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Nearshore Dredging and Dredge Area Maintenance - Southern North Sea
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore dredging and dredge area maintenance campaign in the southern North Sea, utilising seven vessels. These vessels will be mobilising from the port of Hartlepool and working 24hrs a day.
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore dredging and dredge area maintenance campaign in the southern North Sea, utilising seven vessels. These vessels will be mobilising from the port of Hartlepool and working 24hrs a day.
The scope will include removal and temporary storage of dredge material within the NEP Pipeline and Cable Construction Area Block 1. Relevant permissions in place are provided in Section 2
The vessels are estimated to arrive on location on ~27 March 2026. Initial dredging activity is expected to take 71 ~ days to complete (weather dependant) and continued monitoring and maintenance of the dredge area will continue until pipelay activities begin. Updates will be issued via regular NEP Notice of Operations during the activity.
Mariners are advised to maintain a safe distance (of at least 500m) from vessel locations at all times.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7.
See detailed map on our bulletin website
Pressure testing of Gas Export Line System at the BP WOSPS location
The Deep Explorer will be completing pre-commissioning activities – namely Pressure testing of Gas Export Line System – at the BP WOSPS location
Pressure testing of newly installed gas export pipeline
Connect downline from vessel into gas export PLEM and pressure test with filtered dyed seawater
See detailed map on our bulletin website
Marine growth and mooring line survey - Alba FSU
In preparation of decommissioning (sail away) of the Alder FSU Survey will comprise: drop camera/video transects, grab sampling for of marine growth from infrastructure for analyses
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Pre-decommissioning Environmental Survey - Alder Field
In preparation of decommissioning of the Alder field, pre-decommissioning environmental survey. Survey will comprise: side scan sonar (SSS) and mutli-beam echo sounder (MBES), drop camera/video, grab sampling for chemical and faunal analyses.
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Hazardous structure - Frigg
Large t-section frame of approximately 14 x 7 meters has been located during an ROV seabed inspection. Debris removal and as-left survey is scheduled in March / April 2026 (weather dependant). The IMR vessel Seven Viking (Call sign LCPX) will be used for this scope
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UXO Identification Survey - Liverpool Bay
Mariners are advised that Liverpool Bay CCS Ltd will be undertaking UXO identification survey activities using the vessels Titan Discovery & Ocean Geograph
An Unexploded Ordinance (UXO) Investigation will be carried out in the Eastern Irish Sea to identify potential UXO targets (pUXO) along the Liverpool Bay CCS Cable Construction Area (See Figure 1 and Table 1 below).
The UXO corridor has been divided into three separate Blocks to enable clear engagement and communications to all relevant stakeholders.
Block 1 – Intertidal to Welsh Channel
Block 2 – Nearshore
Block 3 – Offshore
The Titan Discovery will work within Blocks 1 -2 and the Ocean Geograph will work Blocks 2-3 offshore.
The positions of any targets identified as confirmed Unexploded Ordinance (cUXO) will be shared within a separate notice and posted as a hazard on the Kingfisher Bulletin Service.
The vessels are estimated to arrive on location ~17 March working 24 hours a day for ~ 28 days.
Mariners are advised to always maintain a safe distance (of at least 500m) from the Titan Discovery & Ocean Geograph.
For further information, contact details for the Company Fisheries Liaison Officers are provided below and in section 7 of the attached notice.
See detailed map on our bulletin website
Rosebank Field Drilling Operations
The Odfjell Drilling Deepsea Atlantic Mobile Drilling Rig will be conducting operations in the Rosebank field development area.
The Odfjell Drilling operated Deepsea Atlantic mobile offshore drilling rig will be conducting drilling and well operations in the Rosebank field development area over various subsea templates for a period of approximately 18 months.
The rig will be operating on DP, therefore there will be no moorings deployed.
Deepsea Atlantic call sign is 2CEV5.
See detailed map on our bulletin website
Failure of Navaid on Dunlin Alpha
Full functionality has now been restored to the Navaid on Dunlin Alpha. Notice withdrawn.
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Freespan - PL370 Abandoned Thames Pipeline
Free Span identified on the Abandoned Thames Pipeline PL 370 - 41.42m long x 0.83m High
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Freespan - PL370 Abandoned Thames Pipeline
Free Span identified on the Abandoned Thames Pipeline PL 370 - 27.02m long x 0.83m High
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WAD Umbilical Changeout - Trencher
The North Sea Enabler will be trenching along this route to aid in the installation of a new umbilical cable between the Bruce CR platform and the WAD manifold. The trencher is expected to be in the field at the earliest 05/04/26 and for 7 days.
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Decommissioning - Pickerill A
The OBANA Heavy Lift Vessel will undertake jacket removal activities at the Pickerill A installation.
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Subsea Decommissioning Dana Western Isles
Dana Petroleum (E&P) Limited have contracted Helix Energy Solutions (Well Ops) to carryout Well Operations at Western Isles decommissioning project using the MSV Well Enhancer at the North and South Drill Centres in April 2026.
The Harris and Barra fields and located in Block 201/24a of the UKCS, 160km to the East of Shetland and apprcximately 500km North- North East of Aberdeen. The water depth in the area varies from approximatety 150msw to 165msw. The Western Isles production storage and offshore vessel (FPSO) has been been disconnected and no longer in the area. The Well Enhancer will be working on Wells at the North and South Drill Centres with ROV support, plus possible diving operations if required. There will be SIMOPS with the CSV Boka Nothern Ocean that will be in the Dana Western Isles area carryout decommissioning operations with ROV only support.
See detailed map on our bulletin website
Umbilical Changeout - Bruce CR platform and the WAD Manifold
The Seven Atlantic will be along this route installing a new umbilical cable between the Bruce CR platform and the WAD manifold. The DSV is expected to be in the field at the earliest 01/04/26 and for 21 days.
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Environmental Survey - Miller
Environmental and Geophysical survey operations carried out by the vessel A78-02, on behalf of bp, shall commence approximately 29th of December. Survey operations are expected to last a duration of 7 days subject to any delay due to adverse weather.
A78-02 shall be conducting an environmental survey in the Don Field. The survey shall comprise:
- ROV based geophysical surveys at approximately 1.5 knots using multibeam echosounder and sidescan sonar. This survey shall cover the former 500m zone and pipeline corridor between Don and Thistle.
- Environmental survey, of up to 24 stations. At each station the vessel shall complete ROV video transects and grab samples.
- ROV general visual inspection at the former Don Platform location.
Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre.
See detailed map on our bulletin website
Multibeam Echosounder Survey - EQ26999 - Statfjord Field
Multibeam Echosounder Survey (MBE) EQ26999 is to check on installed infrastucture condition for the Statfjord Field that is going to be closed / partly closed in the coming years.
The MBE Survey will be carried out by the M/V "Ocean Resolution". Threre will not be a towed array used during the survey acquisition. Survey equipment will be through use of hull mounted MBE only. This means the survey vessel has full ability to manouvere with the exception of the areas of Statfjord Platforms A, B and C + the loading areas for Statfjord A & B.
The survey area is approximately 140 - 150 meters depth apart from the Northern part where is deepens to 240 meters.
The duration of the survey is estimated at 5-7 effective days + possible weather stand-by.
Call sign: MKRE5
IMO: 9779446
Vessel Phones: +44 20 3868 2072 / 2085 / 2073
VHF: Channel 16
See detailed map on our bulletin website
Replacement of damaged tethered weather buoy - Rosebank Wave Rider Buoy
The vessel Deep Explorer will mobilise to be on location to replace the weather damaged buoy. The replacement buoy will be deployed at the same location as the original buoy
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Weather Buoy Installation – Rosebank Offshore Development Area
A tethered meteorological weather buoy is installed at the given coordinates. Vessels are requested to keep safe distance.
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Confirmed Unexploded Ordnance NEP Construction Area
Mariners are advised that following a UXO identification survey the vessel Olympic Taurus has identified a confirmed UXO within Block 3 of the NEP Construction Area. Further investigations are being conducted and updates will follow.
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Debris Survey within 500m Safety Zone Breagh Alpha
To carry out a survey of the area around the Breagh Alpha platform, to ensure the pads for the drilling rig are still viable.
The Debris Survey is to include Multibeam Echosounder (hull mounted), Side Scan Sonar and Scanfish with 2 mags (both towed) covering a 200 m x 200 m area adjacent to the North side of the Breagh alpha platform (i.e. rig approach side) – expected duration is less than 1 day and within the Breagh 500m zone. This was due to be carried out in January but due to weather conditions was cancelled, until another vessel was available.
See detailed map on our bulletin website
Disconnection of Christmas Trees (XT) at Strathspey Manifold Structure
CNRI plan to disconnect 12 subsea wells located at the Strathspey Production Manifold (SMS). The XT disconnections will be carried out by a Light Well Intervention Vessel (LWIV) , Seawell, using divers, as part of preparations for upcoming Plug and Abandonment (P&A) activities later in Q2 2026.
The proposed scope of work includes downhole flushing (no discharges to sea) of XT pipework and jumpers, disconnection of XTs, and performing barrier testing on isolation valves at each XT.
In addition, PL870B (Water Injection Pipeline to Strathspey) will be disconnected at the SMS.
This is in preparation to support the final decommissioning at a later date.
Location – 60 55 37.04 North, 01 42 18.26 East
See detailed map on our bulletin website
FPSO & moorings decommissioning - Western Isles
The Western Isles FPSO and mooring lines have been removed. During 2026 the mooring piles will be cut and recovered.
The mooring piles will be cut below seabed level and the cut sections recovered.
See detailed map on our bulletin website
Decommissioning - Amethyst A1D
The OBANA Heavy Lift Vessel will undertake jacket removal activities at the Amethyst A1D.
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Decommissioning - Pickerill B
The OBANA Heavy Lift Vessel will undertake jacket removal activities at the Pickerill B installation.
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Decommissioning - Wenlock
The OBANA Heavy Lift Vessel will undertake topside and jacket removal activities at the Wenlock installation.
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Removal of Cardinal Buoys & Presence of Guard Vessels - Pickerill A
The four cardinal buoys at Pickerill A will be removed by a support vessel, prior to the arrival of the OBANA for the jacket removal activities. A guard vessel will be deployed to provide navigation safety. The guard vessel will come into operation as soon as the first buoy is removed, and it will remain on location until the OBANA is in position at Pickerill A, at which point the OBANA’s aids to navigation system will take precedence.
Prior to the arrival of the OBANA for the jacket removal activitvies, the four cardinal buoys at Pickerill A will be removed by a support vessel. The navigation aids on the Pickerill A jacket will not be reinstated as they are not functioning and access to the jacket is not possible. The removal is planned to commence on 10th March 2026 and expected to take 2 to 3 days to complete.
As the OBANA will not be on location, a guard vessel will be deployed to provide navigation safety. It will monitor the marine traffic and will intercept any errant vessels. The guard vessel will come into operation as soon as the first buoy is removed, and it will remain on location until the OBANA is in position at Pickerill A, at which point the OBANA’s aids to navigation system will take precedence.
Based on current rig planning, to OBANA will be on location at the earliest on 12th March 2026. However this could be delayed due to operational and weather challenged. Therefore, the guard vessel may need to be active for up to ten days.
See detailed map on our bulletin website
Seismic OBN Survey - Jackdaw
Adura are planning to undertake an ocean bottom node (OBN) seismic survey in the central North Sea, covering United Kingdom Continental Shelf (UKCS) Blocks 23/27, 30/1-3, 30/7-8, and Norwegian Blocks 007/11 & 001/2. The campaign will last 45 days in total but have included contingency in the event of bad weather.
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Western Isles infield subsea infrastructure decommissioning
Infield pipelines and manifolds associated with the Western Isles Development will be decommissioned
Risers, tie-in spools, manifolds and mid-water arches will be recovered from the seabed. The surface laid pipeline bundles serving the North and South drill centres will remain in place until a decommissioning option is finalised. Wellheads will be left in place with existing fishing protection structures subject to a separate well plug and abandonment campaign, which will commence in 2026.
New rock armour will be deposited to protect exposed pipeline bundle ends at the North and South Drill Centre and North and South Riser Base locations.
Work will re-commence from 15th March 2026.
See detailed map on our bulletin website
Geophysical & Environmental Survey
Geophysical & environmental survey at various locations in the Southern North Sea. The proposed surveys will utilise the N-Sea Pathfinder vessel and include a combination of bathymetric multibeam echosounder (MBES), side scan sonar (SSS) and magnetometer, benthic grabs and camera drops.
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Noble Intrepid at BC39
Please be advised that the Jack-up rig 'Noble Intrepid' is at this location, and will remain in this position for up to 90 days.
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Pre-Decommissioning activities - Leman Southwest
Perenco will be on location to carry out pre-decommissioning activities using the Multipurpose Service Vessel (MSV), the Wagenborg Kingsborg.
The pre-decommissioning activities will prepare the location in advance of the well P&A activity in Q2 2026. Expected date to be on location is 22nd March for 4 days.
See detailed map on our bulletin website
Nearshore UXO Identification - Clearance & Geological Sediment Sampling
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore Unexploded Ordnance (UXO) investigation survey in the southern North Sea, utilising divers. The survey will be conducted by the vessel DSV Curtis Marshall.
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore Unexploded Ordnance (UXO) investigation survey in the southern North Sea, utilising divers. The survey will be conducted by the vessel DSV Curtis Marshall (see section 6)
The scope will include targeted investigation of potential UXO targets within NEP Pipeline and Cable Construction Area Block 1 (see Figure 1 and Table 1 below) in water depths of ≤10 m. Where required, clearance activities will be undertaken. Clearance methods may include deflagration (low-order disarming), and the relocation of debris away from the pipeline route and associated exclusion zone. In addition, the vessel will undertake nearshore sediment sampling within the same work area. Relevant permissions in place are provided in Section 2.
The vessel is estimated to arrive on location on ~10 March 2026.The investigation is expected to take ~14 days to complete (weather dependant)Mariners are advised to maintain a safe distance (of at least 500m) from the survey vessel locations at all times.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7.
See detailed map on our bulletin website
Metocean Buoy Installed - Penguins Area
There are two yellow buoys linked with a 10 m rope. The smaller buoy has an LED light.
Wave buoy
Model: Sofar Spotter Buoy
Diameter: 0.43 m
Colour: yellow
LED light: 0.5s flash every 2.5s with a visibility of at least 1 nm.
Mooring buoy
Model: Sealite SL-MB-1000
Diameter: 1 m
Colour: yellow
See detailed map on our bulletin website
Well Intervention works at Magnus Swift and South Magnus
The MSV Well Enhancer will be carrying out LWI & diving operations in the Magnus South and Swift Fields.
The MSV Well Enhancer has been contracted by EnQuest to carry out a Plug & Lubricate campaign on the Magnus South and Swift wells F9, F10, F1, F2 and F3, with sat diving services in support of LWI operations.
See detailed map on our bulletin website
Decommissioning Activities - Grove G5, Seven Seas and Grove Deep
The Edda Freya will mobilise to the Grove G5 (49/10a-4), Seven Seas (48/7c-13y) and Grove Deep (49/10a-9) well locations to undertake decommissioning activities on or around the 4th March 2026. This date is subject to change depending on weather and operational requirements. Operations are expected to take a total of 16 days and to be complete by 1st April 2026.
The Edda Freya CSV will mobilise to the Grove G5 (49/10a-4), Seven Seas (48/7c-13y) and Grove Deep (49/10a-9) well locations to undertake decommissioning activities on or around the 4th March 2026. This date is subject to change depending on weather and operational requirements. Operations are expected to take a total of 16 days and to be complete by 1st April 2026.
See detailed map on our bulletin website
Pre-laying of anchors at Cladhan - in preparation for Noble Patriot arrival
Pre-laying of anchor at Cladhan - in preparation for Noble Patriot arrival, as detailed within WIA/1885 CL/1588. 8 x anchors to be placed within radius of 61 08 53.92 North 00 47 13.62 East.
Pre-laying of anchor at Cladhan - in preparation for Noble Patriot arrival, as detailed within WIA/1885 CL/1588.8 x anchors to be placed within radius of 61 08 53.92 North 00 47 13.62 East.
See detailed map on our bulletin website
GPIII Donan / Dunbarton Field Diving Works
NEO NEXT Ltd intends to undertake diving works in the DCC Manifold 500m Safety Zone with commencing 06 March 2026
The workscope comprises of a Dive Support Vessel (DSV) performing the flushing, isolation and reconfiguration of the P12 & P18 Wells within the DCC Manifold 500m Safety Zone.
The DSV will be positioned within the DCC Manifold 500m Safety Zone for the duration of the 10 day scope.
The earliest start date for operations to commence is 06th March 2026 with the operations expected to last for approximately 10 days. The operations will be undertaken from the Dive Support Vessel (DSV) Seven Kestrel.
See detailed map on our bulletin website
Survey Activity - Skerryvore
Fugro Searcher to undertake high res 2D seismic survey at proposed drilling location.
Survey works to last 14 - 21 days.
A single solid streamer of approximately 1,350 m in length will be towed behind the survey vessel during the 2DHR seismic operations.
See detailed map on our bulletin website
Environmental Survey - Don
Environmental and Geophysical survey operations carried out by the vessel A78-02, on behalf of bp, shall commence approximately 29th of December. Survey operations are expected to last a duration of 7 days subject to any delay due to adverse weather.
A78-02 shall be conducting ROV based geophysical surveys at approximately 1.5 knots using multibeam echosounder and sidescan sonar. The survey shall also comprise an environmental survey, of up to 12 stations. At each station the vessel shall complete ROV video transects and grab samples
Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre.
See detailed map on our bulletin website
FPSO Location - Rosebank Field
Survey vessel "Skandi Vega" will survey the wet stored anchors / mooring chains prior to the FPSO arrival
Survey vessel Skandi Vega will survey at the FPSO moored position all wet stored anchors and mooring chains prior to the FPSO arrival and subsequent hook up. These anchors are within the Rosebank development area.
All vessels are requested to give the "Skandi Vega" a wide berth as vessel will be operating within a radius of 2.0 nm of this given position.
See detailed map on our bulletin website
Survey Activity - Bruce Field
Fugro Searcher to undertake high res 2D seismic survey at proposed drilling location.
Survey works to last 14 - 21 days.
A single solid streamer of approximately 1,350 m in length will be towed behind the survey vessel during the 2DHR seismic operations.
See detailed map on our bulletin website
East Brae Decommissioning works
TAQA (duty holder) of East Brae will be conducting decommissioning activities at the East Brae.
TAQA (duty holder) will be conducting decommissioning activities at the East Brae installation commencing between the 12th of May 2026 and 11th June 2026 for circa 60 days. This work will include preparation works for Topside and Conductor removals.
Vessels will be operating within the 500m safety zone of the platform and on occasion, will be at stand-by, near to the boundary of the 500m zone.
Vessels in attendance will be the Balder and Sleipner for the work scopes.
The ERRV Vos Traveller will be performing standby duties.
See detailed map on our bulletin website
NEP Pre- Construction Activities Nearshore Geophysical Survey
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore Geophysical survey using the vessel Seafast Don
The survey vessel will utilise Multibeam Echosounder (MBES) within the NEP Pipeline and Cable Construction Area Block 1 & Block 2 only (See Figure 1 and Table 1 of the attached NtM) for an estimated period of ~14 days (weather dependant)
The vessel is estimated to arrive on location ~ 28th February working 24 hours a day.
Mariners are advised to always maintain a safe distance (of at least 500m) from the Seafast Don.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7of the attached NtM.
See detailed map on our bulletin website
NEP UXO Identification and Boulder Re-Location - Olympic Taurus
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking UXO Identification and Boulder Re-location activities using the vessel Olympic Taurus within NEP the Pipeline and Cable Construction Area Blocks 1 to 5.
Activity 1: An Unexploded Ordinance (UXO) Investigation survey utilising an ROV (Remote-Operated Vehicles)
The survey will carry out targeted investigations of potential UXO targets (pUXO) within NEP Pipeline and Cable Construction Area Blocks 1 to 5 (See Figure 1 and Table 1 in the attached notice) >10m water depth.
The positions of any targets identified as confirmed Unexploded Ordinance (cUXO) will be shared within a separate notice and posted as a hazard on the Kingfisher Bulletin Service.
The vessel is estimated to arrive on location ~27 February working 24 hours a day for ~ 45 days.
Activity 2: Once the UXO identification campaign is completed the Olympic Taurus will begin a targeted Boulder Re-location campaign > 10m water depth within NEP Pipeline and Cable Construction Area Blocks 1 to 5. An update to this notice will be provided once this activity is schedule to begin along with any re-defined boulder re-location activity area coordinates.
Mariners are advised to always maintain a safe distance (of at least 500m) from the Olympic Taurus.
The position and extent of the NEP Pipeline and Cable Construction Area Blocks (See Figure 1 and Table 1 in the attached notice) are currently under review and will be updated once the review is complete.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided within this bulletin.
See detailed map on our bulletin website
Southern North Sea - Offshore ROV, UXO ID & Clearance
Mariners are advised that the Northern Endurance Partnership (NEP) offshore Unexploded Ordinance (UXO) Investigation & Clearance, within the southern North Sea will resume on the 1st March (weather dependant), the Glomar Wave will now continue the investigation.
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking an offshore Unexploded Ordinance (UXO) Investigation survey utilising ROV (Remote-Operated Vehicles) within the southern North Sea. The survey will be conducted by the vessel Glomar Wave (see section 6 of the attached notice)
The survey will carry out targeted investigations of potential UXO targets and conduct clearance of the targets if required within NEP Pipeline and Cable Construction Area Blocks 1 to 5 (See Figure 1 and Table 1 within the attached notice) >10m water depth. The position and extent of the NEP Pipeline and Cable Construction Area Blocks are currently under review and will be updated once the review is complete.
The positions of any targets identified as potential Unexploded Ordinance (pUXO) will be shared within a separate notice and posted as a hazard on the Kingfisher Bulletin Service.
The vessel is estimated to arrive on location on the 1st March, working 24 hours a day. The investigation is expected to take ~ 60 days to complete (weather dependant)
Mariners are advised to maintain a safe distance (of at least 500m) from the survey vessel locations at all times.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer.
See detailed map on our bulletin website
Rig - Deepsea Yantai
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.
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Rig - Swift 10
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.
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Debris Clearance Geophysical Seabed Survey - Seven Seas
Spirit Energy intend to conduct a debris clearance geological seabed survey at the Seven Seas well 48/7c-13y on or around 15th February 2026.
Spirit Energy intend to conduct a debris clearance geological seabed survey at the Seven Seas well 48/7c-13y on or around 15th February 2026. The survey will be undertaken by the Ocean Researcher MV and is expected to take approximately 2 days. This date is subject to change depending on operational requirements.
See detailed map on our bulletin website
Debris Clearance Geophysical Seabed Survey - Grove G5
Spirit Energy intend to conduct a debris clearance geological seabed survey at the Grove G5 well 49/10a-4 on or around 15th February 2026.
Spirit Energy intend to conduct a debris clearance geological seabed survey at the Grove G5 well 49/10a-4 on or around 15th February 2026. The survey will be undertaken by the Ocean Researcher MV and is expected to take approximately 2 days. This date is subject to change depending on operational requirements.
See detailed map on our bulletin website
Vertical Seismic Profile - Elgin Platform
Elgin Platform deployed seismic source for 1-well Vertical Seismic Profile (VSP)
Seismic source to be deployed by crane from the Elgin platform, for a 1-well Vertical Seismic Profile (VSP) on the B5 well. All operations to occur within Elgin 500m zoneEstimated duration of acquisition is 12 hours, not including weather standby.
See detailed map on our bulletin website
Rig - Deepsea Atlantic
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.
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Rig - COSL Innovator
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.
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Rig - COSL Promoter
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.
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Rig - Valaris Stavanger
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.
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Rig - Seafox 4
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.
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Danger - Protruding Isolation Plugs on End of Live Pipeline - Galahad
Following the removal of the Galahad monopod structure Perenco UK is warning mariners of protruding isolation plugs on pipeline PL1166, which is connected to the live/operational Lancelot Area Production System. An Isolated Danger Marker Buoy has been installed at the site of the former Galahad structure to mark this hazard.
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West Cardinal buoy unlit - Banff Field
The Banff field west cardinal buoy is currently unlit due to storm damage affecting power supply. No AIS signal available from buoy. Buoy has been visually confirmed in correct location, with radar reflector in place.
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DSV Activity - Thistle Platform
DSV operations within Thistle 500m zone conducting decommissioning operations.
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Stena Don in Penguin Field in Northern North Sea
Stena Don in Penguin Field in Northern North Sea at Pan NW. Pre-lay anchors will be installed initially, rig will moor up immediately after anchors are installed. Rig will be on location for approximately 120 days, the anchor spread could remain until 31st October.
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Remedial & Recovery Campaign - Central North Sea
Perenco will conduct a Remedial and Recovery Campaign at various locations in the Southern North Sea. The campaign will start from 04th February and be completed by the end of April 2026.
Arthur - Remedial Cutting at former wellheads, former manifold and umbilical
E&A Well 49/29a-7 - Mattress Recovery
Leman 27 J - PL206 & PL207 Subsea Cutting
Inde 18A - PL76 Remedial Cutting & Inde 18 A Debris Removal
Davy North & East - Remedial Cutting & Debris Removal
See detailed map on our bulletin website
Subsea Decommissioning - Western Isles Locations
Dana 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 website
Swift 10 MODU to move on location on the Sean Papa Platform current date for rig move 26th January.
The Swift 10 is contracted to ONE-Dyas to plug and abandon wells on the Sean Papa platform as part of the Sean Field decommissioning in the Southern North Sea for approximately 120 days. The rig will move from L8-P4 platform (NLCS) to Sean Papa (UKCS).
The Swift 10 will arrive arround January 27th to Plug and Abandon the wells and pull the conductors on the Sean Papa manned platform. The platform and rig will work in combined operation.The process will involve the MODU being towed to location, it will be positioned temporarily at stand-off position then anchors will be run to move MODU into final position.
The Swift 10 is a MSC SEA-2750 self-elevating unit . Aids to Navigation are listed as:- AIS, DSC MF/HF, VHF System, ER VHF Portable and RT/DSC, EPIRB,GPS/DGPS, Inmarsat C/ECG, GMDSS PRINTER, VSAT, LRIT, NAVTEX, SART, SSAS
The Rig Move procedure is in conjunction with the Marine Operations manual. Required rig move notifications will be made prior to the move.
The navigation lights on the Swift 10 are not able to be synchronised with the Sean PP. Navigation lights for both the Swift 10 and Sean Papa platform will remain turned on.
See detailed map on our bulletin website
Planned Rig Move – Dolphin PBLJ
This is to advise of the upcoming planned rig move for the Dolphin PBLJ. The rig will relocate from the Joanne Field to the Balmoral Field to undertake P&A operations. • Departure from Joanne Field: 21 January (Estimated) • Estimated Duration on Location: Approximately 140 days • Scope: Five well P&A campaign
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Rig - Valaris 120
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.
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Rig - Transocean Norge
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.
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Rig - Linus
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.
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Rig - Prospector 1
This 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.
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Rig - Noble Resolute
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.
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Offshore Development Area - Penguins Redevelopment Project
NOTE: 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 website
PL24 Cut-point Freespan - North Sea
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 website
Rig - Deepsea Aberdeen
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.
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Rig - Safe Caledonia
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.
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Rig - Irish Sea Pioneer
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.
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Rig - Valaris 72
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.
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Rig - Deepsea Nordkapp
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.
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Rig - Noble Innovator
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.
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Rigmove - Valaris 121
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.
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Rig - Deepsea Stavanger
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.
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Rig - Deepsea Bollsta
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.
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Rig Move - COSL Pioneer
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.
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Rig - Askeladden
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.
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Rig - Noble Integrator
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.
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Rig - Askepott
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.
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Rig - Noble Lloyd Noble
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.
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Metocean Buoy Installed - Pierce Area #1
A yellow spherical anchored wave buoy
Clump weight: 500 kg steel ballast with chain
Deployment date: 26/08/2025
Radius cone: ~120m
Model: Datawell DWR Mk3 buoy
Diameter: 0.9 m
Colour: yellow
LED light: 5 flashes in 10 s 20 s repetition 360° around for 4 Nm distance
See detailed map on our bulletin website
Rig Move - Maersk Inspirer
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.
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Rig - Valaris 122
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.
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Rig - Paul B Loyd Junior
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.
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Rig - West Elara
This 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.
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Rig - Noble Invincible
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.
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Rig - Ensco 92
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.
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Rig - Valaris 123
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.
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Jackdaw Development - North Sea
The 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.
Sat 1st of November 2025 - The Deep Arctic vessel will carry out 4 hours of DP trials.
See detailed map on our bulletin website
Infill Drilling - Cygnus Field
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*
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204/20a Schiehallion NW Drill Centre Wet Parked Marine Riser
In Q2 2024, a Semi-submersible Mobile Offshore Drilling Unit incurred an unexpected release of the Lower Marine Riser Package, and the associated Marine Riser. This fell to seabed in the Schiehallion NW drill centre. Subsequent works were undertaken to cut the riser into manageable sections, relocate them to a wet park area outside the 500m zone at Schiehallion NW. Stabilisation material was then installed to secure their position pending retrieval to surface and subsequent on-shore disposal.
14 off Marine riser sections remain on the seabed at the location identified on the attached layout drawing. Their positioning has been secured utilising a combination of methods involving the following deployed equipment:
- 24 off gabion bags (2 te each),
- 24 off (6m x 3m mattresses),
- 14 off horizontal nets and
- 1 off clump weight.
Plans are underway to retrieve all items during a single campaign scheduled for 2026 following which this notice will be retracted/updated to confirm full removal.
The Marine Riser was cut up, relocated and subsequently stabilised via a Marine Licence (ML/1100) issued by OPRED.
See detailed map on our bulletin website
Subsea structure with missing roof panels - PL873 "PDF" tee structure
PL873 "PDF" tee structure - roof panel not present.
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Foinaven Buoyant Risers within Water Column
Subsea Risers which left in the water column at Foinaven following the removal of the FPSO. These buoyant risers are now covered by 3 new 500m safety zones but do still pose a significant snagging hazard due to their size, number (13x) and height above seabed (160m at highest point). There is no surface infrastructure in the area hence this notification to supplement the 500m zones
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Plug and Abandonment Operations - Otter Wells
Noble Patriot to complete plug and abandonment operations at the Otter wells. Positioned with 8 x anchors within the radius of 61 30 52.206 North 00 57 4.215 East. Consent to Locate permit reference number: WIA/1727 CL/1556.
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Marine Installation Operations – Rosebank Development Area
Multiple 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.
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Nelson Platform Derrick & Substructure Removal Operations
Derrick & Substructure Removal Operations. Removal operations in advance of platform decommissioning.
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Solan platform has commissioned a Solar Navaid system
The Solan platform has commissioned a Solar Navaid system which is monitored by Trinity House.
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Noble Innovator - Mungo
Please be advised that the Jack-up rig 'Noble Innovator' is alongside the Mungo Platform, and will remain in this position for the foreseeable.
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Pipeline and Umbilical Installation (Subsea) - Belinda
Installation 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 website
Bittern WI Pipeline replacement and tie in spool works - North Sea
Notification 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 website
Bittern Valve Skid (BIVS) - North Sea
Notification 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 website
Valaris V121 over Shearwater Alpha
Valaris 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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