View Map 
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
NEP Pre-lay Mattress Installation and Boulder Relocation
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking outcrop crossing mattress installation and boulder relocation activities within the NEP pipeline construction area as part of the pre-lay pipeline construction activities. The works will be undertaken by the EDT Hercules and are anticipated to begin on June 19th, 2026, for an estimated 14 days (weather dependant)
Mariners are advised to always maintain a safe distance (of at least 500m) from the EDT Hercules.
The operations will be conducted within fishing Blocks 1-5. These locations are shown within the attached notice - Figure 1 and Table 1.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer.
See detailed map on our bulletin website
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
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.
Show More
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
Subsea IRM Activities - Schiehallion Area
Subsea IRM (Inspection Repair Maintenance) activities are being undertaken in the Schiehallion area.
Show More
Biological Survey - NEP Expansion Nearshore
Mariners are advised that the Northern Endurance Partnership (NEP) Expansion will be continuing with survey activities using the vessel Titan Discovery due to weather.
The vessel is now estimated to complete activities by the 21st June 2026 (weather dependant)
Mariners are advised to politely maintain a safe distance (of at least 500m) from the Titan Discovery.
Survey activities will be planned and work around static fishing gear to avoid disruption.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided.
See detailed map on our bulletin website
UXO Identification Survey - Liverpool Bay
Mariners are advised that Liverpool Bay CCS Ltd will continue to conduct a survey activities using the Argyll Explorer as weather has delayed the survey.
The first phase of the Unexploded Ordinance (UXO) investigation 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 within the attached notice) has been completed.
The Argyl Explorer will now continue to carry out Eboss investigations.
Mariners are advised to always maintain a safe distance (of at least 500m) from the Argyll Explorer.
For further information, contact details for the Company Fisheries Liaison Officers are provided in Section 7 of the attached notice.
See detailed map on our bulletin website
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.
Show More
NEP - Pre-pipelay Rock Installation
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking rock and gravel installation activities as part of the pre-pipelay construction activities. The works will be undertaken by the Simon Stevin and are anticipated to begin on June 1st 2026 for an approximate duration of 21 days.
Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking rock and gravel installation activities as part of the pre-pipelay construction activities. The works will be undertaken by the Simon Stevin and are anticipated to begin on June 1st 2026 for an approximate duration of 21 days.Mariners are advised to always maintain a safe distance (of at least 500m) from the Simon Stevin.The subsea rock installation operations will be conducted within fishing Blocks 2-4. These locations are shown below in Figure 1 and Table 1.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
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
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.
Show More
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.
Show More
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
NEP Confirmed Unexploded Ordnance No.2
Mariners are advised that following a UXO identification survey the vessel Olympic Taurus has identified a second confirmed UXO within Block 5of the NEP Construction Area. Further investigations are being conducted and updates will follow.
Show More
NEP Confirmed Unexploded Ordnance No. 1 - Block 3
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.
Show More
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.
Show More
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.
Show More
Rig move - Paul B Lloyd Junior and anchor locations
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
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.
Show More
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.
Show More
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
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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 - 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.
Show More
NEP Expansion Offshore Geophysical and Biological Survey
Mariners are advised that the Northern Endurance Partnership Expansion will be undertaking survey activities using the vessel Ocean Observer
Biological sampling will be preceded by geophysical investigations to select appropriate ground conditions for sampling.
An NFFO Offshore Fisheries Liaison Officer (OFLO) will be onboard the Ocean Observer. Survey activities will be planned and work around static fishing gear to avoid disruption.
The vessel is estimated to arrive on location ~21st April working 24 hours a day for ~ 58 days.
Mariners are advised to politely maintain a safe distance (of at least 500m) from the Ocean Observer.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 6 of the attached notice.
See detailed map on our bulletin website
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
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.
Show More
Offshore ROV, UXO ID Block 5 - NEP Pipeline Construction Area
Mariners are advised that the Northern Endurance Partnership (NEP) will be continuing the undertaking o an offshore Unexploded Ordinance (UXO) Investigation survey utilising?an?ROV (Remote-Operated Vehicles)?within the southern North Sea
The survey is being conducted by the vessel Glomar Wave (see section 6 within the attached notice) and will take place for a further 25 days (weather dependant) within Block 5 of the NEP Pipeline Construction Area.
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.
Mariners are advised to maintain a safe distance (of at least 500m) from the vessel at all times.
For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer which are provided within this notice.
See detailed map on our bulletin website
DSV Activity - Thistle Platform
DSV operations within Thistle 500m zone conducting decommissioning operations.
Show More
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.
Show More
Subsea Well Abandonment including diving operations - Strathspey Field
Subsea well plug and abandonment operations at the Strathspey Field, using a Light Weight Intervention Vessel
Show More
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.
Buoy Deployment Position:Latitude: 60° 00'.45.84" N Longitude: 003° 49'.27.89" W
See detailed map on our bulletin website
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.
Show More
ROV survey of Gassco operated pipelines in UKCS - Langeled South, Vesterled,Gjoa gas, Utsira high
ROV survey of UKCS sections of pipelines for Langeled South, Vesterled, Gjoa gas export and Utsira high
Pipeline survey using ROV.
Base case vessel is “Reach Remote 1” which is an unmanned vessel with 24/7 manning onshore.
Vessel Reach Remote 1 - n.b this is an unmanned vessel
Call sign JXMQ
Water depth: approx. 70-150 m
See detailed map on our bulletin website
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
Show More
Rig move - Paul B Lloyd Junior and anchor locations
This oil & gas drilling rig will move to a new location from 3rd June to 15th July. Anchors will be pre-laid 27th May. Rigs are protected by a 500m safety zone. As anchors will extend beyond this zone these are the locations provided.
P&A of the Tybalt E&A well 4z
Updated 2nd June to show actual anchor locations
See detailed map on our bulletin website
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).
|
FPSO Location / Hang-Off – Hold Back Pile – Tie-in Point |
|||
|
Item |
Seabed Tie-in Location (at Seabed) |
Mid Route (Seabed) / Hold Back Pile (at Seabed) |
FPSO Tie-in Location (at Surface) |
|
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 |
|
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 |
|
|
9” Production Riser/Flowline (PR5) |
60° 59′ 58.05″ N 3° 46′ 50.43″ W |
||
|
10” Gas Export Riser |
60° 59′ 32.10″ N 3° 45′ 46.49″ W |
61° 00′ 01.18″ N 3° 45′ 54.89″ W |
|
|
6” Gas Lift Riser |
60° 59′ 52.82″ N 3° 45′ 55.57″ W |
||
|
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
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.
Show More
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*
Show More
Rig Placement and Environmental survey - Captain Area B and C and will include Captain B15
In preparation for upcoming wells activity. Ithaca are planning Environmental survey's at Captain Area B and C and will include Captain B15. The following Quadrant/Blocks are included: 13/22 13/23 13/18 13/17 13/16 13/21
Ithaca is planning to conduct a bathymetry, debris clearance, habitat assessment and environment baseline survey in the Captain Field (over Areas B & C). The scope of the survey work will involve collection of SSS, SBES, MBES and passive magnetometer data. Video and stills photography will be undertaken at a number of environmental stations followed by grab samples.
See detailed map on our bulletin website
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.
Show More
Decommissioning Activities - 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 in early July. Activity will remain in field through July and August 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
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 - 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.
Show More
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
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 / Skandi Saltfjord
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
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
Decommissioning preparation works - Eider Alpha
The Eider Alpha upper jacket will have a construction vessel and ERRV working inside the 500m zone conducting preparation works for upper jacket removal by HLV at latter end of working window provided.
Show More
Decommissioning Geophysical Surveys - Devenick, Central Brae, West Brae & Braemar Fields
Mariners are advised that Gardline will be conducting geophysical surveys at Devenick, Central Brae, West Brae and Braemar fields with environmental sampling covering these site and East Brae, Brae Alpha and Brae Bravo. The surveys will be carried out by the Kommandor (IMO 8517205) from the 1st April 2026 lasting approximately 45 days.
Show More
Pre-laying of anchors 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.
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.
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
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
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
Swift 10 MODU on location on the Sean Papa Platform.
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 is currently on location at Sean Papa (UKCS) all navigation aids are showing unsynchronised and Navigation lights and Fog signals higher than 35 meters MHWS.
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.On Swift 10 Navigation lights and Fog signals higher than 35 meters MHWS.
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
Well Safe Defender in Magnus Field undertaking P&A Activities
Well Safe Defender will be locating to Magnus (South, F9 and F10 wells) location on or around 1 June to undertake P&A operations, for approximately 120 days. Anchors will be deployed upon arrival. 8 off anchors, each approx 1.2km from installation.
Show More
Free span - PL10 Ninian Pipeline System
Please be advised of potential hazard - Pipeline Free Span 52m in length (with one touch down point) Span height 0.5m
Show More
Rig Move and COMOPS Activity Notification - HAEVA JUB - Hoton Installation
Perenco are planning to undertake modifications to the topsides and install a conductor at Hoton utilising the HAEVA Jack-Up Barge (JUB). The HAEVA JUB will be positioned at Hoton, interfacing with the platform from the 5th April at the earliest (weather dependent).
Perenco are planning to undertake modifications to the topsides and install a conductor at Hoton utilising the HAEVA Jack-Up Barge (JUB). The HAEVA JUB will be positioned at Hoton, interfacing with the platform from the 5th April at the earliest (weather dependent). The Project is expected to last for a duration of 50 days. The HAEVA JUB occupies a much larger footprint that the Hoton installation, therefore, whilst the HAEVA JUB is on location, the HAEVA JUB Aids to Navigation (AtN) will be the sole AtNs for the duration of deployment and the Hoton platform will be blacked out. The positioning of the HAEVA JUB will require four mooring anchors which will be positioned at the following locations (ED50 UTM Grid Zone 31):
• Starboard Bow: E 382 609, N 5 963 278• Starboard Aft: E 382 056, N 5 962 750• Port Aft: E 381 446, N 5 963 440• Port Bow: E 382 038, N 5 963 924
Location Coordinates (WGS 1984):
Hoton: Latitude (WGS84): 53° 48' 10.0" N, Longitude (WGS84): 01° 12' 22.6" E HAEVA Working Position: 53° 48' 13.106" N, 001° 12' 28.308" E
See detailed map on our bulletin website
Pressure testing of Gas Export Line System at the BP WOSPS location
The vessel 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
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.
Show More
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
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
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
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
Show More
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.
Show More
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
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.
Show More
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.
Show More