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Survey - Brent Field Attic Oil Recovery
Brent Charlie Attic Oil Recovery
The 2026 Attic Oil Recovery (AOR) campaign at Brent Charlie will encompass an upfront access and survey campaign followed (as required / possible) by recovery of mobile attic oil and interphase material.
See detailed map on our bulletin website
Liverpool Bay CCS Dredge Support Surveys
Mariners are advised that Liverpool Bay CCS Ltd will conducting dredge support survey activities using the NRH Cormorant. The Cormorant will initially be working within Blocks A & B of the Liverpool Bay CCS Cable Construction Corridor.
Works will expand as dredge vessels mobilise to site and additional dredge support survey vessels may also be mobilised during the survey period which will be notified accordingly.
Dredging support surveys will take place along the Liverpool Bay CCS Cable Construction Area
The CCS Cable Construction corridor has been divided into ten separate blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders.
The Cormorant will initially be working within Blocks A & B – updates to follow
Mariners are advised to always maintain a safe distance (of at least 500m) from construction vessels.
See detailed map on our bulletin website
Caisson removal at the Bruce Platform
We are undertaking a caisson inspection and removal campaign, and shim installation, on the Bruce PUQ Platform using the multi purpose support vessel, the Stril Server. All work is carried out within the Platform's 500m zone.
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Subsea Actuator Removals - Ninian Central Subsea Isolation Valve Protection Structure
During the period 10th August to 21st August, CNR International (UK) Limited will be carrying out the following works, utilising a diving support vessel:- Location – Ninian Central Subsea Isolation Valve Protection Structure Co-ordinates - 60° 51' 22.5346'' N, 01° 28' 30.1888' E Activity – Subsea Isolation Valve Actuator Removal x 2 Vessel Name – Boka da Vinci
As per the conditions detailed in Marine Licence ML/1266 please be advised that during the period 10th August to 21st August, CNR International (UK) Limited will be carrying out the following works, utilising a diving support vessel:-
Location – Ninian Central Subsea Isolation Valve Protection Structure
Co-ordinates - 60° 51' 22.5346'' N, 01° 28' 30.1888' E
Activity – Subsea Isolation Valve Actuator Removal x 2
Vessel Name – Boka da Vinci
See detailed map on our bulletin website
Rosebank Field Drilling Operations
The Deepsea Atlantic mobile drilling rig will be conducting operations in the Rosebank field.
Drilling operations will be conducted over various subsea templates in the Rosebank field
The rig will be operating on DP, there will be no moorings.
Deepsea Atlantic call sign - 2CEV5.
See detailed map on our bulletin website
Ornithological Survey - Southern North Sea
Perenco will be undertaking an Annual Ornithological Survey of 16 assets in the Southern North Sea from 10th July 2026 - 15th July 2026 (weather permitting).
Perenco will be utilising the Putford Voyager to undertake the Annual Ornithological Survey on the below assets from 10th July 2026 - 15th July 2026 (weather permitting):
- Leman 27A (53° 03' 17.8380"N, 02° 14' 06.1496"E)
- Leman 27H (53° 00' 17.1518"N, 02° 12' 54.1631"E)
- Leman 27J (53° 01' 57.7494"N, 02° 13' 09.2251"E)
- Trent (54° 17' 58.8606"N, 01° 39' 35.5641"E)
- Inde 23A (53° 19' 25.1211"N, 02° 34' 29.6848"E)
- Inde 23C (53° 18' 28.4800"N, 02° 34' 03.7153"E)
- Malory (53° 32' 38.0011"N, 01° 14' 39.3491"E)
- Lancelot (53° 24' 36.6114"N, 01° 22' 30.9098"E)
- Excalibur (53° 27' 54.3179"N, 01° 20' 40.3601"E)
- ST-2 (54° 03' 17.1182"N, 01° 02' 04.0201"E)
- ST-3 (54° 04' 24.2799"N, 00° 54' 53.2298"E)
- Minerva (53° 57' 00.4485"N, 00° 35' 41.8090"E)
- Ravenspurn North (54° 01' 53.0147"N, 01° 06' 08.0422"E)
- Hyde (53° 48' 26.4731"N, 01° 01' 43.0280"E)
- Hoton (53° 48' 12.7466"N, 01° 12' 27.7826"E)
- West Sole Alpha (53° 42' 12.2687"N, 01° 08' 59.5423"E)
Removal of Gaupe North and South Umbilicals
The disconnection and removal of the Gaupe north and south umbilicals, from the cut point within the Armada Complex Hub 500 m zone up to the UK/Norway median line cut point.
The disconnection and removal of the Gaupe north and south umbilicals (PLU2784 and PLU2785), from the cut point within the Armada Complex Hub 500 m zone up to the UK/Norway median line cut point. The work will be carried out by DOF Subsea on behalf of the operator A/S Norske Shell. The scope includes operations that are licensable under the Marine (Scotland) Act 2010 and will be conducted under appropriate regulatory approvals. Vessel Name: Skandi Skansen
See detailed map on our bulletin website
Geotechnical Boreholes - Stephenson site in block 49/17b
Hartshead resources will be conducting a short geotechnical borehole programme at the Stephenson rig site in Block 49/17b starting on or around 14th to 17th July. The vessel Horizon Geodrill will be carrying out the work which will take place within a radius of 200m from the listed location.
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SID2 Decommissioning Project (Merganser)
Subsea decommissioning activities will take place across the Scoter, Merganser, Heron, Atlantic & Cromarty and Kingfisher field locations. This will include the removal of infrastructure, and associated remediation and make-safe activities. Vessel - BOCA NORTHERN OCEAN
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SID2 Decommissioning Project (Atlantic & Cromarty and Heron)
Subsea decommissioning activities will take place across the Scoter, Merganser, Heron, Atlantic & Cromarty and Kingfisher field locations. This will include the removal of infrastructure, and associated remediation and make-safe activities. Vessel - BOCA NORTHERN OCEAN
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SID2 Decommissioning Project (Scoter)
Subsea decommissioning activities will take place across the Scoter, Merganser, Heron, Atlantic & Cromarty and Kingfisher field locations. This will include the removal of infrastructure, and associated remediation and make-safe activities. Vessel - BOCA NORTHERN OCEAN
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Subsea infrastructure - Seven Seas and Grove G5
Following well P&A activity, the wellhead at Seven Seas remains in-situ and will be removed at a later date. The 500 m safety zone remains in place. Following well P&A activity at Grove G5, the wellhead protection structure and wellhead remain in situ and will be removed at a later date. The 500 m safety zone remains in place.
Following well P&A activity, the wellhead at Seven Seas remains in-situ and will be removed at a later date. The 500 m safety zone remains in place.
Following well P&A activity at Grove G5, the wellhead protection structure and wellhead remain in situ and will be removed at a later date. The 500 m safety zone remains in place.
See detailed map on our bulletin website
Well-Safe Protector - P&A Activities at Seven Seas and Grove G5
The Well-Safe Protector will mobilise from Aberdeen to the Seven Seas (48/7c-13y) location to undertake P&A activities, on or around the 15th April 2026. When complete, the rig will move to Grove G5 (49/10a-4) to complete P&A activities at this location. Total operations are expected to take 70 days and be complete by the end of July 2026. Update: Rig now at Grove G5 location. The wellhead at Seven Seas remains in-situ and will be removed at a later date. 500 m safety zone remains in place.
The Well-Safe Protector will mobilise from Aberdeen to the Seven Seas (48/7c-13y) location to undertake P&A activities, on or around the 15th April 2026. Operations are expected to take a total of 40 days and to be complete by the end of May 2026. Following this activity, the rig will move to Grove G5 (49/10a-4) location to undertake P&A activities. It is expected to be at Grove G5 for 30 days. All activities are expected to be complete by the end of July 2026. This date is subject to change depending on weather and operational requirements.
Update: The rig has now moved to the Grove G5 location. The wellhead at Seven Seas remains in-situ and will be removed at a later date. The 500 m safety zone remains in place.
See detailed map on our bulletin website
NEP Pre-Lay Offshore Dredging Activities - Njord R & Hermond R
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking sand dredging activities within Blocks 4 & 5 of the NEP pipeline construction area as part of the pre-lay pipeline construction activities.
The works will be undertaken by two vessels: the Hermod R and the Njord R. The Hermod R activities are anticipated to commence on 24th July, for approximately 11 weeks (weather dependent).
The Njord R activities are estimated to commence ~ 17th July, for approximately 8 weeks (weather dependent).Mariners are advised to always maintain a safe distance (of at least 500m) from the Njord R and the Hermod R.
The operations will be conducted within NEP Pipeline Construction Area Blocks 4 and 5.
For further information, please do not hesitate to contact the NEP Fishing Industry Representative or the Company Fisheries Liaison Officer.
See detailed map on our bulletin website
P&A of Subsea Well Leman Southwest 53/02a-15Y and removal of WHPS
Plug & Abandonment (P&A) of Subsea Well Leman Southwest 53/02a-15Y and removal of Wellhead Protection Structure (WHPS).
The HAEVA Mobile Offshore Drilling Unit (MODU) will be deployed to commence the P&A & WHPS removal activities at Leman Southwest 53/02a-15Y
Date of commencement: earliest start date: 5th August 2026
Date of completion: Latest end date: 4th September 2026
See detailed map on our bulletin website
Seabed Object - Potential Snagging Hazard - Murchison field
4m x 4m x 4m object identified during 2026 sonar survey of decommissioned Murchison field
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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 - Scarabeo 8
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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Rosebank scope activities in BP WOSPS area
Pre-commissioning activities – Gas Export Pipeline dewatering pig train installation @ BP WOSPS location Pre-commissioning activities – Valve operations @ BP WOSPS location
Install subsea PLR (Pig Launcher)
Connect downline from vessel into gas export PLEM
Gas Export Pipeline dewatering pig train installation
Deep Explorer
See detailed map on our bulletin website
Rosebank scope activities
Rosebank SURF pre-commissioning activities
Pipeline / flowline dewatering activities
ROV survey support including “as installed” survey
Flowline tie-ins
WRB recovery
Deep Explorer
See detailed map on our bulletin website
Anchor Locations - Tybalt
The Paul B Loyd Jr rig is expected to depart the Tybalt field 8th/9th July. Anchor locations provided will remain in-situ up to 5 days following departure, when the vessels will return to retrieve buoyed anchors
P&A of the Tybalt E&A well 4z
Updated 2nd June to show actual anchor locations
Update provided 3rd July to confirm departure date
See detailed map on our bulletin website
Plug & Abandonment Operations at Pelican - Noble Patriot
Plug & Abandonment operations at Pelican - to be completed by the Noble Patriot, as detailed within WIA/1887 CL/1619. 8 x anchors within radius of 61 2 2.70 North 01 7 45.67 East. Rig expected to arrive on location 10th July 2026.
Plug & Abandonment operations at Pelican - to be completed by the Noble Patriot, as detailed within WIA/1887 CL/1619.8 x anchors within radius of 61 2 2.70 North 01 7 45.67 East. Rig expected to arrive on location 10th July 2026.
Line 1: Easting 561614, Northing 6768675 Line 2: Easting 561993, Northing 6767856 Line 3: Easting 562460, Northing 6766580 Line 4: Easting 561892, Northing 6765627 Line 5: Easting 560483, Northing 6765504 Line 6: Easting 559550, Northing 6766204 Line 7: Easting 559370, Northing 6767947 Line 8: Easting 560099, Northing 6768768
See detailed map on our bulletin website
Pre-laying Anchors & Grapple Line Pick Up at Pelican - in preparation for Noble Patriot arrival
Pre-laying of anchor at Pelican - in preparation for Noble Patriot arrival, as detailed within WIA/1887 CL/1619. 8 x anchors to be placed within radius of 61 2 2.70 North 01 7 45.67 East. Recovery of the anchor pickup grapple line from the seabed and attachment of surface buoys to commence prior to rig arrival on 10th July.
Pre-laying of anchor at Pelican - in preparation for Noble Patriot arrival, as detailed within WIA/1887 CL/1619. 8 x anchors to be placed within radius of 61 2 2.70 North 01 7 45.67 East.
Recovery of the anchor pickup grapple line from the seabed and attachment of surface buoys to commence prior to rig arrival on 10th July.
Line 1: Easting 561614, Northing 6768675 Line 2 [to be layed at time of rig arrival]: Easting 561993, Northing 6767856 Line 3: Easting 562460, Northing 6766580 Line 4: Easting 561892, Northing 6765627 Line 5: Easting 560483, Northing 6765504 Line 6: Easting 559550, Northing 6766204 Line 7: Easting 559370, Northing 6767947 Line 8: Easting 560099, Northing 6768768
See detailed map on our bulletin website
Plug & Abandonment Operations at Cladhan - Noble Patriot
Plug and abandonment operations at Cladhan - to be completed by Noble Patriot, as detailed within WIA/1885 CL/1588. Including 8 x anchors within radius of 61 08 53.92 North 00 47 13.62 East.
Plug and abandonment operations at Cladhan - to be completed by Noble Patriot, as detailed within WIA/1885 CL/1588.Including 8 x anchors within radius of 61 08 53.92 North 00 47 13.62 East.
See detailed map on our bulletin website
4D Seismic acquisition - Mariner
EQUINOR on behalf of ADURA are planning to acquire another 4D survey at the Mariner field (P335, P726, P979, P2151, covering blocks 8/15, 9/11 & 9/12) during July 2026. • Vessel name : Amazon Conqueror (Streamer vessel), SW Gallien (source vessel for undershoot), Shemarah II (escort vessel), Ocean Dee (supply vessel) • Location and purpose : Mariner field, UKCS Block 8/15, 9/11 & 9/12 , 4D seismic acquisition + undershoot.
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Pre-Decommissioning Environmental Survey - Foinaven
Environmental and Geophysical survey operations carried out by the vessel Geo Ocean III, on behalf of bp, shall commence approximately 21st July. Survey operations are expected to last a duration of 30 days subject to any delay due to adverse weather.
Geo Ocean III shall be conducting an environmental survey in the Foinaven Field. The survey shall comprise:
- AUV geophysical survey at approximately 3 knots using multibeam echosounder and sidescan sonar. This survey shall primarily cover the former DC 500m zones and pipeline/umbilical corridors in the field.
- Environmental survey, of up to 36 stations. At each station the vessel shall complete camera transects and grab samples.
- ROV general visual inspection of Structures
Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre.
See detailed map on our bulletin website
Facilities Inspections - Howe, Kittiwake, Gannet
Facilities Inspections with a vessel utilizing a Remotely Operated Vehicle
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Pipeline Inspections - Nearshore SNS
Conducting Pipeline Inspections of existing pipelines with a small vessel equipped with geophysical equipment.
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Subsea Well Investigations for Minerva M1 & Mercury MY02
Perenco UK Limited is undertaking a subsea well investigations and inspections campaign on Minerva M1 and Mercury MY02, utilising the Wagenborg Kingsborg as the Diving Support Vessel (DSV).
The Kingsborg will conduct 24-hour diving operations in support of subsea inspection and investigation activities. The campaign is expected to last approximately 35 days and will involve vessel, diving, and subsea support operations at Minerva M1 Block 47/04 and Mercury MY02 Block 47/09 within the Southern North Sea.
See detailed map on our bulletin website
Disconnect Campaign - Leman Southwest Pipelines PL3731 & PLU3732 Disconnect Campaign
Leman Southwest Pipelines PL3731 & PLU3732 Disconnect Campaign
Perenco UK Limited is carrying out a pipeline disconnection (PL3731 & PLU3732) campaign using the Wagenborg Kingsborg. The Kingsborg will act as the Diving Support Vessel (DSV) and will be on location in to carry out the pipeline disconnect activities using divers in 24hr operations. The pipeline disconnect campaign is scheduled to take place over a 10 day period.
See detailed map on our bulletin website
Pipeline Inspections - Nearshore CNNS
Conducting Pipeline Inspections of existing pipelines with a small vessel equipped with geophysical equipment.
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Rig move - Paul B Lloyd Junior and anchor locations (B15 RD)
This oil & gas drilling rig will move to a new location from 1st July to 31st July. Anchors will be pre-laid 15th June. Rigs are protected by a 500m safety zone. As anchors will extend beyond this zone these are the locations provided.
B15 redrill operations
See detailed map on our bulletin website
PL2951 Span at Gryphon Well Cluster
Freespan Length = 71.04m, Height = 0.824m within Gryphon Cluster 500m safety zone. With 16 x Touchdown points noted along the length.
Freespan Length = 71.04m, Height = 0.824m within Gryphon Cluster 500m safety zone.With 16 x Touchdown points noted along the length.
See detailed map on our bulletin website
Seismic Survey - Culzean Field
Seismic OBN survey in and around the Culzean field.
Seismic OBN survey, with a shot carpet of 320km2, in and around the Culzean field. 3 or 4 vessel field crew, consisting of a node handling vessel, source vessel and 1-2 support/guard vessels. Estimated mobilisation date: 20th August for 55 days.
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 zone.Estimated duration of acquisition is 12 hours, not including weather standby.
See detailed map on our bulletin website
Rig - Noble Patriot
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 - Well-Safe Guardian
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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Decommissioning - Wenlock
The OBANA Heavy Lift Vessel will undertake topside and jacket removal activities at the Wenlock installation.
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Decommissioning - Kilmar
The OBANA Heavy Lift Vessel will be located alongside the Kilmar installation to facilitate the removal of the Kilmar topside and jacket structures.
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Decommissioning - Garrow
The OBANA Heavy Lift Vessel (HLV) will be located alongside the Garrow installation to facilitate the removal of the Garrow topside and jacket structures.
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Subsea Decommissioning - Leman Southwest
The HAEVA Jack-Up Barge (JUB) will facilitate decommissioning activity at the Leman South field. The Leman Southwest subsea well will be plug and abandoned (P&A) and the Wellhead Protective Structure (WHPS) will be removed.
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Subsea Decommissioning - Durango
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.
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.
See detailed map on our bulletin website
FPSO & moorings decommissioning - Western Isles
The Western Isles FPSO and mooring lines have been removed. Mooring piles have been cut and recovered. Mooring pile tail chains remain on the seabed.
The mooring piles have been cut below seabed level and the cut sections recovered.
See detailed map on our bulletin website
Decommissioning - Western Isles infield subsea infrastructure
Infield pipelines and manifolds associated with the Western Isles Development will be decommissioned
Risers, tie-in spools, manifolds and mid-water arches have been recovered from the seabed. The surface laid pipeline bundles that served the North and South drill centres remain in place until a decommissioning option is finalised. Wellheads remain in place protected by existing fishing protection structures.
See detailed map on our bulletin website
Kingfisher Field - Post Decommissioning Survey
The Kingfisher post-decommissioning environmental survey
The survey will cover an area of 3 x 3 km, where the bathymetry, Side Scan Sonar, Multi Beam Echo Sound and environmental scope of work (grab samples and video transects) will be carried out.
See detailed map on our bulletin website
Decommissioning preparation and jacket removals works - Eider Alpha
The Eider Alpha upper jacket will have construction vessels Lorelay, Pioneering Spirit and ERRV working inside the 500m zone conducting preparation works for upper jacket removal by HLV at latter end of working window provided.
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Post Decommissioning Survey - Curlew Field
Curlew field post-decommissioning environmental survey
The survey will cover 4 areas of 3 x 3 km where the bathymetry, Side Scan Sonar, Multi Beam, Echo Sound and environmental scope of work (grab samples and Video transects) will be carried out.
See detailed map on our bulletin website
NEP Expansion - Vertical Seismic Profile - BC37
Please be advised that a Vertical Seismic Profile will take place at the BC37 drilling location using an airgun seismic source deployed from the Nobel Intrepid rig between 5th July and 15th August 2026. The survey will take a total of 12 hours.
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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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Rig - Shelf Drilling Barsk
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 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 - 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 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 - 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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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 - 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 - Deepsea Bergen
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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Fugro Galaxy - UXO Survey - Liverpool Bay Assets Field
UXO & Various surveys throughout the LBA Field - vessel will be in field for around 90 days.
ENI UK is currently in the process of Decommissioning of assets in Liverpool Bay as part of the end oil & gas production (Figure 2.1). There are two main projects running in parallel.
- Decommissioning of the platforms
- Plug & Abandonment of wells for the closure of the field
- Seismic Survey 6z IW Survey at Lennox
- A combined UXO desk study has been commissioned by ENI in 2025 which was completed by Fugro to assess the UXO risk for the different project phases, this incorporates historic
survey data to understand the potential risk of UXO’s with depth and in many places in Liverpool Bay bedrock is at or very near the surface resulting in a potentially lower risk of UXO’s being present. This desk study has then informed dedicated risk assessments for decommissioning and P&A should be consulted for a more detailed understanding of the UXO’s potentially located in the area.
Hook-up and tensioning of Rosebank FPSO mooring lines
3 x anchor handling vessels (AHVs) will hook-up and tension 12 x mooring chains to secure the Rosebank FPSO in location. This will be followed by cutting off the excess mooring chain and recovering to deck. Part of this scope will be to recover blast matts & turning bollards.
Skandi Vega / Skandi Iceman & Skandi Skansen will conduct operations to hook-up 12 x mooring chains to the Rosebank FPSO when in location in the Rosebank field.
This will include tensioning of the mooring chains to establish 100 year storm safe.
Following this the excess mooring chain will be cut and recovered to deck.
Survey activities is a part of this scope.
Part of this scope will be to recover blast matts & turning bollards.
Once 100 year storm safe is established the Skandi Vega & Skandi Iceman will leave the field, however Skandi Skansen will remain until scope complete.
See detailed map on our bulletin website
Pre-laying Anchors & Grapple Line Pick Up at Falcon - in preparation for Noble Patriot arrival
Pre-laying of anchor at Falcon - in preparation for Noble Patriot arrival, as detailed within WIA/1885 CL/1588. 8 x anchors to be placed within radius of 61 19 50.08 North 00 59 28.19 East. Recovery of the anchor pickup grapple line from the seabed and attachment of surface buoys to commence prior to rig arrival on 25th June.
Pre-laying of anchor at Falcon - in preparation for Noble Patriot arrival, as detailed within WIA/1885 CL/1588.8 x anchors to be placed within radius of 61 19 50.08 North 00 59 28.19 East.
Recovery of the anchor pickup grapple line from the seabed and attachment of surface buoys to commence prior to rig arrival on 25th June.
See detailed map on our bulletin website
Plug & Abandonment Operations at Falcon - Noble Patriot
Plug and abandonment operations at Falcon - to be completed by Noble Patriot, as detailed within WIA/1886 CL/1597. Including 8 x anchors within radius of 61 19 50.08 North 00 59 28.19 East. Rig arrival due to commence on 25th June 2026.
Plug and abandonment operations at Falcon - to be completed by Noble Patriot, as detailed within WIA/1886 CL/1597. Including 8 x anchors within radius of 61 19 50.08 North 00 59 28.19 East. Rig arrival due to commence on 25th June 2026.
See detailed map on our bulletin website
Rosebank FPSO station keeping
Once the Rosebank FPSO arrives on location within the Rosebank Development Area, the 4 x tug vessels will conduct station keeping of the FPSO whilst the mooring chain hook-up is completed.
The AHTS vessels:
Normand Prosper / Normand Sapphire / Skandi Minder / Siem Pearl
are conducting the tow from Bergen, Norway of the Rosebank FPSO to the Rosebank Oilfield.
Once on location at the Rosebank field, all 4 vessels will conduct station keeping until the mooring chain hook-up is complete.
Details of AHTS conducting the hook up of anchors can be found in the Notice Titled - Hook-up and tensioning of Rosebank FPSO moorings
See detailed map on our bulletin website
Gannet D Field Seismic Survey
Seismic survey to be completed around the Gannet D Field
Seismic survey to be completed around the Gannet D Field: The survey will cover an area of 5 x 5 km, where the bathymetry, 2DHR, Side Scan Sonar, Multi Beam, Echo Sound and environmental scope of work (grab samples and video transects) will be carried out.
See detailed map on our bulletin website
Arran South Field - Seismic Survey
Arran South Field Seismic Survey
The survey will cover an area of 5 x 5 km, pipeline route where the bathymetry,2DHR, Side Scan Sonar, Multi Beam Echo Sound and environmental scope of work (grab samples and video transects) will be carried out.
See detailed map on our bulletin website
Decommissioning Activities & Sail-away of FPF-1 - Greater Stella Area
GSA flushing, disconnects and sail-away of the FPF-1 semi-submersible asset
Ithaca Energy is undertaking the decommissioning of the Greater Stella Area (GSA) field facilities, located in central North Sea Blocks 30/06, 30/01 and 29/10. GSA has been developed via a number of subsea tie-backs (Stella main drill centre (MDC), Stella north drill centre (NDC), Harrier, Abigail and Vorlich), and associated subsea infrastructure (manifolds, infield pipelines, gas lift lines, umbilicals, risers and riser bases), and export pipelines (gas and oil), tied into the floating production facility, the Stella FPF-1.
The Stella FPF-1 is due to come off location 6th July. The FPF-1 will be towed to Norway, with an anticipated arrival date of 9th July. Activity will remain in field through July - Sept to remove the MWAs and other infrastructure.
Some items will remain wet stored in the GSA for later recovery - 500m zones will remain in place.
See detailed map on our bulletin website
NEP Pre-lay Mattress Installation and Boulder Relocation
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking outcrop crossing mattress installation, gate/marker installation, boulder relocation and associated pre-lay survey activities within the NEP pipeline construction area as part of the pre-lay pipeline construction programme.
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking outcrop crossing mattress installation, gate/marker installation, boulder relocation and associated pre-lay survey activities within the NEP pipeline construction area as part of the pre-lay pipeline construction programme.
The works will be undertaken by the EDT Hercules, which is currently scheduled to mobilise from Aberdeen on 25 June 2026, with arrival at the construction area anticipated on 27–28 June 2026, subject to weather conditions.
Initial activities will comprise mattress installation, gate/marker installation and boulder relocation works, which are expected to continue for approximately 45 days. Following completion of these activities, the vessel will undertake pre-lay survey and pipelay support activities within the construction area.
Offshore activities by the EDT Hercules are currently anticipated to continue until approximately 24 September 2026, although all dates remain subject to weather, operational requirements and programme changes.
An Offshore Fisheries Liaison Officer (OFLO) will be present onboard the EDT Hercules throughout the offshore campaign and will act as the primary point of contact between the vessel and the fishing industry.Mariners are advised to maintain a safe distance of at least 500 metres from the EDT Hercules at all times.
The operations will be conducted within Fishing Blocks 1–5. These locations are shown below in Figure 1 and Table 1.
For further information, contact details for the Fishing Industry Representative and Company Fisheries Liaison Officer are provided in Section 7.
See detailed map on our bulletin website
Curlew Wellhead Severance
The 2026 campaign is intended to mobilise during early Q3 and consists of recovering 5 wells at Curlew well site. All wells have been plugged and abandoned with the Subsea Tree removed. Vessel Name: MV Island Valiant
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Pipeline Survey and Seabed Mapping Campaign - North Sea pipeline infrastructure
4-yearly survey of CNRI's North Sea pipeline infrastructure, including seabed mapping along pipeline corridors and 500m zones.
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ROV survey - Statfjord Intrafield Pipeline
Pipeline survey using ROV from Edda Flora of the Statfjord intrafield pipeline (SIPS)
Statfjord intrafield survey using ROV from the vessel Edda Flora in water depths of approximately 70-150m. No towed equipment in use.
Vessel: Edda Flora
IMO/MMSI: 9386380/258245000
Call Sign: LAJW3
See detailed map on our bulletin website
Seismic Survey - Clair & Clair-Ridge Fields
Multiple vessels will conduct an Ocean-Bottom Seismic (OBS) survey across the Clair and Clair Ridge oil fields. The operation will involve deploying seismic receivers (nodes) on the seabed and operating seismic sources (airguns). The survey is expected to last approximately two months, commencing around 30 June 2026.
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Statfjord Multibeam Echosounder Survey - Statfjord field on both NCS and UKCS
Multibeam echosounder (MBE) survey EQ26999 in the Statfjord field on both NCS and UKCS Note: Survey will start in NCS until permit amendment for UKCS portion is in place
The MBE survey will be carried out by M/V “Ocean Geograph”. During the survey acquisition there will be no towed equipment, just the hull mounted MBE. That means the vessel has full ability to manoeuvre apart from the areas where the 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 it deepens to 240 meters. The duration of the survey is estimated to 12 effective days + possible weather stand-by. The earliest survey start date is set to 19th June but much likely a few days later.
Callsign: C6JC4
Vessel Phones: +44 20 3695 1403 / 1404 / 1405 / 1410
VHF: Channel 16
IMO: 9267388
See detailed map on our bulletin website
NEP Confirmed Unexploded Ordnance No. 5, 6, & 7
Mariners are advised that the Northern Endurance Partnership (NEP) has identified a further 3 confirmed Unexploded Ordnance within Block 5 of the NEP Pipeline Construction Area
An Unexploded Ordinance (UXO) Investigation survey utilising an ROV (Remote-Operated Vehicles) which is currently being undertaken by the Glomar Wave (see section 6) has identified a further 3 confirmed UXO within the NEP pipeline construction area Block 5
There are now six confirmed UXOs with NEP Block 5 and one within NEP Block 3
See detailed map on our bulletin website
NEP Confirmed Unexploded Ordnance No.4
Mariners are advised that following UXO identification survey the Glomar Wave has identified a Third confirmed UXO within NEP Pipeline Construction Area Block 5. Further investigations are being conducted and updated will follow.
An Unexploded Ordinance (UXO) Investigation survey utilising an ROV (Remote-Operated Vehicles) which is currently being undertaken by the Glomar Wave (see section 6) has identified a confirmed UXO within the NEP pipeline construction area Block 5. Further updates will follow.
There are now three confirmed UXOs with NEP Block 5
See detailed map on our bulletin website
NEP Confirmed Unexploded Ordnance No.3
Mariners are advised that following UXO identification survey the Glomar Wave has identified a second confirmed UXO within NEP Pipeline Construction Area Block 5. Further investigations are being conducted and updated will follow.
Please see attached NtM for further information.
See detailed map on our bulletin website
Rig - Magniacus
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 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 - Hea Hydra
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 - 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 - 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 - 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 - 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 - 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 - Noble Resolute
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 - Erda
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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Jack up & Well Intervention Operations: HAEVA/Apollo
Vessel HEAVA will be onsite at Apollo for well maintenance in the Apollo field from the 12th June at the earliest until 7th August 2026. A guard vessel, kingfisher will be on site from the 12th of June.
The Apollo A1 and A2 wells are located in the Apollo field in the Southern North Sea (SNS) in the United Kingdom Continental Shelf (UKCS) Block 47/3.
Vessel HEAVA will be onsite at Apollo for well maintenance in the Apollo field from the 12th June at the earliest for a period of ~39 days. A guard vessel, kingfisher will be on site from the 12th of June.
A 500m exclusion zone around the HEAVA will be active during this period.
See detailed map on our bulletin website
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 2026.
The Harris and Barra fields and located in Block 201/24a of the UKCS, 160km to the East of Shetland and approximately 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
Rig - Shelf Drilling Winner
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 - Seafox 7
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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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 - 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 - 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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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 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 - 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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DSV Activity - Thistle Platform
DSV operations within Thistle 500m zone conducting decommissioning operations.
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Subsea campaign to disconnect and remove Sean Field pipelines and subsea infrastructure
The project is to remove 20” and 30” pipeline tie-in spools, the Sean RD power cable, the SSIV and protection frame, the SSIV umbilical and the mooring buoys using vessels Edda Freya and Olympic Ares. Mobilisation of Olympic Ares Friday 12th June from Killingøy, Norway.
As part of field decommissioning operations, the following field infrastructure will be removed using two vessels Edda Freya and Olympic Ares over two months.
• Tie in spools from PL310 (Sean Papa to Sean Romeo production flowline)
• Tie in spools from PL311 (Sean Papa to SSIV to Bacton production flowline)
• PLU5156 (Sean Papa to Sean Romeo power cable; 4.89 km in length)
• PLU5157 (367 m Sean Papa to SSIV hydraulic umbilical; 367 m in length)
• SSIV
• Mooring buoys
In order to gain access to the pipeline ends, a dredger will be employed to gain access to the ends for cutting. Two 20” tie-in spools of PL310 (41 m section at the Sean Romeo end and 50 m section at the Sean Papa end), three 30” tie-in spools (two 10 m sections at the SSIV end and one 65 m at the Sean Papa end) will then be cut and recovered. The pipeline spools will be recovered to the vessel deck in 10 m sections. Once recovered, the remaining pipeline ends will be remediated with two tonne rock bags.
See detailed map on our bulletin website
Stena Don Anchors in Penguin Field in Northern North Sea
Stena Don has finished its scope at Pan NW. The pre-lay anchors will remain installed whilst the rig is 9.2km South East at the Penguin Adelie location. The anchor spread could remain at the location without the rig until 31st October until the Stena Don returns.
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Subsea Well Abandonment including diving operations - Strathspey Field
Subsea well plug and abandonment operations at the Strathspey Field, using a Light Weight Intervention Vessel
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Pipeline Inspections with Remotely Operated Vehicle (ROV) - Carrack to Clipper
Conducting Visual Pipeline Inspections of existing pipelines with a vessel equipped with a remotely operated vehicle.
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Site survey in Norwegian Blocks 15/8 & 9 - EQ26043
The EQ26043 site survey in Norwegian blocks 15/8 & 9 (Norwegian PL1200) is an ordinary site survey in preparations for a drilling well in ’2027 or ’2028.
EQ26043 Site Survey will be carried out by M/V “Ocean Geograph”.
During the survey acquisition the following towed equipment will be used:
- 2D HR Seismic 1200 m streamer
- 2D UHR seismic 100 m streamer
- Side Scan Sonar
The following Hull Mounted equipment will be used:
- Sub-Bottom-Profiler
- Multibeam Echosounder
- Single beam Echosounder
In addition, there will be two CPT measurements of the seabed.
Survey Contractor is Gardline Limited – Great Yarmouth
Survey Vessel deatails:
- Callsign: C6JC4
- Vessel Phones: +44 20 3695 1403/1404/1405/1410
- VHF: Channel 16
- IMO: 9267388
Riser removal activities in block 204/20 - Schiehallion Field
Riser removal activities in block 204/20
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Installation of Flexible and Umbilical Riser System at the Rosebank field.
Installation of 5 flexible risers (2-off including short flowline sections extending to Template B) and 1 dynamic umbilical at the Rosebank FPSO in location
Skandi Africa call sign C6BU7
Will conduct the operations of the installation of the 5 flexible risers (/part flowline for 2 off) and 1 dynamic umbilical to the Rosebank FPSO when in location in the Rosebank field.
Surveys will be undertaken following the installation. As part of this scope there will also be flushing only with leak testing of the lines undertaken from the FPSO with subsea observations/interventions (as required) by a separate vessel.
Note: Scope will involve temporary installation aids (i.e. deployment and recovery of Sinking Clumpweights and turning bollards).
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FPSO Location / Hang-Off – Hold Back Pile – Tie-in Point |
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Item |
Seabed Tie-in Location (at Seabed) |
Mid Route (Seabed) / Hold Back Pile (at Seabed) |
FPSO Tie-in Location (at Surface) |
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Dynamic Umbilical |
61° 00′ 04.41″ N 3° 47′ 22.49″ W |
61° 00′ 14.70″ N 3° 47′ 08.63″ W |
60° 59′ 55.93″ N 3° 46′ 32.17″ W |
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9” Production Riser/Flowline (PR3) |
61° 00′ 41.50″ N 3° 47′ 47.14″ W |
61° 00′ 09.06″ N 3° 47′ 00.49″ W |
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9” Production Riser/Flowline (PR5) |
60° 59′ 58.05″ N 3° 46′ 50.43″ W |
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10” Gas Export Riser |
60° 59′ 32.10″ N 3° 45′ 46.49″ W |
61° 00′ 01.18″ N 3° 45′ 54.89″ W |
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6” Gas Lift Riser |
60° 59′ 52.82″ N 3° 45′ 55.57″ W |
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10” Water Injections Riser |
61° 00′ 02.23″ N 3° 44′ 37.99″ W |
61° 00′ 08.75″ N 3° 46′ 06.08″ W |
See detailed map on our bulletin website
Solan Topsides and Upper Jacket Decommissioning
The Sleipnir semi-submersible crane vessel (SSCV) will be completing topsides and upper jacket removal in the Solan field.
The Sleipnir SSCV will be mobilising to the Solan field around the 8th June to complete topsides and upper jacket removal. Operations will take apporximately 30 days. The vessel will then travel to the Vats yard in Norway.
See detailed map on our bulletin website
Infill Drilling - Cygnus Alpha
The Valaris Norway is located adjacent to the Cygnus Alpha Wellhead platform and will be operating within the 500m zone. Anchors may extend beyond this point. *Please be advised that there is a slight delay between Cygnus A and Valaris Norway and Navaid lights activation. An approved dispensation is in place under CL/63/8*
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Stena Don in Penguin Field in Northern North Sea - Adelie Well Site.
Stena Don in the Penguin Field in the Northern North Sea at Adelie well. Pre-lay anchors will be installed week starting 17th May. Stena Don estimated to be at well centre in June. Scope expected to last upto 120days.
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Trenchless Crossing of the River Dee - Liverpool Bay
Mariners are advised that United Infrastructure will be carrying out pipeline installation works on behalf of Liverpool Bay CCS Ltd under the River Dee. This work is trenchless and will not interrupt navigation.
United Infrastructure (formerly United Living Infrastructure Services) is the main contractor for the Project responsible for the design, procurement and construction of the pipeline and associated infrastructure on behalf of the Licence Holder Liverpool Bay CCS Limited.
The pipeline installation under the River Dee will be carried using a trenchless crossingmethod employing a Herrenknecht (HK) Direct Pipe machine (similar to Horizontal DirectionalDrill).The launch pit will be located approximately 240 metres from the flood defence, and thereception pit approximately 190 metres from the flood defence. So the associated compoundsand works will be set back over 16m from the flood defences and banks of the River Dee.
Thepipeline will be installed greater than 15m below the river bed and there will not be any activities within 16m of the flood banks or within the channel of the River Dee.It is our intension to commence works as soon as condition 3.18 of the Marine Licence has been discharged. Some site preparation works will start at compounds during weekcommencing 18/05/26. With works under the River Dee scheduled to commence 10/06/26 with an estimated duration of 6 weeks.
See detailed map on our bulletin website
NEP Endurance Area - PAM Service Update - As-Laid Positions
Mariners are hereby advised that the Northern Endurance Partnership (NEP) is continuing to undertake an Offshore Passive Acoustic Monitoring (PAM) Survey within the Southern North Sea. This survey deployed of a series of PAM moorings to support ongoing environmental monitoring activities.
The Acoustic Spatial Capture- Re-Capture (ASCR) Array has now been redeployed.
The planned deployment the Seabed Landers has been delayed estimated to take place ~ August – September 2026.
Seabed moorings and Cardinal buoys remained in their original positions after servicing.
All moorings will remain in place throughout the remaining ~5-month monitoring period.
As-Laid coordinates of all equipment are provided in Table 1, Table 2 and Table 3 and are illustrated in Figures 1 and 2 within the attached notice.
Mariners are advised to maintain a safe distance from the deployment locations at all times.
See detailed map on our bulletin website
Decommissioning Works - North Cormorant
The CSV Oceanic is currently on site, carrying out Top Side preparation activities as part of the removal process for the Top Side of the installation. Once these preparation works are completed, the Pioneering Spirit will be mobilised to attend and execute the actual removal of the Top Side.
The CSV Oceanic will be carrying out the first stage of work within the North Cormorant 500m Zone, and I’d like to highlight that there is a dedicated ERRV in place to support the entire workscope. Once these preparation activities are completed, the Pioneering Spirit will attend to remove the topside as planned.
See detailed map on our bulletin website
Arrival of Petrojarl Rosebank FPSO at the Rosebank Field
The Petrojarl Rosebank FPSO will arrive on station at the Rosebank Field at the earliest on the 25th of May 2026.
The Petrojarl Rosebank FPSO will arrive on station at the Rosebank Field at the earliest on the 25th of May 2026 for hook up and commissioning ready for full production at the end of 2026.
See detailed map on our bulletin website
OBN survey VIR26001 – Frigg
Viridien is planning to undertake an ocean bottom node (OBN) survey over the Frigg field area in both Norway and UK waters from 1st May until mid-August for up to 110 days. The survey will cover UKCS blocks 3/30, 4/46, 9/5, 9/10, 10/1 & 10/6 and Norway blocks 25/1-2 & 30/10-11.
This OBN survey will utilise three vessels: Siddis Mariner (node handling), Sanco Sword (seismic source) and Tanux III (support vessel).
Siddis Mariner will deploy acoustic sensors (nodes) using ROV’s on the seafloor around the Odin and Frigg fields, starting at the northern edge of the survey area. The nodes will be deployed 200m apart in lines up to 25km in length, with a line separation of 200m. Up to 25 lines of nodes are deployed at once.
Working in tandem with the Siddis Mariner, Sanco Sword will deploy a 200m towed 800 cubic inch seismic source up to 5km around and over the deployed node patch in an east / west direction, gradually moving southwards with each line. Once a node line has been covered by the seismic source, each node is recovered by ROV and processed for use on another section of the survey.
Tanux III will act as the support vessel for both Siddis Mariner and Sanco Sword.
Please note that the area defined in this notification will not be restricted in its entirety to fishing vessels for the duration of the survey. The rolling node area will only restrict access to a smaller section. FLOs will be placed on board Siddis Mariner and Sanco Sword to assist with fisheries on site.
Siddis Mariner: Call Sign LAIY3, IMO 9475181, captain@mariner.ohmeling.no, Tel +47 51 22 90 29
Sanco Sword: Call Sign ZDNE 7, IMO 9662100, Captain.sword@sanco.no, Tel +47 23 67 30 65
Tanux III: Call Sign V7MP4, IMO 9392406, Tanux3@uksnoy.no, Tel +87 07 73 23 14 41
See detailed map on our bulletin website
Acoustic Monitor - Culzean Field
In preparation for the installation of a floating Wind Turbine at Culzean - an acoustic device will be deployed near to the proposed wind turbine location at the Culzean field. The acoustic device will be at the location noted below - but will extend to a total height of 25m above the seabed. The device will deployed from 19th April 2026 (depending on weather) and will be in place for approx. six months.
In preparation for the installation of a floating Wind Turbine at Culzean - an acoustic device will be deployed near to the proposed wind turbine location at the Culzean field. The acoustic device will be at the location noted below - but will extend to a total height of 25m above the seabed. The device will deployed from 19th April 2026 (depending on weather) and will be in place for approx. six months.
See detailed map on our bulletin website
Preparation of and Removal of Offshore Installation Hewett 48/29A by Heavy Lift Vessels
Heavy Lift Vessels (HLVs) the Scaldis Rambiz and Gulliver will be mobilising the Hewett field to prepare the 48/29A Complex for removal. Once preparations have been completed the topsides and jackets will be removed and transported onshore for final disposal.
The HLVs will be moblising to the Hewett feild in on or around the 1st of April. The HLVs will be completing preparation activites, and lifting and removing the topsides and jackets in the period April to August 2026.
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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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
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
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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