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Radio Navigational Warnings

We act as the NAVAREA I (NE Atlantic) Co-ordinator for the International Maritime Organization (IMO) and International Hydrographic Organization (IHO) Worldwide Navigational Warning Service (WWNWS) and also as the United Kingdom National Co-ordinator for issuing coastal navigational warnings.

Whilst the UKHO will attempt to keep this site up-to-date by adding and cancelling navigational warnings in real time, for reasons beyond its control, this may not always be possible. The approved method of receiving Maritime Safety Information (MSI) is via the appropriate IMO, Global Maritime Distress and Safety System (GMDSS) broadcast systems as defined by the WWNWS. The provision of navigational warnings on this website is not intended to be a substitute for, or an alternative to, the International SafetyNET service or the International NAVTEX service, and does not relieve Masters/Captains of their responsibility to monitor MSI broadcasts in accordance with the provisions of SOLAS.

Many warnings are of a temporary nature, but others may remain in force for several weeks and may be superseded by Notices to Mariners.

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The following NAVAREA I and UK Coastal Warnings (WZs) were in force at: 270600 UTC MAY 16
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078/16 * 270500 UTC May 16 * RIGLIST. Correct at 270500 UTC MAY 16.

270500 UTC May 16

1. RIGLIST. Correct at 230500 UTC MAY 16.
         Southern North Sea: 51N to 55N
         53-04.9N 002-10.9E   Seafox 4 ACP Leman Gas Field
         53-13.1N 003-55.2E   Swift 10 ACP K15-FK1 NL Sector
         53-15.4N 001-58.2E   Ensco 92 ACP Vulcan Gas Field 
         53-28.5N 002-13.9E   GMS Endurance 6101 ACP Viking Gas Field
         53-33.0N 003-16.0E   Ensco 122 ACP K7-FD1 NL Sector
         53-37.8N 005-08.5E   Paragon C461 ACP M7-A NL Sector
         53-41.7N 003-20.3E   GMS Endeavour 6102 ACP L4A NL Sector
         53-44.8N 003-37.0E   Paragon C20051
         54-17.3N 002-28.2E   Paragon HZ1 
         54-27.0N 002-28.9E   Seafox 1 ACP Tyne Gas Field
         54-34.1N 002-18.1E   Seafox 2 ACP Cygnus A APU UK Sector
         54-34.2N 002-17.5E   Seafox 7 ACP Cygnus APU UK Sector
         54-34.2N 002-17.6E   Ensco 102 ACP Cygnus APU UK Sector
         54-36.0N 002-11.8E   Ensco 80 ACP Cygnus B WHP UK Sector 
         North Sea: 55N to 60N, East of 5W
         55-28.7N 005-06.5E   Ensco 71 ACP Dan Oil Field
         55-28.8N 005-06.6E   Atlantic Amsterdam ACP Dan Oil Field
         55-38.4N 004-53.1E   Noble Sam Turner ACP Tyra Gas Field
         55-43.0N 004-45.0E   Seafox 5 ACP Tyra Gas Field
         55-43.2N 004-48.0E   Ensco 72 ACP Tyra Gas Field
         55-43.3N 004-48.2E   COSL Rigmar ACP Tyra Gas Field
         55-52.9N 004-14.0E   Ensco 121 alongside platform u/c Danish Sector
         56-05.7N 004-13.2E   Maersk Resolute ACP Syd Arne Gas Field
         56-10.4N 004-10.5E   Maersk Resilient ACP Svend Oil Field
         56-14.8N 003-57.6E   Maersk Resolve ACP under construction
         56-16.9N 003-23.8E   Maersk Reacher ACP Valhall Oil Field
         56-22.6N 003-15.5E   Maersk Innovator ACP Eldfisk Oil Field
         56-29.0N 004-54.7E   Maersk Giant ACP Siri Gas Field
         56-31.2N 003-13.3E   Rowan Gorilla 6 ACP Ekofisk Oil Field
         56-32.8N 003-13.2E   Rowan Norway ACP Ekofisk Oil Field
         56-41.8N 002-20.3E   COSL Rival ACP Judy Oil Field
         56-43.8N 002-38.8E   Maersk Gallant         
         56-44.6N 000-40.7E   Ensco 100
         56-57.6N 001-48.4E   Rowan Gorilla 5 ACP Franklin Gas Field
         56-58.0N 001-52.1E   Prospector 1 ACP Franklin Gas Field
         57-00.8N 001-50.4E   GSF Galaxy 1 ACP Elgin Gas Field
         57-00.8N 001-50.5E   Prospector 5 ACP Elgin Gas Field
         57-01.9N 001-57.3E   Noble Hans Deul ACP Shearwater Oil Field
         57-17.5N 001-39.6E   Safe Caledonia ACP Marnock Oil Field
         57-17.9N 001-21.9E   Sedco 712
         57-21.3N 001-52.7E   Byford Dolphin
         57-22.5N 001-59.8E   Ensco 101 ACP Mungo Oil Field
         57-22.9N 000-43.1E   Stena Spey
         57-43.0N 001-21.0E   Rowan Gorilla 7
         57-45.5N 001-47.9E   Safe Bristolia ACP Everest Gas Field
         57-56.3N 000-51.0E   Sedco 704
         57-57.7N 000-55.0W   Ensco 120 ACP Golden Eagle Oil & Gas Field
         58-06.1N 000-41.7E   Blackford Dolphin
         58-34.3N 001-41.8E   Maersk Integrator ACP Gina Krog under construction
         58-42.4N 002-09.8E   Bredford Dolphin
         58-50.6N 002-14.9E   Rowan Viking ACP Edvard Grieg under construction
         58-50.7N 001-44.5E   West Epsilon ACP Gudrun Oil & Gas Field
         59-12.3N 002-26.9E   West Alpha
         59-29.7N 001-58.0E   Transocean Winner
         59-31.9N 001-24.4E   Ocean Patriot
         59-53.5N 001-12.3E   Transocean Leader
         Norwegian Sea: 60N to 65N, East of 5W
         60-03.8N 003-58.5W   Ocean Valiant ACP Solan Gas Field
         60-09.9N 002-35.6E   Songa Delta
         60-19.5N 004-05.6W   Deepsea Aberdeen
         60-19.7N 004-09.7W   Paul B Loyd Jr. ACP Schiehallion Oil Field          
         60-30.3N 002-00.8E   Maersk Intrepid ACP Martin Linge Norwegian Sector
         60-37.7N 001-39.2E   Borgsten Dolphin ACP Dunbar Oil Field
         60-41.9N 002-55.9E   Safe Scandinavia ACP Oseberg Oil Field
         60-44.2N 002-29.9W   Floatel Victory ACP under construction Claire Ridge Oil Field
         60-45.3N 003-38.2E   COSL Promoter
         60-52.3N 003-08.2W   West Phoenix
         60-53.3N 003-33.9E   Songa Equinox
         60-54.9N 003-37.5E   Stena Don
         61-02.3N 002-20.3E   West Elara ACP Kvitebjorn Gas Field
         61-05.8N 002-11.6E   Songa Dee
         61-10.2N 002-25.5W   Deepsea Stavanger
         61-11.8N 000-43.8E   Ocean Guardian
         61-23.6N 002-07.5E   Bideford Dolphin

         South and West Coasts of the British Isles.
         53-37.9N 003-10.6W   Irish Sea Pioneer ACP Lennox Gas Field
A. Rigs are protected by a 500 metre safety zone.
B. ACP - Adjacent to Charted Platform.
C. For Rigs located North of 65N, East of 5W, refer to Navarea XIX Warnings or visit
2. Cancel Navarea I 076/16.


077/16 * 250240 UTC May 16 * NORTH SEA, NORWEGIAN SECTOR. Seismic survey by Polarcus Naila.

250240 UTC May 16

Chart BA 2673.
Seismic survey in progress by Polarcus Naila towing 10 x 3000 metre long cables within area bounded by 60-30N, 61-10N, 003-06E and 004-00E.  Guard vessels in attendance.  3 mile berth requested.

074/16 * 170355 UTC May 16 * ENGLAND, EAST COAST. Outer Gabbard. 2 special light-buoys established.

170355 UTC May 16

Approaches to Thames Estuary.  Outer Gabbard.
Chart BA 1610 (INT 1511).
 Special light-buoy, Fl(5)Y.20secs, established at 51-57.4N 002-06.6E and at 51-57.1N 002-06.5E.

061/16 * 241455 UTC Apr 16 * ENGLAND EAST COAST. Approaches to Great Yarmouth, Middle Cross Sand, changes to buoyage.

241455 UTC Apr 16

Approaches to Great Yarmouth, Middle Cross Sand.
Chart BA 1543.
1. East Cross Sand Light-buoy moved 1.6 miles North to 52-40.05N 001-53.80E.
2. Barley South Cardinal Light-buoy, Q(6)+L.Fl.15s, established in 52-38.05N 001-52.90E.

060/16 * 230200 UTC Apr 16 * THAMES ESTUARY. Sunk Inner Precautionary Area. Buoyage relocated.

230200 UTC Apr 16


Sunk Inner Precautionary Area. 

Chart BA 2692.

1. Black Deep light-buoy moved close NE to 51-48.26N 001-36.86E.

2. Long Sand Head light-buoy moved close N to 51-48.06N 001-39.40E.

237/15 * 180905 UTC Aug 15 * SCOTLAND, EAST COAST. Firth of Forth. Range of Isle of May Light temporarily reduced.

180905 UTC Aug 15

Firth of Forth.
Chart BA 175.
Isle of May light 56-11.1N 002-33.5W, range temporarily reduced to 10 miles.

192/15 * 091430 UTC Jul 15 * NORTH SEA, UK SECTOR. MacCulloch Oil Field. Decommissioning of FPSO North Sea Producer in progress.

091430 UTC Jul 15

MacCulloch Oil Field.
Chart BA 291.
Decommissioning of FPSO North Sea Producer 58-19.4N 000-43.6E in progress.
Mariners are requested to avoid an area radius 1.5 miles centred at this position.

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