawatch Midi wave buoy, deployed at the Hornsea Three export cable landfall location. In the same trip the vessel will also recover the Hornsea One and Hornsea Two wave buoys, all locations for recovery are show in Figure 2. The works will be conducted by the vessel “Boemmelbas” and expected to take 3 days from 15th to 25th July, depending on weather and vessel availability.
See detailed map on our bulletin websiteTo carry out a groundfish survey of the North Sea as part of the ICES coordinated IBTS, using a hybrid GOV trawl.
The survey aims to obtain information on: a) Distribution, size composition and abundance of all fish species caught. b) Age – length distribution of selected species. c) Distribution of fish in relation to their environment. d) Distribution of macrobenthos and anthropogenic debris. e) Surface and bottom temperature and salinity data using ESM2 profiler/mini-CTD logger and Niskin Bottle. f) Length weight & maturity information using individual fish measurements, in support of the EU Data Regulation.
To achieve this the Cefas Endeavour will deploy the GOV and trawl for 30 minutes at 4 knots (travelling approx 2nm) at each prime station. The positions given are the fishing locations that we used in 2024, however these may be altered to another location within the ICES rectangle if neccesary. Water sampling using the ESM2 profiler/mini-CTD logger and Niskin Bottle will occur twice each day.
The attached supporting information provides co-ordinates and a map for each prime station.
See detailed map on our bulletin websiteEnvironmental survey using Fugro Galaxy consisting of Hull mounted Multi-beam, towed Side Scan Sonar and magnetometer, environmental grabs and drop down camera. Centred on 16" GAS ATLANTIC MANIFOLD - ST. FERGUS pipeline (PL2029). Inshore end point is East of 1° 40' line.
Show MoreEnvironmental survey using Fugro Galaxy consisting of Hull mounted Multi-beam, towed Side Scan Sonar, environmental grabs and drop down camera. Surveys centred on pipelines plus 3x3km boxes around drill centres.
Show MorePlease be advised that from the Monday 7th July 2025 Ocean Ecology Ltd (OEL) will be undertaking Multibeam Bathymetry (MBES) Survey in the Bristol Channel (Figure 1 and Table 1).
The survey is part of the Regional Geophysical Monitoring Program (RGMP) which is applicable to the main aggregate dredging regions around the UK. The survey will be undertaken on behalf of Westminster Gravels Ltd (Llanelli Sand Dredging) to ensure the effects of extracting material from the seabed are in line with those predicted in the environmental statements. The survey will employ the use of an over-the-side pole mounted MBES and will not involve towed survey equipment. The work will be completed by OEL personnel on the vessel Seren Las. Full vessel details are presented in Table 2. This notification is intended for circulation to all interested parties undertaking or managing activities in the vicinity of the planned survey works. If you would like further details regarding the surveys, please contact the OEL Project Manager or Head of Survey using the contact details at the head of this communication.
See detailed map on our bulletin websiteSubsea well Plug and Abandonment operations at the Strathspey Satellite structure, using a Light Weight Intervention Vessel
Show MoreMariners are advised that NKT will conduct route clearance, inspection and mattress laying operations along the East Anglia Three export cable corridor utilising the vessel 'Trym'.
Route clearance of out of service cables, boulders and debris will be performed between KP4 -KP148 of the East Anglia Three Export Cable Route & within the boundary of the EA3 windfarm array. Inspection operations will be performed at third-party asset locations.
Mattress placement at third-party asset crossing locations will be performed at 7 locations between KP25 – KP42 of the EA3 Export cable route
A Pre-Lay Grapnel Run will be performed between KP4 – KP148
During periods of operation, vessel Trym will be restricted in her ability to manoeuvre. All vessels are requested to keep a minimum safe distance of 1000m from the vessel and pass at a reduced speed, fishers are requested not to deploy gear within the 500m fishing gear exclusion zone. For further information, please see attached East Anglia Three Notice To Mariners 030-2025.
See detailed map on our bulletin websiteMariners are advised that the Trinity House Buoy installation Vessel ‘Galatea’ will relocate and perform maintenance on the navigational buoys marking the boundary of the East Anglia Three Offshore Windfarm Array. All vessels are required to maintain a minimum of 500 metres safety distance from “THV Galatea” and navigate with caution at all times.
The confirmed relocation positions of EA3 Special 4 Buoy and EA3 West 2 Buoy will be notified via future Notice To Mariners. For further information regarding demarcation buoy relocation and maintenance, please see attached East Anglia THREE Notice To Mariner 038/2025: Aids to Navigation – Demarcation Buoy Relocation and Maintenance.
See detailed map on our bulletin websiteThis Notice is to inform that the Green Volt Offshore Windfarm Ltd serviced and relocated floating metocean devices within Green Volt Offshore Wind Farm between the 29th April and the 30th April 2025. Originally deployed in June 2024, the metocean devices will remain in place until June 2025 with options to extend (max. 24 months from June 2024) until June 2026.
Show MoreResearch Buoy Confirmation of Deployment Notification - Morlais Demonstration Zone.
Show MoreGreen Rebel, on behalf of Magnora Offshore Wind, has deployed a Floating LiDAR (FLS) System buoy and a Directional Wave Rider (DWR) buoy at the Talisk Offshore Wind site, approximately 30km north of the Isle of Lewis for a minimum period of 24 months. The deployment took place on 21 September 2024. Post deployment of the FLS and DWR, service activities be carried out onsite at approximately six-monthly intervals. Additional notice will be provided prior to service activities being undertaken.
Show MoreMariners are advised that pre-sweeping activities are ongoing along the NeuConnect cable route, carried out by Pre-Sweeping subcontractor Rohde Nielsen. Campaign will continue into the next section between approx. KP 199 and KP 264.
Show MoreCable lay operations will recommence with sea trials at KP 186 from the 07 July 2025, then retrieval of the cable end from the 11 July. Works will be undertaken by the Leonardo Da Vinci (LdV). The LdV will then continue cable installation by simultaneous lay and burial from KP 56 (51° 39.2’ N, 1° 25.0’ E).
Show MoreGeophysical and Environmental site survey with Fugro Galaxy utilising MBES, SSS, SBP, 2DHR, Drop Down camera and grab samples
Show MoreGeophysical and Environmental site survey with Fugro Galaxy utilising MBES, SSS, SBP, 2DHR, Drop Down camera and grab samples
Show MoreThe geophysical nearshore survey for the Northern Endurance Partnership (NEP) (bp) which commenced on 26 April 2025 is now expected to end ~ 31st July 2025. The survey will utilise Multibeam Echosounder (MBES), Sidescan Sonar (SSS), Sub Bottom Profiler (SBP) and Magnetometer equipment, some of which will be towed up to 150 metres astern of the survey vessel.
A simplified area is displayed within this Kingfisher Bulletin the full list of coordinates and extent of the planned survey within the NEP Teesside Cable Survey Area is shown in table 1 of attached notice. The EGS Echo will only survey areas >30m in water depth along the NEP cable survey area.
An NFFO Offshore Fisheries Liaison Officer (OFLO) will be onboard the vessel during the survey available on VHF Channel 16.
Contact details for the Fishing Industry Representative and Company Fisheries Liaison Officer are provided in attached.
See detailed map on our bulletin websiteThe Victory Project is to develop the Victory subsea gas field as a single well tie-back to the Shetland Gas Plant. This is to be achieved by drilling a new well and installing a pipeline to route hydrocarbons via an existing hot tap tee into the existing Greater Laggan Area (GLA) pipeline system to export via the Shetland Gas Plant. Well control will be provide via an umbilical pipeline route from Edradour manifold location to the Victory Well.
Note: the Victory wellsite is within an Offshore Development Area and as such, it is advised not to fish within an ODA because of potential construction activities.
Vessel Plan for 2025 *UPDATED*
Vessel Name |
Location |
Arrival |
Departure |
Activity |
Guard vessel 3 | Victory | 10/06/25 | 21/09/25 | Guard Pipeline at Victory |
Guard vessel 5 | Victory | 05/07/25 | 04/09/25 | Guard Umbilical at Edradour |
Deep Explorer | Victory | 01/07/25 | 8/07/25 | DSV Deep Explorer - Diverless work from Skandi Africa incl. Umbilical Pr e-Lay Survey & Flexible Pre-Lay Survey |
Skandi Africa | Victory | 05/08/25 | 02/09/25 | Flexible & Umbilical Installation |
Deep Arctic | Victory | 31/07/25 | 21/08/25 | Spool Install, Spool Tie-ins, Pre-Commissioning & Mattresses |
Guard vessel 4 | Victory | 11/08/25 | 22/09/25 | Guard Pipeline at H TT 1-2 |
Deep discoverer | Victory | 15/08/25 | 03/09/25 | Victory Hot Tap Execution & Protection Structure Install |
Deep discoverer | Victory | 04/09/25 | 16/09/25 | Hot Tap Tee Flexible Tie-In & Valve Configuration at Victory |
TBC |
Victory |
01/09/25 |
22/09/25 | Rock Campaign 4b (Post tie-ins / Flexible) |
Workscope has been cancelled. New date to be submitted. Project will disconnect the umbilicals PLU2784 and PLU2785 within the 500m exclusion zone at the Armada Platform, in preparation for removing the umbilical sections between safety zone and the UK-Norway median line. Vessel: Skandi Hera
Project will disconnect the umbilicals PLU2784 and PLU2785 within the 500m exclusion zone at the Armada Platform, in preparation for removing the umbilical sections between safety zone and the UK-Norway median line.
Vessel: Skandi Hera
See detailed map on our bulletin websiteInstallation of oil production flowline, gas lift pipeline and service umbilical.
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.
See detailed map on our bulletin websiteNotification of commencement of Bittern WI Pipeline replacement and tie in spool works as per the condition of the Consent to Locate permit.
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.
See detailed map on our bulletin websiteNotification of the commencement of the Bittern Valve Skid (BIVS)Works as per the condition of the Consent to Locate permit.
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.
See detailed map on our bulletin websiteActivities related to the development of the Triton Knoll wind farm continue, as detailed below. For background information visit: http://www.tritonknoll.co.uk.
NtM 002-2025 - Blade Inspections
Mariners are advised that on or around the 23rd April 2025 (weather depending), the Cardinal P will conduct a series of internal turbine inspections. During the blade inspections, the vessel will be tied off in close proximity to the Turbines being inspected (within the 50m zone).
This work will also involve external ROV inspection of 2 locations and will also be close proximity work to these locations (within the 50m zone) which is expected to start in June 2025 (dates to be confirmed.
NtM 003-2025 & NtM 004-2025 - Jack Up Operations
Mariners are advised that the Jack Up Vessel 'Wind Discovery' is expected to commence operations at the Triton Knoll OWF site conducting a series of construction activities. During these works there will be a 500m exclusion zone around each asset when worked upon. The Wind Discovery will be supported by the Arabella Jane.
This campaign will be completed in 2 phases as follows:
Phase 1: 28th April - 14th May 2025
Phase 2: 17th June – 30th June 2025
NtM 005-2025 - Drone Inspections
Mariners are advised that the Master P is expected to commence operations at the Triton Knoll OWF conducting Drone Inspections on all assets. Whilst drone inspections are being conducted, the Master P will be tied off near the asset and within the 50m zone.
NtM 007-2025 - Cable Protection System (CPS) Stabilisation Campaign The campaign will commence on 27th May 2025 for approximately 50 days (weather depending), including visits to port to reload.
Rock bags will be placed at intervals or adjacent to each other, as required, along selected exposed cable lengths at each of the fixed structure (WTG and OSP) locations across the site, taking approximately 6 hrs at each location. A 500m clearance to the vessel and all fixed structure locations whilst major maintenance works are being undertaken is required. The vessel will be operating 24/7.
NtM 008-2025 - Precision 1 MBES Survey
The vessel will be conducting Subsea survey using a hull mounted Multi-Beam Echo Sounder MBES (please note; no equipment will be towed behind the vessel). Please give a 500m clearance to the vessel and all fixed structure locations whilst she is working in this area.
Mariners are advised that the following vessels continue to be active at the Triton Knoll Offshore Wind Farm (TKOWF) as outlined within previously issued NtM's:
Vessel Name |
Type |
Call Sign |
MMSI |
IMO |
Operating Port |
Commence Date |
Windcat 11 | Crew Transfer Vessel | 2BIS9 | 235066459 | N/A | Grimsby | 14/12/2020 |
Esvagt Havelok | Service Operations Vessel | OYFR2 | 219026496 | 9878981 | Grimsby | 25/09/2021 |
Njord Amundsen | Support Vessel | ZDSO3 | 236112802 | 1036355 | Grimsby | 10/05/2024 |
Cardinal P | Support Vessel | 2FKK9 | 235092017 | - | Grimsby | 23/04/2025 |
Wind Discovery | Jack Up Vessel | OUHH2 | 219034268 | 9530096 | Grimsby | 28/04/2025 |
Arabella Jane | Support Vessel | MOYS2 | 232054276 | 1036707 | Grimsby | 28/04/2025 |
Master P | Support Vessel | 2HEO7 | 235103033 | - | Grimsby | 30/04/2025 |
Purus Chinook | Service Offshore Vessel | MPJQ7 | 232055578 | 1032701 | Hull | 11/05/2025 |
Ndeavor | Multi Purpose Vessel | 5BVG3 | 209852000 | 9650212 | Great Yarmouth | 27/05/2025 |
Precision 1 | Support Vessel | 2FCD2 | 235089165 | n/a | Grimsby | 25/06/2025 |
All vessels can be contacted via VHF channel 16 when operational in field.
Mariners are advised of works planned in and around the Triton Knoll Offshore Wind Farm in 2025 as referenced in NtM 001-2025, weather and work progress, vessel availability dependant.
*** Note ***
All 90 WTG's have now been fully installed, whilst WTG commissioning and service continues. All Export Cables are fully installed/buried and need to be deemed live/energised. All Inter Array Cables are fully installed and buried and need to be deemed live/energised. Whilst the main installation works have been completed, major construction commissioning works are continuing.
*** Note ***
Whilst TKOWFL is reopening the site to fishing from the 14th December 2021, TKOWFL kindly request that all fishermen intending to fish within the boundaries of the Triton Knoll wind farm, contact the Triton Knoll control room prior to entering and exiting the field, and inform them of their fishing intentions.
This precaution is requested to safeguard all vessels operational at the TKOWF site (including fishing vessels) and your cooperation, to ensure the safety of all parties is appreciated. The following contact details should be used when notifying the Triton Knoll control room of fishing activity:
Control Room Manager: Derek Whyte Radio: VHF channel 16 Callsign: TK MCC Phone: +44 1793 896250 Email: tkcr@rwe.com *** Note ***
Application of Triton Knoll Wind Farm Safety Zones During Construction The Secretary of State has granted the Application of Safety Zones on the Triton Knoll Wind Farm Project as follows:
|
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.
Description of Target | Latitude | Longitude |
Water Depth (LAT) Metres |
Required Exclusion Zone (Metres Radius) |
Archaeological - The item is thought to be an air-delivered bomb. It appears to be in a stable condition and is resting on the seabed. Marine growth and concretion cover the body, indicating it has been in situ for a significant duration. The tail section of the bomb is missing, which is typical of unexploded bombs from WWII found in these circumstances and there is a significant hole in the case. The dimensions and characteristics gathered are consistent with a 500kg German bomb. Considering the state of the bomb the Net Explosive Quantity of the bomb is likely to be <5kg. | 53°31'50.249"N | 00°47'45.908"E | 20 | 10 |
Archaeological - The item is thought to be an air-delivered bomb. It appears to be in a stable condition and is resting on the seabed. Marine growth and concretion cover the body, indicating it has been in situ for a significant duration. The tail section of the bomb is missing, which is typical of unexploded bombs from WWII found in these circumstances and there is a significant hole in the case. The dimensions and characteristics gathered are consistent with a 500kg German bomb. Considering the state of the bomb the Net Explosive Quantity of the bomb is likely to be <5kg. | 53°31'49.895"N | 00°47'45.115"E | 20 |
10 |
Mariners are advised about survey works at the EGL1 corridor being undertaken for Eastern Green link 1which is an HVDC electricity transmission interconnector between England and Scotland, a joint venture between National Grid and Scottish Power. The survey works include Geotechnical Surveys (3x boreholes).
The works, managed by Prysmian, will be carried out by Sub-contractor HDI.
The survey works in Scottish waters will start on approximately the 7 th July 2025 and are expected to be completed by the 20th July 2025 (weather dependent).
Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 500m from the vessels identified.
Survey works will be ongoing and during the works the vessels will have restricted maneuverability as they complete their work scopes, which includes drop down equipment.
The vessels will not be towing equipment. The vessels will be the Jack-Up Barge 'Shearwater', Tug 'Feije' (or equivalent), High Speed Craft 'Venture' (or equivalent) and 'Jaguar' (or equivalent)
The Communication between the vessels will be through CH67 & 72.
VHF CH 16 will be monitored at all times and will be used to contact the coastguard in the event of an emergency.
See detailed map on our bulletin websitePlease be advised that there is a section of exposed cable between 51° 21.0462' N, 2° 44.1482' E and 51°19.0035N, 2°46.4372E. Until burial is conducted, there will be a guard vessel (Defender) on site but please ensure vessels proceed with caution. For further information please do not hesitate to get in touch.
Please be advised that there is a section of exposed cable between 51° 21.0462' N, 2° 44.1482' E and 51°19.0035N, 2°46.4372E. Until burial is conducted, there will be a guard vessel (Defender) on site but please ensure vessels proceed with caution. For further information please do not hesitate to get in touch.
See detailed map on our bulletin websiteThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreOil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MorePlease be advised that KMS Karelle will be undertaking a Vessel Traffic Survey of the proposed Ayre (NE2) Offshore Wind Farm lease option areas, on behalf of Thistle Wind Partners (TWP). The purpose of this Notice to Mariners (NtM) is to outline the working area for the survey vessel at the location, as well as their scope of work. The survey will utilise the vessel KMS Karelle.
A marine vessel traffic survey is due to be undertaken for the proposed Ayre Offshore Windfarm project. The survey will be undertaken from one survey vessel, KARELLE, and will involve the collection of data of detected vessels and marine users through use of onboard radar, AIS and visual survey methods. The survey will collect data within a proposed vessel roaming area within the project array area. The extent of the area in which the survey vessel may be located during the survey is shown in Figure 1 in this NtM with accompanying coordinates in Table 1. The survey vessel will roam and/or remain nominally static within the area for approximately 14 days depending on weather conditions. The survey may be extended beyond 14 days depending on weather conditions, at which point further notification will be provided. Dates may be subject to change. The survey vessel will operate on a 24hr basis and display appropriate navigational lights at all times during operations.
See detailed map on our bulletin websitePlease be advised that KMS Karelle will be undertaking a Vessel Traffic Survey of the proposed Bowdun (E3) Offshore Wind Farm lease option area, on behalf of Thistle Wind Partners (TWP). The purpose of this Notice to Mariners (NtM) is to outline the working area for the survey vessel at the location, as well as their scope of work. The survey will utilise the vessel KMS Karelle.
A marine vessel traffic survey is due to be undertaken for the proposed Bowdun Offshore Windfarm project. The survey will be undertaken from one survey vessel, KARELLE, and will involve the collection of data of detected vessels and marine users through use of onboard radar, AIS and visual survey methods.
The survey will collect data within a proposed vessel roaming area within the project array area. The extent of the area in which the survey vessel may be located during the survey is shown in Figure 1 in this NtM with accompanying coordinates in Table 1.
The survey vessel will roam and/or remain nominally static within the area for approximately 14 days depending on weather conditions. The survey may be extended beyond 14 days depending on weather conditions, at which point further notification will be provided. Dates may be subject to change. The survey vessel will operate on a 24hr basis and display appropriate navigational lights at all times during operations.
See detailed map on our bulletin websiteThis updated Notice to Mariners (NtM) is related to the Landfall Preparation Works for the NeuConnect Interconnector. Installation works are now complete between KP 0.4 (51°27.9768'N 000°42.9291'E) and KP 2 (51°28.6756'N 000°43.7398'E). Due to restrictions of tide and weather windows, all operations are anticipated to require 24-hour working. A post-landing survey to define the scope of remedial works will be undertaken following cable landing operations, commencing from the 23 October 2024.
Show MoreThe Jack-up WTG Installation Vessel, Voltaire, will install wind turbine generators (WTG) within the Dogger Bank A construction area.
The works will commence on the 05th of July 2023, continuing until approximately Q2 2024. The works will be continuous, 24 hours a day. A chart of the DBA 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. The safety zone will be monitored by a guard vessel. The primary response will be to warn passing traffic of the ongoing works and any active safety zones, and to alert any vessels where an infringement may occur or has occurred.
See detailed map on our bulletin websitePlease be advised that from the 29th June 2025 Ocean Ecology Ltd (OEL) may be undertaking drop-down camera (DDC) and water sampling surveys within the area shown within this notice.
The survey will employ the use DDC systems and Niskin water sampling devices. The works will be completed by personnel from OEL on the vessel DSV Curtis Marshall. The survey operations do not involve towed survey equipment. During deployment of equipment the vessel will be under restricted manoeuvrability and require sufficient clearance for safe working. During periods of poor weather, the vessel may return to port or alternative safe haven for shelter.
See detailed map on our bulletin websiteAs part of an "as found" survey, 3 x potentially hazardous unknown objects have been identified on the seabed in the Frigg area.
A recent review of "as found" data has identified the following 3 x potentially hazardous unknown objects. Further work will be done to agree on how and when to make the area safe:
Three submerged passive acoustic monitoring moorings were deployed by SAMS Enterprise within the boundary of the Southern Trench MPA and will remain in situ for 2 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 initial deployment was carried out in June (24/06). The works were executed from Fraserburgh Port by the vessel ARTEMIS.
Three submerged passive acoustic monitoring (PAM) moorings (see Figure Mooring Design) were deployed by SAMS Enterprise 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 initial deployment of the three PAM moorings took place in June 2025 (24/06). 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 (see also STPAM_as built locations):
Lat (dd mm.mmm) (N) |
Long (dd mm.mmm) (W) |
|
STPAM1 |
57° 37.115’ |
1° 39.049’ |
STPAM2 |
57° 51.055’ |
2° 03.132’ |
STPAM3 |
57° 50.095’ |
2° 42.110’ |
Vessel Name |
ARTEMIS |
Description |
Offshore Support Vessel, 27.69m OAL, 8.7m breadth, 5.1m depth |
VHF Call Sign |
MVIX5 |
MMSI |
233975000 |
Direct Number to Bridge/Master |
01261 455461 |
See detailed map on our bulletin website
To undertake a beam trawl survey in the southern North Sea and eastern Channel as part of an ICES co-ordinated research programme
To undertake a beam trawl survey in the southern North Sea and eastern Channel as part of an ICES co-ordnated research programme. To obtain fisheries independent data on the distribution and abundance of comercial flat fish. To collect biological data, includig maturity and weight at age of commercial species. To identify the epibenthos by catch taken in 4 - metre beam trawl.
The areas in the notice contain the beam trawl shoot co-ordinates. Please see the attached supporting information for further details on the shoot and haul stations.
See detailed map on our bulletin websiteThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThe MV Atlas will be completing decommissioning activities at the Viking field 500m zones. The vessel will be at location from the 3rd July for ~ 60 days.
The MV Atlas will be completing decommissioning activities at the Viking field 500m zones. The vessel will be at location from the 3rd July for ~ 60 days.
See detailed map on our bulletin websiteThe South & West WI lines have suffered from Upheaval Buckling and they have locations that can potentially become snagging hazards. The pipelines start from the platform and end at the WI manifolds. The length of the West WI line is 1.8km (1NM), to the South is 3.6km (1.95NM).
Two pipelines from the Scott platform to the West Water Injection Manifold and South Water Injection Manifold may represent a snagging hazard to fishing vessels. A section of each lines lies within existing 500m zones. The following guidance is specific for the sections of pieline lying outside of these. Note: this issue has been discussed with Scottish Fishermen’s Federation. CPEL is aware that we cannot prohibit the transit or over trawl of the areas external to the 500m zones however we hope that fishing vessel's will not deliberately over trawl a site for which they have been warned has a snagging risk. The primary responsibilities of the field ERRV vessels remain unchanged and they will continue to warn vessels who are demmed to be encroaching into the area. The following pertains only to the protection of the lines external to existing 500m zones where incursion rules do not apply: • Fishing vessels, likely to come pass over the lines given current heading at a distance not greater than 5nm travelling at speeds of below 6 kts; or vessels clearly demonstrating that they are performing fishing activities with gear deployed will be challenged; Fishing vessels travelling at speeds of 6kts and above will not be challenged; • Challenge shall take the form of a clear warning to the fishing vessels of the existence of subsea snagging hazards; • When challenge has been made the ERRV shall include a note in the official bridge log detailing, date, time, vessel challenged and any actions taken by the fishing vessel; • Where a potential over trawl has occurred the ERRV shall notify the CNOOC representative using existing vessel 500m zone incursion process detailing, date, time, vessel(s) involved, point of overtrawl.
See detailed map on our bulletin websiteMariners are advised about survey works at the EGL1 corridor being undertaken for Eastern Green link 1which is an HVDC electricity transmission interconnector between England and Scotland, a joint venture between National Grid and Scottish Power. The survey works include Geotechnical Surveys. The survey works in English waters will start on approximately the 1st July 2025 and are expected to be completed by the 31st July 2025 (weather dependent).
Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 500m from the vessels identified. Survey works will be ongoing and during the works the vessels will have restricted maneuverability as they complete their work scopes, which includes drop down equipment. The vessels will not be towing equipment. The Communication between the vessels will be through CH67 & 72. VHF CH 16 will be monitored at all times and will be used to contact the coastguard in the event of an emergency.
See detailed map on our bulletin websiteUse of towed geophysical equipment to detect potential buried UXO.
Show MorePlease note that although a successful SFF post decommissioning seabed trawl verification sweep has taken place in the Kingfisher 500 metre safety zone, this did not include the central wellhead location and surrounding drill cuttings and hazards may remain in the location highlighted.
Using best endeavours and practice available, no oilfield related obstructions were encountered in the remainder of the 500 metre safety zone and nearby section of rock dumped pipeline (from 58°46.3423'N, 001°28.6741'E to 58°46.3237'N, 001°28.8188'E). To the best of our knowledge the swept areas have been successfully cleared of all equipment / infrastructure and at the time of these trials the swept areas were found to be safe for normal fishing operations.
See detailed map on our bulletin websiteSubsea cable installation works between Mull and Iona. The cable installation will take place with the Blue Sky and will be assisted with support boats, regularly passing inside the working corridor for crew transfers and supporting nearshore cable landing operations.
The cable installation will take place with the Blue Sky and will be assisted with support boats, regularly passing inside the working corridor for crew transfers and supporting nearshore cable landing operations.
Split pipe protection will be installed by divers.
Removal of fishing gear from the Installation Corridor (Figure 1) is requested during the period 21st July-8th August. Contact details for the FLO and FIR are provided at the end of this NtM.
See detailed map on our bulletin websiteSubsea cable installation between Coll and Tiree.
Ahead of subsea cable installation operations, shore end teams will utilise ‘Flo West’ (or similar craft) for transiting between Coll and Tiree landfalls during operations.
Pre-installation activities will involve Pre-Lay Grapnel Runs (PLGR) to clear any debris, carried out across the cable installation route.
The cable installation will take place with the Blue Sky and will be assisted with support boats, regularly passing inside the working corridor for crew transfers and supporting nearshore cable landing operations.
Split pipe protection will be installed by divers, followed by rock bag installation. Removal of fishing gear from the Installation Corridor (Figure 1) is requested during the period 9th July to 23rd August. Contact details for the FLO ad DIR are provided at the end of this Notice to Mariners (NtM).
See detailed map on our bulletin websitePlease be advised that Briggs Marine Contractors (on behalf of SHEPD) will be installing two new subsea cables between Southern Loch Linnhe, Loch A'Choire - Kilmalieu.
Pre-installation activities will involve placement of mattress protection and Pre-Lay Grapnel Runs (PLGR) to clear any debris, carried out across the cable installation route.
Split pipe protection will be installed by divers, followed by rock bag installation and then both subsea cables will then be trenched.
Removal of fishing gear from the Installation Corridor (Figure 1) is requested during the period 3rd July - 2nd October. Contact details for the FLO and FIR are provided at the end of this NtM.
See detailed map on our bulletin websiteThe Well-Safe Protector will move location from well D15A in the Dutch sector to the York platform in UKCS block 47/3 to undertake well plug and abandonment, on or around 9th June 2025. This date is subject to change depending on weather and operational requirements. Operations at York are expected to finish in the area by the end of October 2025.
The Well-Safe Protector will move location from the D15 platform in the Dutch sector to the York platform in UKCS block 47/3 to undertake well plug and abandonment, on week beginning 9th June 2025. This date is subject to change depending on weather and operational requirements. Operations at York are expected to finish in the area by the end of October 2025.
RWE Renewables UK Wind Ltd at Rampion Windfarm would like to inform mariners that we are carrying out essential maintenance on the wind turbines, this is an updated asset list due to additional repairs being required. This work commenced on 20th May 2025 for 120 days, within the Rampion OWF Area, depending on weather conditions.
RWE Renewables UK Wind Ltd at Rampion Windfarm would like to inform mariners that we are carrying out essential maintenance on the wind turbines, this is an updated asset list due to additional repairs being required.
This work commenced on 20th May 2025 for 120 days, within the Rampion OWF Area, depending on weather conditions.
Start Date: Subject to weather 20th May 2025 For the safety of the working party and anyone in the vicinity of the works, mariners are requested to be vigilant if approaching any of the below listed locations and adhere to a 500m exclusion zone around any locations upon which repairs are being carried out.
See detailed map on our bulletin websitePlease be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey acrossa submarine electricity cable corridor in the west of Chichester Harbour. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting
The operations will be undertaken by the Spectrum Nyquist pictured below. The vessels may not commence their activities at the same time but may operate simultaneously at times over the duration of the operation. The vessels may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12.
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin websiteGreen Volt Offshore Wind Farm Limited will conduct a Geotechnical Survey within the Green Volt array area. The survey will be carried out by the Gardline vessel Horizon Prospector with mobilisation planned on the 1st July 2025 and the survey anticipated to last until the 31st August 2025. The vessel Ocean Vantage will also be on site to assist with CPTs.
This Notice is to inform that the Green Volt Offshore Windfarm Ltd will be carrying out a Geotechnical survey within the Green Volt array area. The survey will be carried out by the Gardline vessel Horizon Prospector with mobilisation planned for the 1 st July 2025 and the survey anticipated to last until the 31st August 2025. The Geotechnical survey will comprise of bore holes and seabed Cone Penetration Tests (CPT) during this period. The vessel Ocean Vantage will also be on site to assist with CPTs.
See detailed map on our bulletin websiteXOCEAN will be conducting a geophysical data survey for a proposed cable route between the Isle of Islay and West Kintyre. The survey, expected to start around 1st July 2025 and last 3-4 weeks (weather permitting), will utilise remotely piloted Uncrewed Surface Vessels (USVs). These USVs will operate out of Lagavulin Bay and will be equipped with both hull-mounted sensors and towed sensors (Sidescan Sonar & Magnetometer) to collect data near the seabed.
Survey Activities: XOCEAN is planning the collection of geophysical data using remotely piloted Uncrewed Surface Vessels (USVs) along a proposed cable route corridor from Isle of Islay to West Kintyre. The USVs are expected to operate out of Lagavulin bay for the full length of survey. A mix of USVs that use 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 the port and assist in towing them back in if a technical issue occurs.
Dates/Duration: Operations are expected to commence around 1st July 2025. It is expected that the survey activities shall be completed within 3-4 weeks (subject to weather).
See detailed map on our bulletin website
The Valaris Norway is adjacent to the Cygnus Alpha, operating within the 500m zone. Anchors may extend beyond this point. *Please note that there is a slight delay between Cygnus A and Valaris Norway navigational aid activation, following assessment a dispensation has been approved under CL/63/8*
The Valaris Norway is adjacent to the Cygnus Alpha, operating within the 500m zone. Anchors may extend beyond this point.
*Please note that there is a slight delay between Cygnus A and Valaris Norway navigational aid activation, following assessment a dispensation has been approved under CL/63/8*
See detailed map on our bulletin websiteAll mariners and stakeholders are advised that unexploded ordnance mitigation and clearance works will commence within the Inch Cape export cable corridor, today Wednesday 18th June.
All mariners and stakeholders are advised that unexploded ordnance mitigation and clearance works will commence within the Inch Cape export cable corridor and wind farm site.
Whilst low order disposal techniques are preferred, high order disposal methodology may be used depending on the condition of individual items.
All mitigation and clearance activities will be conducted from the vessel 4-Winds which will utilise a support rigid inflatable vessel.
The 4-Winds will manage avoidance zones during disposal operations, informing any vessels in the vicinity of operations via VHF radio calls.
4-Winds is expected to commence confirmed unexploded ordnance clearance and mitigation activities today, 18th June
See detailed map on our bulletin websitePlease be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections of several cables across the Outer Hebrides marine areas. Please refer to the attached NtM for more details.
Cables included within this NtM are:
The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates. All vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations. All survey vessels will monitor VHF Channel 16 throughout survey. operations.
See detailed map on our bulletin websiteSerica is proposing to remove two of the Bruce Platform caissons. Caissons C12 and C15 are seawater lift caissons that are being removed due to degraded integrity. Both caissons C12 and C15 are no longer in use. The caissons are mounted on the PUQ jacket with a termination depth of -53.5m. The Island Ocean MPSV will be working with the Bruce Platform 500m zone throughout the operation.
Serica is proposing to remove two of the Bruce Platform caissons. Caissons C12 and C15 are seawater lift caissons that are being removed due to degraded integrity. Both caissons C12 and C15 are no longer in use. The caissons are mounted on the PUQ jacket with a termination depth of -53.5m. The Island Ocean MPSV will be working with the Bruce Platform 500m zone throughout the operation.
See detailed map on our bulletin websitePlease be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections of several cables across the Argyll marine areas. Please refer to the attached NtM for more details.
Cables included within this NtM are:
The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates. All vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations. All survey vessels will monitor VHF Channel 16 throughout survey. operations.
See detailed map on our bulletin websitePlease be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections of several cables across the West Highlands and Argyll marine areas. Please refer to the attached NtM for more details.
Cables included within this NtM are:
The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates. All vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations. All survey vessels will monitor VHF Channel 16 throughout survey. operations.
See detailed map on our bulletin websitePlease be advised that the Jack-up rig 'Noble Innovator' is alongside the Mungo Platform, and will remain in this position for the foreseeable.
Please be advised that the Jack-up rig 'Noble Innovator' is alongside the Mungo Platform, and will remain in this position for the foreseeable.
See detailed map on our bulletin websiteDuring the recovery of a Seawatch Wind LiDAR Buoy (COWF-SWLB075) within the Caledonia Offshore Wind Farm, the mooring system’s clump weight detached and remains on site. Marine users towing demersal gear are advised to maintain a safe clearance distance (500m) from this location.
Clump weight is 2500kg, approximately 0.75m^3 and lies <1m on the seabed.
See detailed map on our bulletin websitePlease be advised of this notice advising mariners of the dredging and repair of Gwynt Y Mor export cable. The Capall Mara will carry out the dredging works and will be assisted by CTV Gladiator. The work will start last week of June/first week of July. The works are scheduled to mid of August subject to weather.
Please be advised of this notice advising mariners of the dredging and repair of Gwynt Y Mor export cable. The Capall Mara will carry out the dredging works and will be assisted by CTV Gladiator. The work will start last week of June/first week of July. The works are scheduled to mid of August subject to weather.
See detailed map on our bulletin websiteScientific Array comprising of 6 Kelpedo units and sensors.
Operation of 6 Kelpedo seaweed units within a 600m x 100m licensed array area commencing from the 25th February 2025.
Kelpedo units will remain in position until March 2026. Monthly maintenance and inspection of the array will be undertaken by the R.V. Fortuna. During operations R.V Fortuna will be restricted in its ability to manoeuvre and will display appropriate day shapes and light in accordance with COLREGs, alongside transmitting its position on AIS.
The site will consist of 6 modular scientific KelpedoTM units, with each comprising of anchor weight, rising chain and riser rope, custom version of a KelpedoTM and a HDPE special marker buoy. Units will be sequentially number 1 – 6 from North to South.
The special marker buoys are bright yellow HDPE pillars, 1.5m in height, with an integrated reflector, St Andrews Cross and a 360° yellow warning light. Lighting Sequence FL(5) Y 20s.
See detailed map on our bulletin websitePlease be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across a submarine electricity cable corridor in the River Medina, Isle of Wight. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting
The operations will be undertaken by the Spectrum Nyquist pictured below. The vessel may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin websitePlease be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across submarine electricity cable corridors in the western Solent. The works will utilise the following vessels to complete survey operations: Spectrum 1 Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 8 weeks, weather permitting.
The operations will be undertaken by the Spectrum 1 and Spectrum Nyquist. The vessels may not commence their activities at the same time but may operate simultaneously at times over the duration of the operation. The vessels may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use a combination of Spectrum 1 and Spectrum Nyquist vessels. These vessels will acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12.
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin website
Please be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across a submarine electricity cable corridor across Hole Bay, Poole Harbour. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting.
The operations will be undertaken by the Spectrum Nyquist pictured below. The vessel may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin websitePlease be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across a submarine electricity cable corridor in Poole Harbour. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting.
The operations will be undertaken by the Spectrum Nyquist pictured below. The vessel may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin websitePlease be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across a submarine electricity cable corridor across the Poole Harbour. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting.
The operations will be undertaken by the Spectrum Nyquist pictured below. The vessel may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin websitePlease be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across a submarine electricity cable corridor in Haslar Lake. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting.
The operations will be undertaken by the Spectrum Nyquist pictured below. The vessel may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12.
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin website
Please be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across a submarine electricity cable corridor in the Heavy Reach, Portsmouth Harbour. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting.
The operations will be undertaken by the Spectrum Nyquist pictured below. The vessel may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin websitePlease be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across a submarine electricity cable corridor in Poole Harbour. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting.
The operations will be undertaken by the Spectrum Nyquist pictured below. The vessel may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
Survey Description
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12.
Fisheries Liaison Officers
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176. The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the area. iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence
See detailed map on our bulletin websitePlease be advised that Spectrum (on behalf of SEPD) will be undertaking a Geophysical Survey across a submarine electricity cable corridor in the Beaulieu River. The works will utilise the following vessel to complete survey operations: Spectrum Nyquist The operations will commence during an appropriate weather window following 30/06/2025 and will take place intermittently over a period of 4 weeks, weather permitting
The operations will be undertaken by the Spectrum Nyquist. The vessel may operate primarily from Cowes, Isle of Wight but may use other ports along the Solent coastlines, such as Yarmouth, Lymington, Portsmouth or Poole Harbour.
The survey operations will use the Spectrum Nyquist to acquire data from survey line plan within a corridor around the proposed cable route. An additional larger operational area around the survey area will be utilised for vessel manoeuvring. Other vessels should maintain an appropriate and safe distance of 500 m when passing the survey vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 12-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12.
Fishing liaison for the operations will be co-ordinated by Brown & May Marine. For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Meg Kalafat at Meg.Kalafat@brownmay.com or +44 7702710176 The local Fishing Industries Representative (FIR) Ian White will also be in place to liaise with the vessels and fishing operations in the are - iannwhite@hotmail.co.uk or +44 7986774725
Legal Notice -
Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, we request that you plan your activities around our short-term, temporary activities. Entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment. Entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence.
See detailed map on our bulletin websiteThe Subsea Abbey-2 WHPS (wellhead protective structure) is installed over the well, but the structure requires further work to complete. The work is planned to be completed in the spring, but in the meantime the location is to be guarded by a guard vessel, initially the Putford Terminator ERRV will maintain a controlled 500m zone around the Abbey-2 subsea well location. Work is expected to be complete in mid June and this controlled zone will end.
Show MoreThe EDT Protea will mobilise from Blackpool to the North Morecambe DPPA platform in UKCS block 110/2 to act as a walk to work vessel, on or around 15th June 2025. Operations will be conducted within the existing DPPA 500m exclusion zone and are expected to take 46 days with completion expected by the end of August 2025. These dates are subject to change depending on weather and operational requirements.
Show MorePlease be advised that from the 18th June 2025 Ocean Ecology Ltd (OEL) will be undertaking seabed grab, drop-down camera (DDC), and water sampling surveys within the areas shown in this notice.
The survey will employ the use of 0.1m2 Dual Van Veen and Hamon grabs to obtain sediment samples of the seabed, as well as OEL’s in-house DDC systems and Niskin water sampling devices. The works will be completed by personnel from OEL on the vessel DSV Curtis Marshall. The survey operations do not involve towed survey equipment. During deployment of equipment the vessel will be under restricted manoeuvrability and require sufficient clearance for safe working. During periods of poor weather, the vessel may return to port or alternative safe haven for shelter.
See detailed map on our bulletin websiteMariners are advised that Seaway 7 have deployed a Wave Rider Buoy within the East Anglia THREE Offshore Windfarm Area
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
See detailed map on our bulletin website
*Note all items are located within an active 500m safety zones, however Shell is issuing the alert as contingency* As part of the decommissioning of the Atlantic & Cromarty facilities, we have removed the wellheads from Atlantic Wells A1/A2, and the Cromarty well. The 2 goose-necks (1xA1 Well & 1xA2 Well) and pig receiver at Cromarty well remains on the seabed. All surface-laid items are part of a decommissioning project which is subject to an ongoing tender. Potential execution early as 2026.
Show MorePlease be advised that Seiche Limited have performed a service on the 12 Passive Acoustic Monitoring (PAM) Stations that have been deployed on the seabed, in and at locations around the East Anglia THREE Offshore Windfarm area. An additional five Passive Acoustic Monitoring stations have also been deployed. As Detailed in NTM 035 - 2025
Service of the 12 Passive Acoustic Monitoring (PAM) stations that have been deployed on the sea bed, in and at locations around the East Anglia THREE Offshore Windfarm Area.
There is an exclusion zone of 250m around each PAM station, all marine traffic is advised to abide by the 250m safety zone and navigate with caution at all times.
An additional 5 PAM stations have been deployed in positions found in the attached NTM 035-2025.
For further information regarding PAM station , please see attached East Anglia Three Notice To Mariners 035 - 2025.
See detailed map on our bulletin website15th May: Install 12 x Pre-Lay Anchors. 21st May: Stena Don will be on location hooking up anchors and commencing operations. 10th September: Rig off location
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
See detailed map on our bulletin websiteMariners are advised that Berwick Bank Offshore Wind Farm (BBOWF) will undertake further geophysical survey assessments within export cable route areas.
Whilst the vessel will tow survey equipment, BBOWF do not require fishing gear to be relocated and can operate around static fishing gear present within the survey area.
Survey Duration
The survey is anticipated to commence 26 May 2025 (+/- 2 days pending vessel availability), and will involve 7 days total of operational survey time. To account for weather delays and all eventualities we would like to extend the validity of this notice to 31 July 2025. The survey will be undertaken by an X-Ocean USV. A support vessel will escort the USV from the active ports to clear water. Please note that although the vessel is uncrewed, it will be piloted remotely using 360 degree cameras and other navigational aids. Vessel details are included within the attached Notice to Mariners document.
Survey Tasks
The surveys involve deployment of:
Multi Beam Echosounder;
Sub-bottom profiler;
Magnetometer;
Ultra-short Baseline; and,
Sub-bottom Profiler.
All mariners are advised to keep a safe clearance distance of no less than 500m from the vessel.
See detailed map on our bulletin websiteA spherical wave buoy with a diameter of 0.4 meters was installed in the Pierce Field.
WGS84: 57° 09' 21.72''N, 002°16' 11.34'' E
Clump weight: 140 kg steel ballast with chain
Deployment date: 13/04/2025
Radius cone: ~120m
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.
There are two auxiliary floats, each with a diameter of 11'' and in red, within 20 m of the buoy.
See detailed map on our bulletin websiteA yellow spherical wave buoy with a diameter of 0.9 meters was installed in the Penguins Field. The buoy has a clump weight of 500kg (steel ballast with chain) and has a radius cone of 300m. LED light: 5 flashes in 10 s 20 s repetition 360° around for 4 Nm distance
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis Notice is to inform that one of the Green Volt Offshore Windfarm Ltd floating metocean devices (Triaxys wave buoy) broke free from its moorings on 23rd July 2024 due to being dragged by a passing vessel. Marine users should be aware that the Triaxys wave buoy’s mooring system, including the two floats remain on site and unmarked. The buoy itself has been recovered and relocated. The coordinate provided is the the last known location of the mooring.
The mooring system consists of a 15 m rubber cord, a 60 mm polypropylene rope, two floats, another 80 m of polypropylene rope attached to bottom chains (see Figure 2). Marine users should maintain a recommended 500 metre safe clearance distance from the buffer area shown in Figure 1 due to the risk of snagging or propellor fouling. Updates will be issued via a revised Notice to Mariners when available.
UPDATE: Further updates on recovery attempts will be issued via a revised Notice to Mariners when available.
See detailed map on our bulletin websiteThe ERDA jackup Barge will undertake hydrocarbon safe (HCS) and well plug and abandonment (P&A) works at the Garrow installation. Works will be between 10 June 2025 and 1 August 2025. The ERDA will be located within the Garrow 500m exclusion zone.
The ERDA jackup Barge will undertake hydrocarbon safe (HCS) and well plug and abandonment (P&A) works at the Garrow installation. Works will be between 10 June 2025 and 1 August 2025. The ERDA will be located within the Garrow 500m exclusion zone.
See detailed map on our bulletin websiteThe Deep Vision (Call sign 2CVC8) will be carrying annual pipeline inspection along various pipelines and structures in the Northern and Central North Sea.
The Deep Vision (Call sign 2CVC8) will be carrying annual pipeline inspection along various pipelines and structures in the Northern and Central North Sea. The vessel will work north to south, starting at the Penguins field and completing north of the Fulmar platform. The vessel will be performing non-intrusive ROV survey both dynamically along pipelines and sometimes stationary along small lines and structures.
See detailed map on our bulletin websiteA offshore geotechnical survey within the proposed Morgan Offshore Wind Project (Generation Assets) and Mona Offshore Wind Project (see figure 1 and table 1 in the attached notice) is estimated to begin on the 2nd June 2025. The works will be undertaken by Fugro Synergy.
The survey involves the drilling, sampling and coring of boreholes throughout the array areas. The vessel will be stationary at each borehole location for up to 3 days to allow the samples and cores to be taken from the seabed. 24 hour and 7day lookaheads containing details of the positions of Fugro Synergy will be provided.
An Offshore Fisheries Liaison Officer (OFLO) will not be present on board the vessel during the survey but the project Fishing Industry Representative (FIR) and/or Company FLO (CLFO) can be contacted with any specific queries.
Contact details for the FIR and CFLO are provided in the attached notice.
See detailed map on our bulletin websiteSubsea basket left in place awaiting removal
A subsea basket containing a cut off of previously exposed pipeline at PL2557 has had to be left in situ due to problems with the vessel crane. Vessel to return and remove basket at earliest opportunity. The basket being left on the seabed is temporary.
See detailed map on our bulletin websitePartrac Ltd., on behalf of Thistle Wind Partners, has deployed and is maintaining metocean equipment, a Seabed mooring, within the boundary of the proposed Ayre array area. The re-deploying of the metocean equipment is estimated to be carried out over one day from the 07th of May 2025, weather permitting, using the vessel, CTV Waterfall.
Partrac Ltd., on behalf of Thistle Wind Partners would like vessels to note that there is 100m HMPE recovery rope connected to the anchor weight which may be suspended in the water column. All vessels are to avoid the area. There will be an attempt to locate and recover the line and anchor.
The following equipment will be recovered, maintained, and redeployed on the site:
Maintenance activities will include but not be limited to:
All vessels are requested to maintain a 500m exclusion zone around the location.
See detailed map on our bulletin website
Two [2] Autonomous Underwater Vehicles [AUVs] will be undertaking missions coordinated through the National Oceanography Centre [NOC]. The Autonomous Underwater Vehicles will be deployed East of Aberdeen and transit to the marked work areas, where the gliders will aim to remain for the duration of the deployment. PLEASE KEEP SHARP LOOK OUT FOR THIS VESSEL AND KEEP WELL CLEAR
The aim of the mission is to collect physical oceanographic data. The AUVs will be recovered by 7th November 2025. The vehicles are Autonomous Underwater Vehicles [AUV] of battery powered glider type [see attachment]. They are yellow with black banding. They are equal to or less than 2 metres in length. They spend most of the time submerged, occasionally surfacing. They are active and under remote control and supervision when they are on the surface.
See detailed map on our bulletin website
Mariners are advised that NKT will conduct cable installation through Simultaneous Laying and Burial (SLB) along the East Anglia THREE export cable corridor. NKT will utilise the vessel ‘NKT VICTORIA’ for cable laying operations. All marine traffic is advised to maintain a 1000m safety zone around ‘NKT Victoria’ during operations and pass at a reduced speed.
Simultaneous Laying and Burial will be conducted between KP4.0 – KP148.0, inspection operations will be performed at third-party asset locations where applicable. During operations, NKT Victoria will have restricted manoeuvrability as defined under COLREGs (International Regulations for Preventing Collisions at Sea, 1972). The vessel will display appropriate day shapes and lights and will transmit an Automatic Identification System (AIS) message. ‘NKT Victoria’ will monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operation.
Victoria is expected to mobilise from the port of Karlskrona, Sweden on 14/06/2025. It is currently anticipated that weather permitting, works will be conducted on a continuous basis (i.e., 24-hour working, seven days a week).
See detailed map on our bulletin websiteDuring a rig site survey in the K2 field, surveyors identified 3 potential existing anchors and associated lengths of mooring that are on the seabed. The original source for the anchors is unknown and it is unclear how long they have been left on the seabed.
It can be confirmed that these anchors are not associated with drilling activity that took place in field in 2023. It is assumed that the anchors pre-date this campaign i.e. prior to 2023.
Note that Potential Anchor No. 3 has a broken tether attached. The northern part (attached to anchor) measures approx. 125.1m and the northern part measures approx. 336.7m. SSS Mosaics attached for reference.
The SFF have advised putting co-ordinates on Kingfisher.
See detailed map on our bulletin websitePartrac Ltd., on behalf of Thistle Wind Partners, has deployed and is maintaining metocean equipment (a Seabed mooring), within the boundary of the proposed Bowdun array area located off the east coast of Scotland.
The following equipment will be recovered, maintained, and redeployed on the site:
Maintenance activities will include but not be limited to:
All vessels are requested to maintain a 500m exclusion zone around the location.
See detailed map on our bulletin websiteJack Up onsite for major maintenance to be carried out at the noted locations throughout the wind Farm. During operations there will be a 500mtr exclusion zone around the location of the Jack Up.
Major component repairs are to be carried out on Beatrice Windfarn involving the use of a self propelled jack up (Blue Tern).
The work will be undertaken from the 30th of May lasting for approximately 8 weeks. The vessel will operate at six locations on the Beatrice Winfarm replacing the main bearings on WTG BE-A05, BE-D08, BE-F09, BE-F13 BE-G13 and BE-J10
See detailed map on our bulletin websiteThis is to raise awareness that the Construction Buoyage within the Moray Offshore Windfarm (West) Limited (Moray West) site will be removed in June or July 2025.
This is to raise awareness that the Construction Buoyage within the Moray Offshore Windfarm (West) Limited (Moray West) site will be removed in June or July 2025. This Notice supersedes the previous version which anticipated removal of the buoyage in April or May 2025. The Construction Buoyage currently remains in place, with this document highlighting the new removal dates.
See detailed map on our bulletin websiteThe semisubmersible floatel Safe Caledonia is currently located at the Captain Field, positioned on the west side of the WPP platform. The unit is secured in place using a 10-point mooring system. While the floatel itself remains well within the WPP 500-meter safety zone, the majority of its mooring lines extend significantly beyond this boundary. These mooring lines are composed of chain, fiber, and rig wire, and are supported by intermediate buoys.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreHarbour Energy is scheduled to conduct subsea well intervention operations on five wells (30/07a-M5, M8, M9, M10, and M11Z) in the Joanne field. Operations will be carried out using the Dolphin PBLJ semi-submersible drilling rig, which will relocate from the shipyard in Olen, Norway to the Joanne field on 29 August 2025.
Harbour Energy is scheduled to conduct subsea well intervention operations on five wells (30/07a-M5, M8, M9, M10, and M11Z) in the Joanne field. Operations will be carried out using the Dolphin PBLJ semi-submersible drilling rig, which will relocate from the shipyard in Olen, Norway to the Joanne field on 29 August 2025.
See detailed map on our bulletin websitePlease be advised that A-2-Sea Solutions Ltd (on behalf of Transmission Investment) will be undertaking a pre-construction landfall and marine site investigation survey across the proposed LirIC Interconnector (LirIC) Project’ cable route.
Marine Survey operations be conducted by the MINTAKA 1 and the White Ribbon Nearshore vessel and shall consist of Geophysical data acquisition using hull mounted and towed sensors. This is followed by a Benthic environmental campaign consisting of video imagery and in-situ grab sampling operations. Other vessels should maintain an appropriate and safe distance of 500 m when passing the Mintaka 1 and FPV Morven vessel(s) whilst undertaking operations and should pass at the lowest possible speed to avoid vessel wash effects. The vessel(s) will be working 24-hour operations and will display appropriate day shapes and lights during reduced visibility and night operations. The vessel(s) will also monitor VHF Channels 16 and 12.
See detailed map on our bulletin websiteMetocean instrumentation and a floating LiDAR system (FLS) have been deployed within the boundary of the proposed Muir Mhòr Offshore Wind Farm Project site. MARINE USERS are requested to maintain a safe clearance distance of 500m from all assets. August 2024: replacement of northern guard buoy & FLS completed end Aug 2024, deployed from Peterhead Port. All AIS & marine safety information remain unchanged from the original Dec 2022 notice.
All instrumentation is deployed at a single deployment location within the project site. The purpose of the instrumentation is to gather Metocean and wind data to inform the proposed Muir Mhor Offshore Wind Farm Project.
All instrumentation was deployed by Green Rebel from the Port of Aberdeen to the site in February 2023 via the vessel BB Ocean (IMO 9196503, MMSI 258825000).
The FLS mooring comprises of a surface visible buoy moored to the seabed via a two-point mooring system constructed using a combination of rope and chain. Two guard buoys are located at approximately 30m from the main FLS buoy in a North/South orientation, with the mooring spread covering an approximate 315m radius. There is also a seabed frame for current measurements contained within the overall deployment footprint, approximately 30m East of the main FLS buoy. Note: there are 2x orange polyform marker buoys located above the northern anchor position (detailed below) which will be removed during the first planned maintenance visit.
The FLS light characteristics are Fl (5) Y 20s with 5nm range. The guard buoys’ light characteristics are FI Y 5s with 3nm range and include a yellow St. Andrew’s Cross topmark. The FLS is designated as “Muir Mhor Floating Lidar” on AIS, with MMSI number 992351400.
Details of the surface visible buoy, guard buoys, seabed frame and mooring arrangement are provided in the attachments.
MARINE USERS are requested to maintain a safe clearance distance of 500m from all assets.
See detailed map on our bulletin websiteThis is to raise awareness that Special Mark MW3 within the Moray Offshore Windfarm (West) Limited (Moray West) site is currently unlit.
This Notice is to raise awareness that Special Mark MW3 within the Moray Offshore Windfarm (West) Limited (Moray West) site is currently unlit.
The Moray West site is located on the Smith Bank in the Outer Moray Firth, approximately 22.5km from the Caithness coastline. The offshore wind farm site covers an area of approximately 225km². The offshore wind farm site is given in Figure 1.
The site is now under operational control, with all operational lighting installed and functional as per the Moray West Lighting and Marking Plan. Moray West will soon be looking to remove the construction lighting and buoyage from the area.
As the operational lighting is now in place, it is considered that Special Mark MW3 being unlit will not pose a risk to any vessels, and this notification is for awareness only. Special Mark MW3 is located at 58° 00' 50” N, 003° 07' 10” W and is shown on Figure 2 (red circle).
See detailed map on our bulletin websiteMariners are advised that Hornsea Three is conducting a potential UXO (pUXO) inspection campaign, in relation to the Hornsea Three Generation Assets (array area).
Mariners are advised that, as of 2nd May 2025, Hornsea Three have identified and confirmed 13 pUXOs as cUXOs within the Hornsea Three array area, the coordinates of which are provided in Table 1 and shown in Figure 1. All vessels are requested to maintain the required safe distance (500m) as defined from the coordinates set out in Table 1 and Figure 1. The EOD works for the Hornsea Three array area, are expected to be undertaken in a separate campaign commencing in Q3 2025.
See detailed map on our bulletin websiteThe HAEVA Jackup Barge will undertake subsea well plug and abandonment (P&A) works and the removal of the Wellhead Protection Structure (WHPS) at the Durango subsea well. Works will be between 15 June 2025 and 1 August 2025.
The HAEVA Jackup Barge will undertake subsea well plug and abandonment (P&A) works and the removal of the Wellhead Protection Structure (WHPS) at the Durango subsea well. Works will be between 15 June 2025 and 1 August 2025.
See detailed map on our bulletin websitePlease be advised that Asso.subsea will be performing trenching and boulder clearance on behalf of Nexans for CIDAC as part of the Celtic Interconnector Project. The operations will be located along the planned route of the Celtic Interconnector Project offshore cable route between the southeast coast of Ireland and the coast of France. This Notice to Mariners captures trenching activities which will be undertaken in the UK EEZ waters.
The operations will be conducted within the cable corridor extending +/-200m each side of planned cable centreline and inbetween the waypoints provided.
Mariners are advised to provide wide berth (at least 0.5nm) and navigate with caution in the area. Fixed fishing gear within the corridor of +/- 1000m from the route centreline is required to be removed.
See detailed map on our bulletin websiteSubsea construction activities associated with the Murlach project in block 22/24h.
Subsea construction activites including XT Commissioning, umbilical Installation, spool installations, gas lift line installation etc as part of the Murlach project, in block 22/24h of the Central North Sea.
See detailed map on our bulletin websiteNOTE: The Penguins Field has been granted an extension to 31/05/26. The project includes extending the life of the existing wells and addition of eight new wells. The new wells will be tied into the existing Penguins infrastructure and connected into a new FPSO. The pipeline system will be split into a North and South production pipeline, with the FPSO positioned close to the centre of the field.
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.
See detailed map on our bulletin websiteConocoPhillips Norge intends to undertake some pipeline works at the NORPIPE Wye connection.
ConocoPhillips Norge intends to undertake some pipeline works to replace the existing ball valves at the main NORPIPE Wye connection. The Deep Arctic Dive Support Vessel will be on location from the 30th May for up to 21 days. This will be followed by a Flexible Fallpipe Vessel to lay some deposits in July or August for approximately 1 day. This notification is until the 31st August to cover both vessels activities.
See detailed map on our bulletin websiteA submerged marker buoy has been placed. The buoy is tethered 167m above the seabed at a depth of 934m. Vessels are requested to avoid.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreIrish Sea Pioneer Rig Move from Hamilton to the Lennox Platform (Liverpool Bay) completed. Irish Sea Pioneer now in combined operation with the Lennox Platform
Will be in combined operations (COMOPS) for approximately 180 days supporting ctivities for CCS (Carbon Capture & Storage)
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
See detailed map on our bulletin website
Starting June 2025, an oyster bank recovery project will take place at two sites in the Belgian North Sea. Structures seeded with oysters will be placed on the seabed within a 200m radius around each site. Bottom-disturbing activities like trawling or anchoring must be avoided to protect the oysters and prevent damage to fishing gear. Please proceed with caution around this area. For further information please do not hesitate to get in touch.
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
See detailed map on our bulletin websiteHarbour Energy are scheduled to complete P&A operations (using the Dolphin Paul B Loyd Junior – Semi Submersible) at Caledonia 16/26-25 – and then the rig to move to the Nicol field to abandon two subsea wells (15/25a-N1W & N2U). The move is currently planned for 20/05/25.
Harbour Energy are scheduled to complete P&A operations (using the Dolphin Paul B Loyd Junior – Semi Submersible) at Caledonia 16/26-25 – and then the rig to move to the Nicol field to abandon two subsea wells (15/25a-N1W & N2U). The move is currently planned for 20/05/25.
See detailed map on our bulletin websiteRWE Renewables UK Wind Ltd at Rampion Windfarm would like to inform mariners that we are carrying out essential maintenance on the wind turbines. This work is due commence on 20th May 2025 for 90 days, within the Rampion OWF Area, depending on weather conditions. The work involves; Essential external blade repairs on 8 WTG’s. Technicians will be carrying out essential repair works via external rope access which pose a material risk of snagging on passing vessels.
Show MoreFugro will commence geotechnical site investigations at the proposed Dogger Bank South Offshore Wind Farm (DBS) from around the 21st May 2025 until approximately end of September 2025. The exact start and finish dates will be dependent on the prevailing weather conditions and work progress.
Geotechnical survey operations on the proposed Dogger Bank South site will be undertaken using the following vessels and their expected start and finish dates.
Vesse | Start | Finish |
Fugro Revelation | 21/05/2025 | 02/07/2025 |
Fugro Scout | 14/07/2025 | 06/10/2025 |
RS Alegranza | 31/07/2025 | 28/09/2025 |
As the vessels will be conducting geotechnical drilling operations using a dynamic positioning system, it is requested that all vessels operating within this area keep their distance, maintaining at least a 500 m exclusion zone, and pass at minimum speed to reduce vessel wash.
A continuous listening watch will be conducted on VHF Channel 16 by all survey vessels.
Operations will be conducted on a 24-hour basis.
See detailed map on our bulletin websiteMariners are advised that SSE Renewables will be undertaking a benthic survey within a prospective offshore export cable route associated with Berwick Bank Offshore Wind Farm.
It should be noted that SSE Renewables are not requesting fishers to relocate gear - on this occasion the vessels will work around any gear on location. The survey work is being undertaken by Natural Power, utilising the Windcat 20 as the survey vessel (please see the updated notice to mariners attachment which provides further vessel details).
Once mobilised the survey will have a four day total duration. To allow for weather delays the expected completion date of the subtidal benthic survey will be 07 April 2025, however to allow for weather downtime, this notice will remain in effect until 31 August 2025.
During the survey campaign, the vessel will deploy an underwater drop down video/camera and mini Hamon grab to gather data on the ecology of the seabed. No towed gear operations will be taking place. The vessel will be generally unrestricted in its movements and will adhere to normal navigation protocol.
Updated Notice Information - 16 April 2025
Following completion of drop down video survey, the survey team will return to undertake grab sampling on Friday, 18 April 2025 depending on weather suitability. The vessel will be Gaoth Na Mara, please see the updated notice to mariners for further details.
See detailed map on our bulletin website
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
Show MoreThe Eider Alpha unmanned installation will have a construction vessel and ERRV working inside the 500m zone conducting preparation works for topside removal by HLV at latter end of working window provided.
Show MoreConstruction of the Princess Elisabeth Island. The exclusion zone around the construction site is marked by 4 cardinal buoys (ELI-N, ELI-E, ELI-S and ELI-W).
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.
See detailed map on our bulletin websiteOn behalf of Dogger Bank Windfarm, SMRU Consulting Ltd will carry out underwater noise monitoring between March and July 2025 during mono-piling operations to install foundation monopiles within and in the vicinity of the Dogger Bank C offshore wind farm construction area.
A total of 30 (thirty) sets of Passive Acoustic Monitoring (PAM) moorings have been deployed across an area approximately encompassing the Dogger Bank C array area boundary plus a 40km buffer, indicative coordinates are included below. The PAM moorings will remain in place for approximately 4 months before being recovered in July 2025.
See detailed map on our bulletin websiteThe Offshore installation vessel, HLV Seaway Strashnov and the HLV Seaway Strashnov will install wind turbine foundations in the Dogger Bank C offshore windfarm construction area.
The works will commence on the 22nd April 2025, continuing until approximately Q4 2025. The works will be continuous 24 hours a day. A chart of the DBC construction area is provided below. A running list of the next locations to be installed, mono-piled locations and completed foundations are presented in the Weekly Notice of Operations.
The installed monopiles will be marked with temporary lighting with the following characteristics:
• Flashing (Fl) Yellow (Y) 2.5 seconds (s)
• IALA Availability Category 2 (not less than 99.0%)
• 360° visibility – up to two lights per structure may be used to achieve this
• At least 2 nm range.
The temporary lighting will be removed prior to the installation of the transition piece and subsequent completion of the foundation
During operations, the HLV Seaway Strashnov and HLV Seaway Alfa Lft will be restricted in 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.
During operations, a Statutory Safety zone of 500m radius will be in place around the HLV Seaway Strashnov and HLV Seaway Alfa Lift. The safety zones will be monitored by a guard vessel. The primary response will be to warn passing traffic of the ongoing works and any active safety zones, and to alert any vessels where an infringement may occur or has occurred.
See detailed map on our bulletin websiteOne [1] Autonomous Underwater Vehicle [AUV] will be undertaking missions coordinated through the National Oceanography Centre, and the UK Met Office. All missions will be under the direction of the National Oceanography Centre. PLEASE KEEP SHARP LOOK OUT FOR THIS VESSEL AND KEEP WELL CLEAR
The Autonomous Underwater Vehicle will be deployed near shore and will navigate inside the study area (see attachement) for a period of 2-4 months. Every 2-4 months the AUV will be recovered and replaced with a new AUV that will again navigate the study area. This routine will continue for a year.
See detailed map on our bulletin websiteThe Dogger Bank C Offshore Substation Platform (OSP) will undergo a Commissioning phase within the Dogger Bank C construction area. The Jack up Vessel (JUV) HEA Hydra will jack up and connect to the DBC OSP by a fixed gangway. The HEA Hydra will remain on site during the Commissioning phase, acting as the accommodation platform and OSP emergency evacuation vessel
The works will commence on approximately the 15th of May 2025, continuing until approximately 11th of September 2025. The works will be continuous 24 hours a day. A chart of the DBC construction area and the installation location is provided below.
During operations, a Statutory Safety zone of 500m radius will be in place around the HEA Hydra for the duration of the Commissioning phase of the DBC OSP. Vessels are requested to maintain a minimum safe passing distance of 1km from the HEA Hydra during the operation.
The Platform Supply Vessel (PSV) FS Balmoral will support the HEA Hydra, carrying out regular supply runs to the offshore site.
During the Commissioning phase, there will be a requirement for rope access works to be carried out to the external parts of the OSP and Jacket. During these Over the Side (OTS) works the Dogger Bank OWF Guard vessel Jacobus will act as the Emergency Response Rescue Vessel (ERRV).
See detailed map on our bulletin websiteMariners are advised that Orsted Hornsea Project Three (UK) Limited is investigating an Aids to Navigation (AtoN) transmission fault at ANS3 located in Lowestoft following a report that the structure is not visible via AIS. The navigational light remains operational and is displaying the correct characteristic. An official notification has been issued through the Local Aids to Navigation Reporting System (LARS).
Show MoreDerrick & Substructure Removal Operations. Removal operations in advance of platform decommissioning.
Show MoreThis oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone. Max horizontal anchor distance from rig center 1400m.
8th May: 8x Pre-lay anchors will be spotted
13th May: Stena Don will be on location and hooking up anchors and commencing operations.
26th July: Stena Don will be off location moving to Curlew.
Max horizontal anchor distance from rig center 1400m.
See detailed map on our bulletin websiteThe area of planned activity will be over one area within the Beatrice Windfarm between WTG’s BE- F06 & BE-G07 (OTM1) which is detailed below. Work will be undertaken on the inter-array cable between these locations. BE-F06 58°14.168'N 002°54.169'W BE-G07 58°15.004'N 002°52.834' W
Major Maintenance works will be carried out to replace an inter-array cable on Beatrice Windfarm involving the use of a cable repair vessel (North Sea Enabler). This work will be undertaken from the 14th of May lasting until July 31st. The vessel will operate at one area on the Beatrice Windfarm.
Work will involve the removal of the existing inter-array cable and replacement. The cable will be laid within the existing trench as far as reasonably practicable using a control flow excavator. It is expected that the trench will naturaully backfill, and caution should be excersised during this time over the area. Further details will be provided at a later date regarding a guard vessel over the exposed cable.
See detailed map on our bulletin websiteThe object (L=9.0m, H=0.5m W=0.7m) is located on the seabed 13.5m NW from the gravel-covered Knarr pipeline. This target does not pose a significant hazard to other sea users.
Show MoreIdentification of pre-surveyed potential UXO along the Norfolk Vanguard West Export Cable corridor and Windfarm array by vessel N-Sea Pathfinder. A Work-Class ROV will be utilised to dive, dredge and identify Magnetic anomalies along the Norfolk Vanguard West cable corridors.
Show MorePlease be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea surveys in the Outer Hebrides marine area. Please refer to Figure 1 that highlights the survey area. The surveys are scheduled to commence on the week commencing Monday 12th May 2025, and be completed by August 2025.
Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea surveys in the Outer Hebrides marine area. Please refer to Figure 1 that highlights the survey area. The surveys are scheduled to commence on the week commencing Monday 12th May 2025, and be completed by August 2025.
Given the different conditions and water depths anticipated at each site, a range of vessels will be available for the project.
Start dates and anticipated durations listed against each individual location in the attached NtM.
LOCATION DETAILS
The survey corridor is noted in the attached NtM for information. Equipment calibration operations may take place out with the defined corridor and these areas will be chosen so as not to interfere with fishing / marine traffic activity.
VESSEL DETAILS
The vessels conducting these works will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes.
Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations.
All vessels will monitor VHF Channel 16 throughout survey operations. Mobile contacts for the vessels are listed at the end of the attached NtM.
See detailed map on our bulletin websiteMariners are advised that SSE Renewables will be returning to Berwick Bank Wind Farm area to undertake further Geotechnical survey work. The survey will be within the proposed Berwick Bank Wind Farm site boundary.
Overview
Mariners are advised that SSE Renewables will be returning to Berwick Bank Wind Farm area to continue Geotechnical survey work. The survey will be within the proposed Berwick Bank Wind Farm site boundary (see Figure 1 within the attached notice to mariners, respective co-ordinates are listed in Table 1).
It should be noted that SSE Renewables are not expecting fishers to relocate gear - on this occasion the vessel(s) will aim to work around any gear on location. A scouting/guard vessel will operate ahead of the survey vessel/s to ensure that this can be achieved.
The survey work is being undertaken by Fugro and will be conducted by multiple vessels. The scouting/guard vessel will be the Courage or the GV Reaper.
Updated Information - 08 April 2025
The Gargano is due to complete Cone Penetration Testing operations on the site by 13 April 2025. The Quest vessel, owned by Fugro, will commence a borehole campaign on the site starting 21 April 2025 at the earliest. The guard vessels will continue to be either the Courage or the Reaper alternating approximately every 21 days. Please see the attached Notice to Mariners for the vessel details.
Update Information - 24 April 2025
The Gargano (operated by Fugro) completed Cone Penetration Testing operations on 12 April 2025. The Quest vessel, operated by Fugro, will commence a borehole campaign on the site starting 25 April 2025 at the earliest. A third vessel operated by Fugro, named RS Alegranza (formerly Wind of Pride) will support on the survey campaign for up to one week on site, commencing work on 30 April 2025 at the earliest.
The guard vessels will continue to be either the Courage or the Reaper alternating approximately every 21 days. Please see below for vessel details. We would like to extend the validity of this notice until 30 September 2025.
See detailed map on our bulletin website
During a recent survey an unknown obstruction was encountered at 57°56.915’N, 001°12.575’E. The vessel’s creeper was snagged on a heavy weight and lost in approximately this position. A 0.1nm exclusion zone around this was maintained during the trawl sweep operations - fishermen are recommended to keep clear.
The MV “Fruitful Harvest” PD50 has carried out a post decommissioning trawl verification sweep of the Chestnut Field concerning the locations noted below. In this area the seabed is fairly static and mostly sand and shells, in a water depth of 100-129 metres. Using best endeavours and practice available, we can confirm that at the time of these trials the majority of the swept areas were found to be safe for normal fishing operations – except the areas highlighted in the notes below.
Location |
Central Position Coordinates (WGS84) |
Comments |
Hummingbird FPSO 500m safety zone |
57° 58.522’N 001° 14.260’E | NOTE 1: At position 57° 58.500’N, 001° 14.300’E the vessel encountered a small reduction in speed and gear spread, no damage to gear was reported. NOTE 2: At position 57° 58.000’N, 001° 15.100’E the vessel encountered a small reduction in speed and gear spread while crossing over Anchor 7 and 8, no damage to gear was reported. |
WI Well 22-2a-12 500m safety zone |
57° 57.281’N 001° 13.646’E | NOTE 3: At position 57° 57.300’N, 001° 13.600’E the vessel encountered a small reduction in speed and gear spread, no damage to gear was reported. |
PL2422 | 57° 58.140’N 001° 14.052’E | NOTE 4: At position 57° 58.200’N, 001° 14.300’E the vessel encountered a small reduction in speed and gear spread while crossing the pipeline, no damage to gear was reported. |
Well 16y 500m safety zone |
57° 56.997’N 001° 12.828’E |
NOTE 5: An unknown obstruction was encountered at 57° 56.915’N, 001° 12.575’E. The vessel’s creeper was snagged on |
Fishing vessels operating in the vicinity should do so with caution in the areas noted above.
See detailed map on our bulletin websiteThis jack-up accommodation rig will be moving to this new position around 28th April 2025. Rig is protected by a 500m safety zone but may have anchors extending beyond this zone.
This jack-up accommodation rig will be moving to this new position around 28th April 2025. Rig is protected by a 500m safety zone but may have anchors extending beyond this zone.
See detailed map on our bulletin websiteHazards remain as identified by a cable route maintenance survey in 2023 that detected sections of cable with intermittent exposures and potential free spans in the UK sector of the IFA 2000 Interconnector. These exposures were found across all four cables west of 001° 17.2’E . The licence application process for cable protection was initiated with the MMO in 2023. Cable protection operations can only commence with MMO licence in place. Fishing vessels are reminded to keep clear of this area.
The exposures are present intermittently across all four cable routes as shown below/on the map.
Application for licence to remediate exposures has been submitted. Fishermen are requested to stay well clear.
See detailed map on our bulletin websiteDana Petroleum (E&P) Limited has contracted Boskalis Subsea Services (BSS) for the Western Isles decommissioning project using the CSV Boka Northern Ocean.
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.
See detailed map on our bulletin websiteMobilization of SWIFT 10 drilling rig and P&A activity of 6 wells on the Wingate platform. Preparations for the decommissioning of the platform including P&A of all wells, conductor removal as well as pipeline cleaning.
Around the first week of April the SWIFT 10 jack-up rig will be mobilized from the Dutch Sector to perform the P&A of all 6 wells on the Wingate platform. The estimated term for completion of this scope is 4 months. During the initial positioning and demobilization of the drilling rig there will be 4 anchors deployed at ~500m from the platform. These will be recovered after positioning of the rig and deployed again when the rig is ready to be demobbed and returned to the Dutch sector.
A further notice will be sent when the date for the move is confirmed.
Update on timing. Rig schedule now shows the start of the mobilization for April 12th.
Rig move update. Departure from Dutch sector now planned for Thursday April 17th with arrival in UK sector of April 18th
Update: Departure from Dutch sector now planned for Friday April 18th with arrival in UK sector on April 19th
SWIFT 10 Rig is ready to commence decommissioning operations and will remain alongside Wingate platform until end of July
See detailed map on our bulletin website
The survey is a shooting methodology where ocean bottom nodes (OBN, single nodes, NO ropes) are rolled, and source operations are conducted centrally within the active node patch. Node Vessels: Havila Subsea. (dual ROV’s and a MantaRay vehicle with 6000 nodes) Source Vessels: Oceanic Champion
The survey will be acquired using the following vessels:
Node Vessels: Havila Subsea. The node vessel will be equipped with dual ROV’s and a MantaRay vehicle with a node inventory of 6000 Manta3000 nodes.
Source Vessels: Artemis Athene/Oceanic Champion. The source vessels are equipped with fully redundant hexa-source arrays of 800cu.in.
The survey will start from the south.
The area where nodes are layed out (present on the seafloor, blue in hte attached picture ABP25201_weeklyprogress_Modelled.png) will be updated regularly by Equinor Marin on BarentsWatch/FiskInfo https://www.barentswatch.no/fiskinfo/ (Seismikk, olje og gass - Equinor aktsomhetsområder, see attachment for example)
See detailed map on our bulletin website
This notice describes the current Dogger Bank A and B boundary demarcation buoys in the Southern North Sea
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.
See detailed map on our bulletin websiteNoble Patriot to complete plug and abandonment operations at Hudson wells. Positioned within radius of 61 15 38.99' North 00 42 33.20' East 2 and 61 15 11.08' North 00 44 09.40' East.
Show MoreMariners are advised that pre-sweeping activities will be taking place along the NeuConnect cable route. Works will be undertaken by Pre-Sweeping subcontractor Rohde Nielsen. The planned operations will be conducted by the vessels: • Njord R (TSHD) • Ask R (TSHD) • USS 202 (ROUV survey vessel)
Mobilisation of the Njord R, Ask R and USS 202 is anticipated from 24 April 2025 on site to commence pre-sweeping activities from 28 April 2025 onwards. The full scope of works are anticipated to take 5-6 months (weather dependent). Work is carried out from KP 78.9 (51º 48.2’ N 01º 38.0’ E) to KP 199.1 (52º 23.6’ N 02º 45.9’ E). Pre-sweeping activities between KP 78.9 to KP 145 are anticipated to be completed between 28 of Apr and beginning of June (weather dependent, it can take longer).
All vessels involved in operational activities will exhibit appropriate lights and day-time shapes prescribed by the International Regulations for Preventing Collisions at Sea, relative to operations. The vessel will also transmit an Automatic Identification System (AIS) message.
See detailed map on our bulletin website2 x Free Span identified on the Pipeline PL624/625 - 19.17m length x 0.89m height & 13.77m length x 4.11m height
624/625, block 53 SNS. All co-ordinates are based on International Spheroid 1924, European Datum 1950, Universal Transverse Mercator Zone 31N Projection, Central Meridian 3° E.
KP |
Easting |
Northing |
Water Depth |
Length |
Height |
|
5.303 |
447263.59 |
5870188.85 |
37.74 |
19.17 |
0.89 |
Freespan - Start |
5.322 |
447279.17 |
5870200.03 |
38.53 |
19.17 |
0.89 |
Freespan - End |
5.426 |
447363.15 |
5870260.33 |
43.11 |
13.7 |
4.11 |
Freespan - Start |
5.44 |
447374.39 |
5870268.16 |
37.72 |
13.7 |
4.11 |
Freespan - End |
During the campaign to lay and bury the Dogger Bank B export cable, it has been necessary to install rock berm protection over the cable in locations where it has not been possible to trench bury the cable.
Rock berm installation has been installed to an average height of approximately 1.6m above seabed level, which represents and average reduction in depth at Lowest Astronomical Tide (LAT) of approximately 6%.
See detailed map on our bulletin websiteThe offshore geotechnical survey of the proposed Mona Offshore Wind Project and Morgan Offshore Wind Project (Generation Assets) is currently paused due to a technical fault. The vessel is expected to be in port until ~23rd of April after which it will return to the Morgan array area. This will delay the survey works, which are now expected to be completed in early October (~10th October). The survey was previously expected to end ~30th September 2025.
The survey involves the drilling, sampling and coring of boreholes throughout the two Array Areas. The vessel will be stationary at each borehole location for 1 to 3 days, depending on borehole depth, to allow the samples and cores to be taken from the seabed. 24 hour and 7-day lookaheads will be provided, containing details of the positions of Horizon Geodrill.
An Offshore Fisheries Liaison Officer (OFLO) will not be present on board the vessel during the survey, but the project Fishing Industry Representative (FIR) and/or Company FLO (CLFO) can be contacted with any specific queries.
Contact details for the FIR and CFLO are provided in attached.
See detailed map on our bulletin websiteDeployment of an AquaNode Wave Buoy, moored with a block on the seabed with a mooring swing radius of <200m within the area defined. Colour: Bright Yellow Markings: High-visibility reflective tape, marked 'SURVEY' Dimensions: 75cm Ø x 39cm. (Summary and position amended 10/04/2025)
Show MoreTransit and final location of Heavy Lift Vessels (HLV) Scaldis Rambiz & Gulliver. Scaldis will commence the removal of the decommissioned installations the Hewett 48/29B and 48/29C in April 2024. There will be HLVs located at the 48/29B and 48/29C completing the removal of the installation's topsides and jackets and will be transiting from the port of Flushing to the location on the 13th of April. The HLV is expected to be on location at the 48/29B on the 13th of April as per the schedule below.
The schedule below provides an overview of the planned works for HLV Rambiz, HLV Gulliver and their supporting vessels for the removal of the 48/29B and 48/29C platforms This schedule does not include possible weather delays.
Mobilisation to Field 48/29B 13/04/2025
Interim Demob 23/04/2025
Mobilisation to Field 48/29C HLV Ramiz 01/05/2025
Modules transporting to Sagro 27/05/2025
Preparations 48/29C 17/06/2025
Transit to 48/29B 21/06/2025
Modules 1 shipping to Sagro 28/06/2025
Modules 2 shipping to Sagro 13/07/2025
Transit back to field 17/07/2025
48/29 C Topside Removal HLV Gulliver 06/08/2025
Topside shipping to Sagro 08/08/2025
Transit back to field 48/29B 11/08/2025
Topside shipping to Sagro 17/08/2025
Transit back to field 48/29B 19/08/2025
48/29B Jacket shipping to Sagro 27/08/2025
Interim Demob 29/08/2025
Transit back to field 48/29C 01/09/2025
48/29C Jacket shipping to Sagro 08/09/2025
Contingency Stub Removal 12/09/2025
Leg Stubs shipping to Sagro 16/09/2025
See detailed map on our bulletin websiteAfter each TP has been installed by the Jack-up Vessel (JUV), Seaway Ventus, Contractor shall perform the TP Completions Scope with the Norside Supporter (CSV), with a delayed start from Seaway Ventus. CSV shall operate on a single 12-hour shift for the duration of the project. ETA For works is Circa 25/04/2025.Bolting and Grouting operations will be conducted by the Norside Supporter within the East Anglia THREE offshore windfarm area.
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)
See detailed map on our bulletin websitePlease be advised that Partrac Ltd have completed maintenance on the Northern weather monitoring buoy, installed within the East Anglia Three Offshore Wind Farm Area.
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.
See detailed map on our bulletin websitePlease be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake geophysical surveys within the site boundary. Survey operations will be carried out by the Geosurveyor XI which is expected to arrive at site circa 18th April for 1 day then 1st June for 41 days. The geophysical survey scope will include Multibeam Echosounder (MBES), Side Scan Sonar (SSS) of all buried cables and a 300m2 area around jackets shown in the coordinates of the work site boundary.
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 arrive at site circa 18th April for 1 day then 1st June for 41 days (inclusive of weather downtime). 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 all buried cables and a 300m2 area around jackets shown in The coordinates of the work site boundary are presented in the below Table 1.
Table 1: Moray East Site boundary
Coordinates |
|||
Easting |
Northing |
Latitude |
Longitude |
515330.83 |
6464697.91 |
58° 19.378' N |
2° 44.296' W |
525198.17 |
6453175.00 |
58° 13.141' N |
2° 34.265' W |
525337.48 |
6443784.17 |
58° 8.080' N |
2° 34.184' W |
505117.13 |
6436034.64 |
58° 3.946' N |
2° 54.796' W |
509820.00 |
6445320.00 |
58° 8.945' N |
2° 49.990' W |
507393.03 |
6452043.96 |
58° 12.571' N |
2° 52.451' W |
512568.09 |
6458210.62 |
58° 15.887' N |
2° 47.147' W |
Geosurveyor XI |
|
Call Sign: |
2GRS3 |
MMSI: |
235099951 |
On Board Contact: |
+31 681131956 +32 485740290 |
Onshore Representative: |
John Elcoat +44 07356 224547 |
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Please 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)
The following contact can provide more information if required. Please note that specific queries can also be addressed to the relevant vessel or shore-based representative.
CONTACT DETAILS |
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Marine Coordination Centre 24/7 Peter Garden – Lead Marine Coordinator Email peter.garden@oceanwinds.com Tel : +44 07884630427 |
For fisheries related matters Alex Winrow-Giffin – Brown and May Marine Ltd. Email: alex@brownmay.com Tel : +44 1379 872148 / +44 7760 160039 |
2 x bottom mounted ADCPs to be deployed for a period of up to 6 months.
2 x current meters mounted on frames on the seabed, connected via leaded groundline to an anchored surface buoy within approximately 100m of the instruments.
See detailed map on our bulletin websiteFaults with NAV Aids and lighting
AIS - no AIS data for HS1, HS2, HS4 and HS5 - fault finding and repair to be conducted at earliest opportunity.
HS1 and HS4 - Nav aid lighting on the WTGs is faulty - fault finding and repair to be conducted at earliest opportunity.
HS1 has fault aviation lighting - fault finding and repair to be conducted at earliest opportunity.
See detailed map on our bulletin websiteThe DSV Boka Da Vinci will be completing decommissioning activities at B-Block. The vessel will be at B-Block from the 13th May for ~ 40 days. The vessel will be at Solan from the 24th April for ~ 20 days then will return once the B-Block scope is completed on the 19th June for 50 days.
The DSV Boka Da Vinci is due to mobilise in Aberdeen on 24th April to undertake a 110 day offshore campaign to execute the Decommissioning scopes at Solan and B Block within the Central North Sea. The vessel will be working at Solan and B-Block 500m safety zones. Upon completion of the offshore campaign, the vessel will demobilise in Aberdeen. During port calls for Solan, the vessel will utilise Lerwick, Shetland.
See detailed map on our bulletin websiteThe DSV Boka Da Vinci will be completing decommissioning activities at Solan. The vessel will be at B-Block from the 13th May for ~ 40 days. The vessel will be at Solan from the 24th April for ~ 20 days then will return once the B-Block scope is completed on the 19th June for 50 days.
The DSV Boka Da Vinci is due to mobilise in Aberdeen on 24th April to undertake a 110 day offshore campaign to execute the Decommissioning scopes at Solan and B Block within the Central North Sea. The vessel will be working at Solan and B-Block 500m safety zones. Upon completion of the offshore campaign, the vessel will demobilise in Aberdeen. During port calls for Solan, the vessel will utilise Lerwick, Shetland.
See detailed map on our bulletin websitePlease be advised that the crew transfer vessel ‘NR Rebellion’ is expected to mobilise in the port of Lowestoft circa 01/04/2024
Crew Transfer Vessel NR Rebellion will provide assistance during the construction phase of the East Anglia Three Offshore Windfarm Array and will make regular transits between East Anglia Three CDM and the ports of Lowestoft and Great Yarmouth. Outer Thames Estuary Special Protection Area (SPA) As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA), during construction of EA3. It is anticipated that vessels which are transiting to Lowestoft and Great Yarmouth ports, such as for crew transfer operations, will transit through and/or in proximity to the Outer Thames Estuary SPA. These areas shall be as far as practicable be avoided during transit from 01st November to 31st March
See detailed map on our bulletin websiteDeployment of an AquaNode Wave Buoy, moored with a block on the seabed with a mooring swing radius of <200m about the location given. Colour: Bright Yellow, Yellow flashing light: Fl 5 Y 20s 2M, Markings: High-visibility reflective tape, marked 'SURVEY' Dimensions: 75cm Ø x 39cm.
Show MoreMultiple vessels will be carrying out ROV survey, boulder clearance, pipelay, trenching and pipe burying operations along the Rosebank Development pipeline route between the charted Rosebank Development Area and the WOSPS Tie-in Safety Zone. Other vessels are requested to keep safe distance.
Show MoreA tethered meteorological weather buoy will be installed at the given coordinates. Vessels are requested to keep safe distance.
Show MoreMultiple vessels will be carrying out pipeline and subsea structure installation activities within the charted Rosebank Development Area. Other vessels are requested to keep safe distance.
Show MoreOuter Dowsing Offshore Wind Farm 2025 Offshore Geotechnical Borehole Survey
Outer Dowsing Offshore Wind (a joint venture between TotalEnergies, Corio Generation and Gulf Energy) are conducting a 3.5 month offshore geotechnical survey between 28th April and 08th August 2025 using the vessel Dina Polaris call sign: CQOF. The survey vessel shall be conducting geotechnical boreholes at various locations within the proposed offshore wind farm area. The vessel will typically spend one to two days static at each sample location within the area so please allow a safe distance.
Company: Outer Dowsing Offshore Wind
Contractor: Geoquip Marine Operations AG
Survey Vessel: Dina Polaris
Survey Vessel call sign: CQOF
Earliest Start date: 28th April 2025
Latest Finish date: 8th August 2025
See detailed map on our bulletin websiteAll mariners and stakeholders are advised that seabed preparation activities will commence within the Inch Cape Offshore Wind Farm and export cable corridor.
On behalf of Inch Cape Offshore Ltd, N-Sea will commence seabed preparation activities within the wind farm site boundary and its export cable corridor on or around the 30th of March 2025.
Seabed preparation will include the relocation of any boulders and the identification and mitigation of any unexploded ordnance (UXO) which may affect the installation of offshore structures, inter-array cables and export cables.
The boulder relocation vessel, FS Aries is expected to arrive at the work site on or around the 30th of March with the UXO identification & mitigation vessel,
4-Winds arriving on or around the 4th of April.
Works are expected to be completed by November 2025.
See detailed map on our bulletin websiteAll Mariners are advised that the Nearshore vessel Seafast Don (Call-Sign MMMD6) and MV Survey Vessels Vos Gorgeous (Call-Sign 2HEN8) and Ocean Marlin (Call-Sign LAWV8) will be performing a programme of survey works off the coast of East Anglia operated by Sulmara Subsea Limited on behalf of their client, Scottish Power Renewables.
The survey work consists of 3 different phases with all 3 vessels mobilising at different periods and will operate simultaneously however the total expected duration for all the works with all 3 vessels is approx. 100 days. Operations will comprise the following phases:
- Phase 1 – Nearshore and Offshore Surveys comprising a towed array of hydrographic survey equipment approx. 150m in length within the boundary coordinates outlined within this notice. This phase is expected to last approx. 74 days in total.
- Phase 2 – Environmental Survey within the same boundary coordinates at the later end of the period comprising various stationary elements. This phase follows on from Phase 1 and is expected to last approx. 12-15 days in total.
- Phase 3 – ROV survey within the same boundary coordinates at the later end of the period – most likely to be the same vessel as in Phase 2. This phase follows on from Phase 2 and is expected to last approx.. 14-18 days in total.
Both offshore vessels will operate 24hrs whilst the nearshore vessel will operate 12hr days exclusively within the 12nm zone.
See detailed map on our bulletin websiteMariners are advised that the Jack Up Vessel Seaway Ventus will commence monopile and transition piece installation operations within the East Anglia THREE offshore windfarm area circa the 27/03/2025. Operations will be conducted by Seaway 7 and the main working area will be inside the CDM Zone of the wind farm array.
Seaway Ventus will install 95 monopiles and transition pieces at the WTG locations set out in attached East Anglia Three Notice To Mariners 012 /2025. During the monopile and transition piece installation campaign, all vessels are requested to keep a 500m safety distance from the Seaway Ventus. It is currently anticipated that weather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week)
During operations, the ‘Seaway Ventus’ will have restricted manoeuvrability as defined under COLREGS (International Regulations for Preventing Collisions At Sea, 1972). They will display the appropriate day shapes and lights and will transmit an Automatic Identification System (AIS) message.
See detailed map on our bulletin websiteMariners are advised that Fraunhofer IWES has deployed a Floating Lidar System (FLS) next to the NOAH (National Offshore Anemometry Hub), 3NM off Blyth. The ODAS buoy was moored on the 1st November 2024 and is now expected to stay at its deployed position until August 2025.
Show MoreMariners are advised that Orsted Hornsea Project Four (UK) Limited (hereafter ‘Orsted’) located within the UK Sector of the North Sea, off the coast of East Yorkshire. will be commencing a scope of geophysical survey works in late March/April 2025.
The geophysical survey will include Multibeam Echosounder (MBES)/ Backscatter, Side Scan Sonar (SSS), Magnetometer (MAG), Innomar sub-bottom profilers (SBPs) and an Ultra-short baseline (USBL) acoustic positioning system will be used to calculate the position of underwater targets.
The geophysical survey works will be conducted by the following 3 survey vessels. “Ocean Endeavour”, “Titan Endeavour”, and “Ocean Researcher” as well as one support vessel “GV Jacoba”. The mobilisation of the first geophysical vessel will start 14th March 2025 and the survey operation will commence from around 1st April 2025. The works are expected to last approximately 180 days, including weather downtime. The exact survey dates are subject to mobilisation time, weather and work progress.
See detailed map on our bulletin websiteFrom 01 April 2025 companies of the East Channel Association (ECA) will be undertaking geophysical and seabed grab surveys of aggregate dredging areas in the East Channel dredging region.
Show MoreMetocean buoy installed at the Victory development area. Buoy is floating on surface with mooring consisting of steel ballast. Note that buoy can move up to 150 m around deployment location. Deployment vessel: MS Elisabeth Duration: 6 months
Markers:
Metocean buoy
Character: Fl (5) Y 20s
Color: Yellow disc
Mooring: 3000 kg steel ballast with chain
Buoy diameter: 3 m
AIS base station address: 1328842/1/Shell Victory Wave Buoy WS154
See detailed map on our bulletin website
Mariners are hereby advised that circa the 01/03/2025 the guard vessel Tess will commence guard duty operations at the East Anglia Three Offshore Windfarm area set out in section 2 of the attached Notice to Mariners.
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.
See detailed map on our bulletin websitePlease be advised from circa 1st November 2024 East Anglia Three Offshore Windfarm construction works will commence, subsea boulder and debris clearance operations will be the first construction activity as per the attached NTM document. Followed by Scour protection Installation circa 05th November 2024 as per NTM 050 in attachment.
East Anglia THREE will be a large offshore wind farm, located 69 km off the Norfolk coast. With a projected capacity of approximately 1400MW, the wind farm shall supply electricity to approximately one million UK homes. Onshore construction for the project started in July 2022.
By use of multiple specialized offshore vessels,1 Offshore Convertor station (OFCS) & 95 offshore wind turbine generators (WTGs) will be installed within the East Anglia Three site boundary along with the associated inter array and export cables. The generated power will be transmitted via an installed External Cable (EC) from the OFCS to a shore side substation located in Bramford.
See detailed map on our bulletin websiteThis notice is to advise that Green Rebel has installed one (1) Floating LiDAR System (FLS) buoy at the OREC National Offshore Anemometry Hub (NOAH), approximately 3 nautical miles off the coast of Blyth, Northumberland for a minimum period of 6-months.
Show MoreDuring 14th January recovery ops, the seabed mounted echosounder and clump weight could not be located/recovered. A search was carried out across ~500m x 400m around deployed position with high resolution echosounder but could not locate items; these may have been dragged to another location. Remains of the anchor (chain links) for FLiDAR 1 could also not be found/recovered. These items are presumed lost but could potentially be a snag risk to fishermen, however do not pose a risk to navigation.
Echosounder and clump weight
A seabed mounted frame (1.6 x 1.6 m x 0.8 m, 350 kg) with echosounder inside was deployed in approx. 91 m water depth on 19th July 2024. The frame was connected with a ground line to a mooring weight/anchor (2,000 kg), which was attached to a standard spherical blue surface marker buoy with a riser to mark its position. The surface marker buoy was not visible at time of recovery operations so is thought to have broken free from the clump weight.
Photos of the echosounder frame, clump weight and surface marker buoy are attached.
The frame was designed to be overtrawlable however the clump weight was not so could pose a snag hazard.
FLiDAR 1 anchor
In April 2024, the FLiDAR buoy broke its mooring; the clump weight for this was made up of several ~1m long lengths of heavy chain bound together with a smaller chain (photo of similar set-up attached as an example). The buoy and mooring were recovered, and subsequent inspection onshore showed that the chain binding the links of heavy chain had come apart as the FLiDAR was dragged, leaving the heavy chain lengths on the seabed. These are expected to have sunk into the seabed sediment and/or have dispersed from original location. Consequently, these links of chain are not considered to pose a snag risk.
Locations of these items are in table below but note that these are deployed locations and they could have moved/been dragged from these points.
Lost item |
|
Latitude |
Longitude |
FLiDAR 1 anchor |
DMS |
57°36′28.8” N |
1°13′37.2” W |
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DDM |
57°36.480′ N |
1°13.620′ W |
Echosounder |
DMS |
57°36′17.7” N |
1°13′36.5” W |
|
DDM |
57°36.295′ N |
1°13.609′ W |
Echosounder clump weight |
DMS |
57°36′19.6” N |
1°13′37.9” W |
|
DDM |
57°36.326′ N |
1°13.631′ W |
See detailed map on our bulletin website
The cut-point of PL24 is exposed and is protruding significantly from the seabed; approximately 18m long and 6m high. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.
The cut-point of PL24 is exposed and is protruding significantly from the seabed; approximately 6m from the seabed at its highest point and overhanging approximately 18m long from where the line makes contact with the seabed again. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.
See detailed map on our bulletin websiteGalloper Windfarm, RWE - NTM: GWFL-O&M 03-2020 v2 Risk of cable exposure within the Galloper Windfarm
Please be advised that the subsea survey carried out in 2020, identified seven cable routes with 10 exposures in total. The below table provides the locations of the identified exposures.
As cable exposure is a known risk at Galloper and across the offshore wind industry, we would remind Mariners of the safety information found on the KIS-ORCA website ‘The risks of fishing near cables and renewable energy structures. To avoid crossing cables when towing equipment follow the cable corridors- locations of the cables can be found on the Galloper awareness charts via KIS-ORCA.
See detailed map on our bulletin websiteGalloper Windfarm, RWE - NTM: GWFL-O&M 03-2020 v2 Risk of cable exposure within the Galloper Windfarm
Please be advised that the subsea survey carried out in 2020, identified seven cable routes with 10 exposures in total. The below table provides the locations of the identified exposures.
As cable exposure is a known risk at Galloper and across the offshore wind industry, we would remind Mariners of the safety information found on the KIS-ORCA website ‘The risks of fishing near cables and renewable energy structures. To avoid crossing cables when towing equipment follow the cable corridors- locations of the cables can be found on the Galloper awareness charts via KIS-ORCA.
See detailed map on our bulletin websiteAEC-1 Cable System break has been repaired but the Post Repair Inspection and Burial (PRIB) operation has not been completed. Hence, a section of approx. 1.5km of cable is sensitive to any external impacts and constitutes a snagging risk for anchoring, fishing gear or other equipment with seabed intervention. Please keep a distance of 500m.
Show MoreMariners are advised that Orsted Hornsea Project Four (UK) Limited (hereafter ‘Orsted’) will be commencing a scope of geotechnical survey works in February 2025. The surveys are being undertaken to perform geotechnical seabed investigations, including undertaking boreholes and CPT’s, for the Hornsea Project Four Offshore Wind Farm (‘Hornsea Four’) project, located within the UK Sector of the North Sea, off the coast of East Yorkshire.
The geotechnical survey works will be conducted by the following 3 survey vessels. “Connector”, “Geoquip Saentis”, and “Geoquip Seehorn” as well as one support vessel “GV Independent”, starting from 10th February 2025. The works are expected to last approximately 170 days, including weather downtime. The exact survey dates are subject to mobilisation time, weather and work progress.
Hornsea Four does not request any fishing gear to be cleared as the proposed activities intend to work around any fishing gear encountered. If gear is directly obstructing a sample location, Orsted may request gear relocation though this will be avoided where possible.
The contents of this notice are based upon our current understanding of Hornsea Four’s requirements
See detailed map on our bulletin websiteHarbour Energy are performing a drilling campaign using the V120 Jack-Up drilling at the Judy Riser Platform location in block 30/07a. The Judy installations have a dedicated Emergency Response and Rescue Vessel (ERRV) on location monitoring the surrounding area.
Show MoreThe Victory Project consists of the development of the Victory Subsea gas field as a single well tie-back to the Shetland Gas Plant. An Offshore Development Area has been put in place during the construction phase based upon the planned location of the Victory PLEM (North) between May 2024 and September 2025. The offshore development area for Victory Project was granted on the 20th March 2024. (see Schematic drawing att.)
UKCS Block ID: 206/4a, 206/5c and 207/1a
Water Depths refer to Lowest Astronomical Tide (LAT) with all depths quoted in metres – 126m – 296m
No visible marker (marker buoys) will be deployed.
See detailed map on our bulletin websiteValaris V121 MODU jack-up rig will be situated over Shearwater Alpha platform. Valaris V121 MODU will be on location at Shearwater until June 2026.
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