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Radio Navigational Warnings (RNWs)

We act as the NAVAREA I (NE Atlantic) Co-ordinator for the International Maritime Organisation (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. For more information please see the 'About RNWs' tab below.

Low bandwidth
Information

The following NAVAREA 1 and UK Coastal Warnings (WZs) were in force at: 200809 UTC April 21

​​​​​​​​​​

Ref Date Time Group Description
WZ 455/21 192030 UTC Apr 21 IRISH SEA. Isle of Man South-eastwards. Underwater cable operations in progress by C/S Ile d'Aix.

UK Coastal

WZ 455/21

192030 UTC Apr 21

IRISH SEA. 
Isle of Man South-eastwards.
1. Underwater cable operations in progress by C/S Ile d'Aix in vicinity of 53-45.0N 003-24.3W. 
Wide berth of one mile requested.
2. Cancel WZ 454.
WZ 453/21 191555 UTC Apr 21 SCOTLAND WEST COAST. Loch Creran. Depths less than charted.

UK Coastal

WZ 453/21

191555 UTC Apr 21

​SCOTLAND WEST COAST. Loch Creran.
Depths less than charted reported in vicinity 56-31.2N 004-21.6W, least depth 3m.
NAVAREA I 048/21 190500 UTC Apr 21 RIGLIST. Correct at 190500 UTC Apr 21.

NAVAREA 1

NAVAREA I 048/21

190500 UTC Apr 21

​NAVAREA I 048/21
1. RIGLIST. Correct at 190500 UTC Apr 21.

                    Southern North Sea: 51N to 55N
                    53-05.8N 001-45.8E   Valaris 72 ACP Hewett Gas Field
                    53-14.0N 003-14.5E   590021
                    53-18.3N 001-23.1E   Noble Hans Deul
                    53-24.1N 002-39.4E   Seafox 4 ACP Brigantine Gas Field
                    53-32.4N 002-11.8E   Ensco 92
                    53-36.6N 000-43.4E   Haeva ACP Amethyst Gas Field
                    53-38.7N 000-36.2E   Erda ACP Amethyst Gas Field
                    53-43.0N 002-51.3E   Maersk Resolve ACP Grove Gas Field
                    53-46.1N 006-17.7E   Prospector 1
                    53-59.7N 006-25.2E   Seafox 2 ACP DolWin gamma platform
                    54-02.5N 000-26.5E   Valaris 123

                    North Sea: 55N to 60N, East of 5W 
         NEW   56-19.3N 003-21.1E   Maersk Invincible ACP Valhall Oil Field
                    56-43.5N 002-12.5E   Ensco 120 ACP Jasmine Gas Field
                    57-00.8N 001-50.5E   Maersk Highlander ACP Culzean Gas Field
                    57-01.3N 001-48.0E   Safe Caledonia
                    57-01.8N 001-57.1E   Safe Zephyrus ACP Shearwater Oil Field
                    57-01.9N 001-57.3E   Valaris 122 ACP Shearwater Oil Field
         NEW  57-06.7N 002-50.8E   Maersk Integrator ACP Tambar Oil Field
                    57-08.0N 001-08.7E   Prospector 5
                    57-09.2N 001-40.4E   Valaris Gorilla VI
                    57-21.0N 002-05.2E   Maersk Resilient
                    57-29.0N 002-03.1E   Ocean Endeavor
                    57-45.0N 001-04.8E   Ocean Patriot
                    57-48.9N 004-32.0E   Maersk Inspirer ACP YME platform
                    57-57.6N 000-55.1W   Noble Sam Hartley ACP Golden Eagle Oil and Gas Field
                    58-08.0N 001-55.8E   COSL Innovator
                    58-19.5N 000-41.9E   Paul B Loyd Junior
          NEW  58-48.8N 002-16.1E   West Bollsta
                    58-50.5N 002-14.9E   Rowan Viking alongside platform under construction, Norwegian Sector
                    58-50.7N 001-44.6E   Rowan Stavanger ACP Gudrun Oil and Gas Field
                    59-17.5N 002-22.5E   Scarabeo 8
                                        
                    Norwegian Sea: 60N to 65N, East of 5W
                    60-27.4N 002-41.6E   Askepott
                    60-30.4N 002-00.9E   Maersk Intrepid ACP Martin Linge platform
                    60-46.1N 003-36.6E   COSL Promoter
          NEW  60-48.5N 003-33.4E   Transocean Equinox
                    60-53.5N 003-40.2E   Transocean Endurance
                    61-16.6N 003-39.8E   West Mira
                    61-20.7N 002-04.3E   Deepsea Atlantic
                    61-24.0N 004-03.9E   Deepsea Yantai
                    61-29.7N 002-08.8E   Transocean Spitsbergen
                    61-36.1N 002-44.4E   West Hercules
                    64-53.2N 007-04.1E   Transocean Norge

                    South and West Coasts of the British Isles
          NEW  51-19.6N 008-05.9W  Stena Spey ACP Kinsale Head Gas Field  
                    53-48.5N 003-39.9W   Seajacks Leviathan ACP Calder Gas Field
                    53-48.9N 003-33.6W   JB-115 ACP DP3 South Morecambe Gas Field

NOTES:
A. Rigs are protected by a 500 metre safety zone.
B. Abbreviations: ACP - Adjacent to Charted Platform.
C. For Rigs located North of 65N, East of 5W, refer to Navarea XIX Warnings or visit www.navarea-xix.no

2. Cancel Navarea I 044/21.
WZ 450/21 190000 UTC Apr 21 SCOTLAND, WEST COAST. Outer Hebrides, GPS jamming exercise in progress.

UK Coastal

WZ 450/21

190000 UTC Apr 21

SCOTLAND, WEST COAST.
Outer Hebrides. 
1. GPS jamming exercise in progress between 0700 UTC and 1700 UTC, 19 to 23 Apr, in the following areas:
A) within 25 miles of 57-19N  007-22W.
B) within 50 miles of 57-19N  007-22W in an arc from 230 degrees, clockwise to 345 degrees.
2. Alternative means of navigation should be used during jamming periods to confirm position. GPS equipment should be checked for correct operation either when clear of the affected area or on completion of the exercise.
3. Vessels are advised to avoid approaching within 1 mile of the RN Warship operating in the vicinity of the above position.
4. In an emergency jamming may be stopped on request via Range Operations on 01870 604441 or Jamming Control Authority on 01980 951573, or maritime distress frequencies using the phrase ‘emergency cease jam’.
5. Cancel this message 231800 UTC Apr 21.
WZ 445/21 171640 UTC Apr 21 WALES, NORTH COAST. Colwyn Bay Northwards. Temporary prohibited area and Emergency Wreck Marking Light-buoys established.

UK Coastal

WZ 445/21

171640 UTC Apr 21

​WALES, NORTH COAST.
Colwyn Bay Northwards.
1. Temporary prohibited area of radius 200 metres established, centred on the wreck of F/V Nicola Faith, located in 53-20.02N 003-41.88W.
2. Vessels are prohibited from interfering with, or anchoring, fishing or trawling in the vicinity of the wreck without permission from the Marine Accident Investigation Branch.
3. Failure to comply with this direction is a criminal offence.
4. Two Emergency Wreck Marking Light-buoys established north and south of wreck.
5. Cancel WZ 392.

WZ 442/21 170545 UTC Apr 21 GMDSS. Falmouth Coastguard. VHF R/T service from Trevose site, St.Ives site, unstable.

UK Coastal

WZ 442/21

170545 UTC Apr 21

GMDSS.
Falmouth Coastguard.
1. VHF R/T service from Trevose site, 50-32.9N 005-02.0W, unstable.
2. VHF R/T service from St.Ives site, 50-13.1N 005-28.6W, unstable.
3. VHF R/T and DSC services from Combe Martin site, normal conditions restored.
4. Cancel WZ 440.

NAVAREA I 047/21 161000 UTC Apr 21 NAVAREA I WARNINGS IN FORCE AT 161000 UTC APR 21

NAVAREA 1

NAVAREA I 047/21

161000 UTC Apr 21

NAVAREA I 047/21

1. NAVAREA I WARNINGS IN FORCE AT 161000 UTC APR 21:
2021 SERIES: 015, 031, 044, 045, 046, 047.

NOTES:
A. Texts of NAVAREA I Warnings issued each week are published in weekly editions of the ADMIRALTY Notices to Mariners bulletin (ANMB).
B. NAVAREA I Warnings less than 42 days old (031/21 onward) are promulgated via Enhanced Group Call (EGC) and/or relevant NAVTEX transmitters.
C. The complete texts of all in-force NAVAREA I warnings, including those which are no longer being broadcast, are reprinted in Section III of ANMB in weeks 1, 13, 26 and 39 and are also available from the UKHO website at: www.admiralty.co.uk/RNW.
Alternatively, these may be requested by e-mail from NAVAREA I Co-ordinator at: navwarnings@ukho.gov.uk

2. Cancel NAVAREA I 043/21.
WZ 428/21 142030 UTC Apr 21 WALES, WEST COAST. Cardigan Bay, Saint Tudwal's Islands. West Island light, ranges reduced to 9 and 5 miles.

UK Coastal

WZ 428/21

142030 UTC Apr 21

WALES, WEST COAST.
Cardigan Bay, Saint Tudwal's Islands.
West Island light, 52-47.9N 004-28.3W, ranges temporarily reduced to 9 and 5 miles.
NAVAREA I 046/21 141730 UTC Apr 21 NORTH SEA, UK SECTOR. Cromer Knoll Eastwards. Safety Zone established.

NAVAREA 1

NAVAREA I 046/21

141730 UTC Apr 21

​NORTH SEA, UK SECTOR.
Cromer Knoll Eastwards.
Chart GB 105.
Safety Zone, radius 500 metres, established centered on 53-18.3N 001-23.2E.
WZ 423/21 141445 UTC Apr 21 SCOTLAND, WEST COAST. Isle of Skye, Loch Dunvegan. Uiginish Point Light, light unreliable.

UK Coastal

WZ 423/21

141445 UTC Apr 21

​SCOTLAND, WEST COAST.
Isle of Skye, Loch Dunvegan.
Uiginish Point Light, 57-26.8N 006-36.6W, light unreliable.
NAVAREA I 045/21 131300 UTC Apr 21 NORTH SEA, UK SECTOR. Seismic survey by S/V Ramform Hyperion.

NAVAREA 1

NAVAREA I 045/21

131300 UTC Apr 21

​NORTH SEA, UK SECTOR.
1. Seismic survey by S/V Ramform Hyperion towing 12 x 6000 metre cables in progress in an area bounded by 56-55.9N 000-30.1E, 56-55.9N 000-55.4E, 56-37.1N 000-55.6E, 56-37.1N 000-30.1E and 56-55.9N 000-30.1E.
2. A wide berth of 3NM from the bow and side, and 7NM from her stern is requested.
WZ 416/21 121525 UTC Apr 21 ENGLAND, EAST COAST. Southwold eastwards and Deep Water routes. . Survey operations in progress.

UK Coastal

WZ 416/21

121525 UTC Apr 21

ENGLAND, EAST COAST.  Southwold eastwards and Deep Water routes.
1. Survey operations in progress by S/V Fugro Frontier, Fugro Venturer and Fugro Searcher, towing survey equipment astern in an area bounded by 52-21.3N 001-44.4E, 52-30.4N 002-43.8E, 52-45.1N 002-44.4E, 52-46.3N 003-02.8E, 51-58.3N 002-16.2E and 52-08.4N 001-39.1E. Wide berth is requested.
2.  Cancel this message 120001Z July 21.
WZ 413/21 112330 UTC Apr 21 ENGLAND, SOUTH COAST. Lyme Bay. Intermittent GPS Jamming exercise.

UK Coastal

WZ 413/21

112330 UTC Apr 21

​ENGLAND, SOUTH COAST.
Lyme Bay.
1. Intermittent GPS Jamming exercise, 12 Apr to 07 May from 0800 UTC to 2000 UTC within area bounded by 50-30N 003-17W, 50-34N 003-05W, 50-34N 002-45W, 50-25N 002-15W, 50-02N 002-15W, 50-02N 002-58W and 50-25N 003-17W.
2. Alternative means of navigation should be used during jamming periods to confirm position. GPS equipment should be checked for correct operation either when clear of the affected area or on completion of the exercise.
3. In an emergency jamming may be stopped on request via FOST Duty Ops on 01752 557550 or by calling ‘FOST Ops’ on VHF Ch 74.
4. Cancel this message 072100 UTC May 21.
WZ 412/21 110825 UTC Apr 21 SOUTHERN NORTH SEA. Leman Gas Field. Platforms 49/27-H and 49/27-ED, unlit and all navaids inoperative.

UK Coastal

WZ 412/21

110825 UTC Apr 21

​SOUTHERN NORTH SEA. Leman Gas Field.
1. Platform 49/27-H, 53-00.3N 002-12.9E, unlit and all navaids inoperative.
2. Platform 49/27-ED, 53-03.6N 002-12.6E, unlit and all navaids inoperative.
3. Cancel WZ 274.
WZ 411/21 110745 UTC Apr 21 IRISH SEA, EASTERN PART. Millom Gas Field. Platform 113/26, all navaids inoperative.

UK Coastal

WZ 411/21

110745 UTC Apr 21

​IRISH SEA, EASTERN PART.
Millom Gas Field.
Platform 113/26, 54-01.6N 003-51.7W, all navaids inoperative.
2. Cancel WZ 391.
WZ 396/21 071645 UTC Apr 21 ENGLAND, East Coast. Hewett Gas Field. Gas pipeline unsecure. Vessels advised to keep clear.

UK Coastal

WZ 396/21

071645 UTC Apr 21

ENGLAND, East Coast.
Hewett Gas Field.
1. Gas pipeline unsecure on seabed at 53-01.2N 001-44.9E with risk of rupturing.
2. Vessels are advised to keep clear of the area.
3. Cancel WZ 221.

 
WZ 388/21 060815 UTC Apr 21 ENGLAND, EAST COAST. Haisborough Sand Northwards. Hewett Gas Field. Platform 48/29-B, unlit and all navaids inoperative.

UK Coastal

WZ 388/21

060815 UTC Apr 21

​ENGLAND, EAST COAST.
Haisborough Sand Northwards.
Hewett Gas Field.
Platform 48/29-B, 53-03.3N 001-41.1E, unlit and all navaids inoperative.
WZ 371/21 021800 UTC Apr 21 BRITISH ISLES, NORTHERN PART. DGPS service from Stirling, reduced power.

UK Coastal

WZ 371/21

021800 UTC Apr 21

​BRITISH ISLES, NORTHERN PART.
1. DGPS service from Stirling, 56-04.3N 004-03.6W, reduced power.
2. Cancel WZ 367.
WZ 366/21 011925 UTC Apr 21 SCOTLAND, EAST COAST. Aberdeen North-eastwards. Aberdeen Offshore Wind Farm. Turbine, foghorn inoperative.

UK Coastal

WZ 366/21

011925 UTC Apr 21

​SCOTLAND, EAST COAST.
Aberdeen North-eastwards.
Aberdeen Offshore Wind Farm.
Turbine in 57-13.0N 001-59.1W, foghorn inoperative.
WZ 354/21 282105 UTC Mar 21 SCOTLAND, WEST COAST. Loch Linnhe. Rubha Cuil-cheanna. Two new lights established.

UK Coastal

WZ 354/21

282105 UTC Mar 21

​SCOTLAND, WEST COAST.
Loch Linnhe.
Rubha Cuil-cheanna.
1. Two new lights established in 56-42.31N 005-14.80W:
A. Directional White/Red/Green 2 seconds, 12 metres, 5 miles night and 1.7 miles day with sectors in degrees as follows: Isophase Red 190.5 -192.5, Alternating White/Red 192.5 -193.5, Isophase White 193.5-194.5, Alternating Green/White 194.5 -195.5 and Isophase Green 195.5 -197.5.
B. Flash two, Green, 8 seconds, 12 metres, 5 miles.
2. Cancel WZ 352.
WZ 339/21 251145 UTC Mar 21 IRELAND, EAST COAST. Southern Approaches to Dublin Bay. Survey operations in progress.

UK Coastal

WZ 339/21

251145 UTC Mar 21

IRELAND, EAST COAST. 
Southern Approaches to Dublin Bay.
1. Survey operations in progress by Fugro Mercator, Fugro Seeker and Spectrum 1 within the sea area westwards of a line joining 53-19.3N 005-53.6W, 53-14.1N 005-51.6W and 53-08.9N 005-51.7W. 
Irish Department of Transport Marine Notice No. 6 of 2021 refers.
2. Cancel WZ 162.
WZ 337/21 241115 UTC Mar 21 NORTH SEA, UK SECTOR. Wenlock Gas Field. Platform 49/12A, unlit and all navaids inoperative

UK Coastal

WZ 337/21

241115 UTC Mar 21

NORTH SEA, UK SECTOR.
Wenlock Gas Field.
Platform 49/12A, 55-35.3N 002-17.6E, unlit and all navaids inoperative.

WZ 336/21 240950 UTC Mar 21 ENGLISH CHANNEL, EASTERN PART. Dover Strait TSS. Ridens SE light-buoy, AIS off-air.

UK Coastal

WZ 336/21

240950 UTC Mar 21

​ENGLISH CHANNEL, EASTERN PART.
Dover Strait TSS.
Ridens SE light-buoy, 50-43.4N 001-19.0E, AIS off-air.
WZ 312/21 191640 UTC Mar 21 NORTH SEA, UK SECTOR. Galleon Gas Field. Platform 48/20-PN unlit.

UK Coastal

WZ 312/21

191640 UTC Mar 21

​NORTH SEA, UK SECTOR.
Galleon Gas Field.
Platform 48/20-PN, 53-27.7N 001-55.0E, unlit.
WZ 310/21 190130 UTC Mar 21 NORTH SEA, UK SECTOR. DW Route Westwards, Corvette Gas Field. Platform 49/24, fog signal inoperative.

UK Coastal

WZ 310/21

190130 UTC Mar 21

​NORTH SEA, UK SECTOR.
DW Route Westwards, Corvette Gas Field.
Platform 49/24, 53-13.9N 002-37.3E, fog signal inoperative.
NAVAREA I 031/21 181540 UTC Mar 21 NOTIFICATION OF INITIAL OPERATIONAL CAPABILITY OF IRIDIUM SAFETYCAST SERVICES.

NAVAREA 1

NAVAREA I 031/21

181540 UTC Mar 21

NOTIFICATION OF INITIAL OPERATIONAL CAPABILITY OF IRIDIUM SAFETYCAST SERVICES. 
NAVAREA I AND METAREA I CO-ORDINATORS ARE COMMENCING INITIAL OPERATIONAL CAPABILITY (IOC) PHASE FOR IRIDIUM SAFETYCAST NAVIGATIONAL WARNINGS AND METEOROLOGICAL INFORMATION, EFFECTIVE 23 MARCH 2021. 
NAVAREA I AND METAREA I WILL PROMULGATE SAFETYCAST MESSAGES AS PART OF A NUMBERED SERIES DURING IOC IN ACCORDANCE WITH THE JOINT IMO/IHO/WMO MARITIME SAFETY INFORMATION MANUAL. 
MESSAGES MAY BE INTERMITTENT AND WILL ALSO BE SUPPLEMENTED BY TEST MESSAGES WHICH WILL BE CLEARLY DEFINED IN THE MESSAGE HEADER. 
MARINERS ARE ADVISED THAT IOC WILL BE IN PLACE FOR NAVAREA I AND METAREA I UNTIL FURTHER NOTICE. 
SEE UK ADMIRALTY NOTICES TO MARINERS SECTION VI FOR FURTHER INFORMATION. CONTACT INFORMATION FOR NAVAREA I IS; PHONE: +44 (0)1823 353448, FAX: +44 (0)1823 322352, EMAIL: NAVWARNINGS@UKHO.GOV.UK. 
WZ 308/21 181330 UTC Mar 21 IRISH SEA, EASTERN PART. Liverpool Bay Southwestwards. Exposed power cable.

UK Coastal

WZ 308/21

181330 UTC Mar 21

IRISH SEA, EASTERN PART.
1. Liverpool Bay South-westwards.
Exposed power cable in position 53-23.0N 003-35.5W.
Wide berth requested.
2. Cancel WZ 119.
Exposed power cable, sufficiently promulgated.

WZ 305/21 180330 UTC Mar 21 ENGLAND, BRISTOL CHANNEL. Bridgwater Bay. West and East Hinkley light buoys temporarily removed.

UK Coastal

WZ 305/21

180330 UTC Mar 21

​ENGLAND, BRISTOL CHANNEL.
Bridgwater Bay.
West Hinkley light buoy, 51-13.7N 003-10.8W, and East Hinkley light buoy, 51-13.5N 003-09.6W, temporarily removed.
WZ 303/21 171910 UTC Mar 21 NORTH SEA, UK SECTOR. Indefatigable Gas Field. Platform 49/18-BP, BD, fog signal inoperative.

UK Coastal

WZ 303/21

171910 UTC Mar 21

​NORTH SEA, UK SECTOR.
Indefatigable Gas Field.
Platform 49/18-BP, BD, 53-23.5N 002-31.5E, fog signal inoperative.
WZ 300/21 170940 UTC Mar 21 ENGLISH CHANNEL, EASTERN PART. Dover Strait TSS. ZC2 light buoy unlit.

UK Coastal

WZ 300/21

170940 UTC Mar 21

ENGLISH CHANNEL, EASTERN PART.
Dover Strait TSS.
1. ZC2 light buoy, 50-53.5N 001-30.8E, unlit.
2. Cancel WZ 104.
3. Cancel WZ 293.
WZ 292/21 142205 UTC Mar 21 NORTH SEA, UK SECTOR. Off Botney Ground TSS. Shamrock platform unlit and all navaids inoperative.

UK Coastal

WZ 292/21

142205 UTC Mar 21

NORTH SEA, UK SECTOR.
Off Botney Ground TSS.
Shamrock platform, 53-28.2N 002-55.2E, unlit and all navaids inoperative. 

WZ 287/21 120700 UTC Mar 21 NORTH SEA. Halibut Bank North-eastwards. Thistle Oil Field. Platform 211/18-A unlit and all navaids inoperative.

UK Coastal

WZ 287/21

120700 UTC Mar 21

NORTH SEA.
Halibut Bank North-eastwards.
Thistle Oil Field.
1. Platform 211/18-A, 61-21.8N 001-34.8E, unlit and all navaids inoperative.
2. Cancel WZ 098.
WZ 285/21 110325 UTC Mar 21 NORTH SEA, UK SECTOR. Barque Gas Field. Platform 48/13-PB lights unreliable.

UK Coastal

WZ 285/21

110325 UTC Mar 21

NORTH SEA, UK SECTOR.
Barque Gas Field.
1. Platform 48/13-PB, 53-36.8N 001-31.6E, lights unreliable.
2. Cancel WZ 097.
WZ 281/21 100720 UTC Mar 21 NORTH SEA, UK SECTOR. Indefatigable Gas Field. Platform 49/18-AP, AD, unlit and all navaids inoperative.

UK Coastal

WZ 281/21

100720 UTC Mar 21

NORTH SEA, UK SECTOR.
Indefatigable Gas Field.
Platform 49/18-AP, AD, 53-21.8N 002-34.1E, unlit and all navaids inoperative.
WZ 278/21 091700 UTC Mar 21 ENGLAND, EAST COAST. Thames Estuary. Kentish Flats Wind Farm. Turbines, fog signals inoperative.

UK Coastal

WZ 278/21

091700 UTC Mar 21

ENGLAND, EAST COAST.
Thames Estuary.
Kentish Flats Wind Farm.
1. Turbine, 51-26.5N 001-04.5E, fog signal inoperative.
2. Turbine KE01, 51-26.9N 001-08.2E, fog signal inoperative.
3. Cancel WZ 091.
NAVAREA I 015/21 021730 UTC Feb 21 ENGLAND, EAST COAST. Thames Estuary. Sunk Centre. Sunk Centre Light Vessel temporarily replaced by Safe Water pillar light-buoy.

NAVAREA 1

NAVAREA I 015/21

021730 UTC Feb 21

​ENGLAND, EAST COAST.
Thames Estuary.
Sunk Centre.
Sunk Centre Light Vessel, 51-50N 001-46E, temporarily replaced by Safe Water pillar light-buoy, Mo(A) 15s,  with radar beacon Racon (C) and AIS aid to navigation MMSI 992351034.
​

​​
Ref Date Time Group Description
NAVAREA I 048/21 190500 UTC Apr 21 RIGLIST. Correct at 190500 UTC Apr 21.

NAVAREA 1

NAVAREA I 048/21

190500 UTC Apr 21

​NAVAREA I 048/21
1. RIGLIST. Correct at 190500 UTC Apr 21.

                    Southern North Sea: 51N to 55N
                    53-05.8N 001-45.8E   Valaris 72 ACP Hewett Gas Field
                    53-14.0N 003-14.5E   590021
                    53-18.3N 001-23.1E   Noble Hans Deul
                    53-24.1N 002-39.4E   Seafox 4 ACP Brigantine Gas Field
                    53-32.4N 002-11.8E   Ensco 92
                    53-36.6N 000-43.4E   Haeva ACP Amethyst Gas Field
                    53-38.7N 000-36.2E   Erda ACP Amethyst Gas Field
                    53-43.0N 002-51.3E   Maersk Resolve ACP Grove Gas Field
                    53-46.1N 006-17.7E   Prospector 1
                    53-59.7N 006-25.2E   Seafox 2 ACP DolWin gamma platform
                    54-02.5N 000-26.5E   Valaris 123

                    North Sea: 55N to 60N, East of 5W 
         NEW   56-19.3N 003-21.1E   Maersk Invincible ACP Valhall Oil Field
                    56-43.5N 002-12.5E   Ensco 120 ACP Jasmine Gas Field
                    57-00.8N 001-50.5E   Maersk Highlander ACP Culzean Gas Field
                    57-01.3N 001-48.0E   Safe Caledonia
                    57-01.8N 001-57.1E   Safe Zephyrus ACP Shearwater Oil Field
                    57-01.9N 001-57.3E   Valaris 122 ACP Shearwater Oil Field
         NEW  57-06.7N 002-50.8E   Maersk Integrator ACP Tambar Oil Field
                    57-08.0N 001-08.7E   Prospector 5
                    57-09.2N 001-40.4E   Valaris Gorilla VI
                    57-21.0N 002-05.2E   Maersk Resilient
                    57-29.0N 002-03.1E   Ocean Endeavor
                    57-45.0N 001-04.8E   Ocean Patriot
                    57-48.9N 004-32.0E   Maersk Inspirer ACP YME platform
                    57-57.6N 000-55.1W   Noble Sam Hartley ACP Golden Eagle Oil and Gas Field
                    58-08.0N 001-55.8E   COSL Innovator
                    58-19.5N 000-41.9E   Paul B Loyd Junior
          NEW  58-48.8N 002-16.1E   West Bollsta
                    58-50.5N 002-14.9E   Rowan Viking alongside platform under construction, Norwegian Sector
                    58-50.7N 001-44.6E   Rowan Stavanger ACP Gudrun Oil and Gas Field
                    59-17.5N 002-22.5E   Scarabeo 8
                                        
                    Norwegian Sea: 60N to 65N, East of 5W
                    60-27.4N 002-41.6E   Askepott
                    60-30.4N 002-00.9E   Maersk Intrepid ACP Martin Linge platform
                    60-46.1N 003-36.6E   COSL Promoter
          NEW  60-48.5N 003-33.4E   Transocean Equinox
                    60-53.5N 003-40.2E   Transocean Endurance
                    61-16.6N 003-39.8E   West Mira
                    61-20.7N 002-04.3E   Deepsea Atlantic
                    61-24.0N 004-03.9E   Deepsea Yantai
                    61-29.7N 002-08.8E   Transocean Spitsbergen
                    61-36.1N 002-44.4E   West Hercules
                    64-53.2N 007-04.1E   Transocean Norge

                    South and West Coasts of the British Isles
          NEW  51-19.6N 008-05.9W  Stena Spey ACP Kinsale Head Gas Field  
                    53-48.5N 003-39.9W   Seajacks Leviathan ACP Calder Gas Field
                    53-48.9N 003-33.6W   JB-115 ACP DP3 South Morecambe Gas Field

NOTES:
A. Rigs are protected by a 500 metre safety zone.
B. Abbreviations: ACP - Adjacent to Charted Platform.
C. For Rigs located North of 65N, East of 5W, refer to Navarea XIX Warnings or visit www.navarea-xix.no

2. Cancel Navarea I 044/21.
NAVAREA I 047/21 161000 UTC Apr 21 NAVAREA I WARNINGS IN FORCE AT 161000 UTC APR 21

NAVAREA 1

NAVAREA I 047/21

161000 UTC Apr 21

NAVAREA I 047/21

1. NAVAREA I WARNINGS IN FORCE AT 161000 UTC APR 21:
2021 SERIES: 015, 031, 044, 045, 046, 047.

NOTES:
A. Texts of NAVAREA I Warnings issued each week are published in weekly editions of the ADMIRALTY Notices to Mariners bulletin (ANMB).
B. NAVAREA I Warnings less than 42 days old (031/21 onward) are promulgated via Enhanced Group Call (EGC) and/or relevant NAVTEX transmitters.
C. The complete texts of all in-force NAVAREA I warnings, including those which are no longer being broadcast, are reprinted in Section III of ANMB in weeks 1, 13, 26 and 39 and are also available from the UKHO website at: www.admiralty.co.uk/RNW.
Alternatively, these may be requested by e-mail from NAVAREA I Co-ordinator at: navwarnings@ukho.gov.uk

2. Cancel NAVAREA I 043/21.
NAVAREA I 046/21 141730 UTC Apr 21 NORTH SEA, UK SECTOR. Cromer Knoll Eastwards. Safety Zone established.

NAVAREA 1

NAVAREA I 046/21

141730 UTC Apr 21

​NORTH SEA, UK SECTOR.
Cromer Knoll Eastwards.
Chart GB 105.
Safety Zone, radius 500 metres, established centered on 53-18.3N 001-23.2E.
NAVAREA I 045/21 131300 UTC Apr 21 NORTH SEA, UK SECTOR. Seismic survey by S/V Ramform Hyperion.

NAVAREA 1

NAVAREA I 045/21

131300 UTC Apr 21

​NORTH SEA, UK SECTOR.
1. Seismic survey by S/V Ramform Hyperion towing 12 x 6000 metre cables in progress in an area bounded by 56-55.9N 000-30.1E, 56-55.9N 000-55.4E, 56-37.1N 000-55.6E, 56-37.1N 000-30.1E and 56-55.9N 000-30.1E.
2. A wide berth of 3NM from the bow and side, and 7NM from her stern is requested.
NAVAREA I 031/21 181540 UTC Mar 21 NOTIFICATION OF INITIAL OPERATIONAL CAPABILITY OF IRIDIUM SAFETYCAST SERVICES.

NAVAREA 1

NAVAREA I 031/21

181540 UTC Mar 21

NOTIFICATION OF INITIAL OPERATIONAL CAPABILITY OF IRIDIUM SAFETYCAST SERVICES. 
NAVAREA I AND METAREA I CO-ORDINATORS ARE COMMENCING INITIAL OPERATIONAL CAPABILITY (IOC) PHASE FOR IRIDIUM SAFETYCAST NAVIGATIONAL WARNINGS AND METEOROLOGICAL INFORMATION, EFFECTIVE 23 MARCH 2021. 
NAVAREA I AND METAREA I WILL PROMULGATE SAFETYCAST MESSAGES AS PART OF A NUMBERED SERIES DURING IOC IN ACCORDANCE WITH THE JOINT IMO/IHO/WMO MARITIME SAFETY INFORMATION MANUAL. 
MESSAGES MAY BE INTERMITTENT AND WILL ALSO BE SUPPLEMENTED BY TEST MESSAGES WHICH WILL BE CLEARLY DEFINED IN THE MESSAGE HEADER. 
MARINERS ARE ADVISED THAT IOC WILL BE IN PLACE FOR NAVAREA I AND METAREA I UNTIL FURTHER NOTICE. 
SEE UK ADMIRALTY NOTICES TO MARINERS SECTION VI FOR FURTHER INFORMATION. CONTACT INFORMATION FOR NAVAREA I IS; PHONE: +44 (0)1823 353448, FAX: +44 (0)1823 322352, EMAIL: NAVWARNINGS@UKHO.GOV.UK. 
NAVAREA I 015/21 021730 UTC Feb 21 ENGLAND, EAST COAST. Thames Estuary. Sunk Centre. Sunk Centre Light Vessel temporarily replaced by Safe Water pillar light-buoy.

NAVAREA 1

NAVAREA I 015/21

021730 UTC Feb 21

​ENGLAND, EAST COAST.
Thames Estuary.
Sunk Centre.
Sunk Centre Light Vessel, 51-50N 001-46E, temporarily replaced by Safe Water pillar light-buoy, Mo(A) 15s,  with radar beacon Racon (C) and AIS aid to navigation MMSI 992351034.
​

​

Ref Date Time Group Description
WZ 455/21 192030 UTC Apr 21 IRISH SEA. Isle of Man South-eastwards. Underwater cable operations in progress by C/S Ile d'Aix.

UK Coastal

WZ 455/21

192030 UTC Apr 21

IRISH SEA. 
Isle of Man South-eastwards.
1. Underwater cable operations in progress by C/S Ile d'Aix in vicinity of 53-45.0N 003-24.3W. 
Wide berth of one mile requested.
2. Cancel WZ 454.
WZ 453/21 191555 UTC Apr 21 SCOTLAND WEST COAST. Loch Creran. Depths less than charted.

UK Coastal

WZ 453/21

191555 UTC Apr 21

​SCOTLAND WEST COAST. Loch Creran.
Depths less than charted reported in vicinity 56-31.2N 004-21.6W, least depth 3m.
WZ 450/21 190000 UTC Apr 21 SCOTLAND, WEST COAST. Outer Hebrides, GPS jamming exercise in progress.

UK Coastal

WZ 450/21

190000 UTC Apr 21

SCOTLAND, WEST COAST.
Outer Hebrides. 
1. GPS jamming exercise in progress between 0700 UTC and 1700 UTC, 19 to 23 Apr, in the following areas:
A) within 25 miles of 57-19N  007-22W.
B) within 50 miles of 57-19N  007-22W in an arc from 230 degrees, clockwise to 345 degrees.
2. Alternative means of navigation should be used during jamming periods to confirm position. GPS equipment should be checked for correct operation either when clear of the affected area or on completion of the exercise.
3. Vessels are advised to avoid approaching within 1 mile of the RN Warship operating in the vicinity of the above position.
4. In an emergency jamming may be stopped on request via Range Operations on 01870 604441 or Jamming Control Authority on 01980 951573, or maritime distress frequencies using the phrase ‘emergency cease jam’.
5. Cancel this message 231800 UTC Apr 21.
WZ 445/21 171640 UTC Apr 21 WALES, NORTH COAST. Colwyn Bay Northwards. Temporary prohibited area and Emergency Wreck Marking Light-buoys established.

UK Coastal

WZ 445/21

171640 UTC Apr 21

​WALES, NORTH COAST.
Colwyn Bay Northwards.
1. Temporary prohibited area of radius 200 metres established, centred on the wreck of F/V Nicola Faith, located in 53-20.02N 003-41.88W.
2. Vessels are prohibited from interfering with, or anchoring, fishing or trawling in the vicinity of the wreck without permission from the Marine Accident Investigation Branch.
3. Failure to comply with this direction is a criminal offence.
4. Two Emergency Wreck Marking Light-buoys established north and south of wreck.
5. Cancel WZ 392.

WZ 442/21 170545 UTC Apr 21 GMDSS. Falmouth Coastguard. VHF R/T service from Trevose site, St.Ives site, unstable.

UK Coastal

WZ 442/21

170545 UTC Apr 21

GMDSS.
Falmouth Coastguard.
1. VHF R/T service from Trevose site, 50-32.9N 005-02.0W, unstable.
2. VHF R/T service from St.Ives site, 50-13.1N 005-28.6W, unstable.
3. VHF R/T and DSC services from Combe Martin site, normal conditions restored.
4. Cancel WZ 440.

WZ 428/21 142030 UTC Apr 21 WALES, WEST COAST. Cardigan Bay, Saint Tudwal's Islands. West Island light, ranges reduced to 9 and 5 miles.

UK Coastal

WZ 428/21

142030 UTC Apr 21

WALES, WEST COAST.
Cardigan Bay, Saint Tudwal's Islands.
West Island light, 52-47.9N 004-28.3W, ranges temporarily reduced to 9 and 5 miles.
WZ 423/21 141445 UTC Apr 21 SCOTLAND, WEST COAST. Isle of Skye, Loch Dunvegan. Uiginish Point Light, light unreliable.

UK Coastal

WZ 423/21

141445 UTC Apr 21

​SCOTLAND, WEST COAST.
Isle of Skye, Loch Dunvegan.
Uiginish Point Light, 57-26.8N 006-36.6W, light unreliable.
WZ 416/21 121525 UTC Apr 21 ENGLAND, EAST COAST. Southwold eastwards and Deep Water routes. . Survey operations in progress.

UK Coastal

WZ 416/21

121525 UTC Apr 21

ENGLAND, EAST COAST.  Southwold eastwards and Deep Water routes.
1. Survey operations in progress by S/V Fugro Frontier, Fugro Venturer and Fugro Searcher, towing survey equipment astern in an area bounded by 52-21.3N 001-44.4E, 52-30.4N 002-43.8E, 52-45.1N 002-44.4E, 52-46.3N 003-02.8E, 51-58.3N 002-16.2E and 52-08.4N 001-39.1E. Wide berth is requested.
2.  Cancel this message 120001Z July 21.
WZ 413/21 112330 UTC Apr 21 ENGLAND, SOUTH COAST. Lyme Bay. Intermittent GPS Jamming exercise.

UK Coastal

WZ 413/21

112330 UTC Apr 21

​ENGLAND, SOUTH COAST.
Lyme Bay.
1. Intermittent GPS Jamming exercise, 12 Apr to 07 May from 0800 UTC to 2000 UTC within area bounded by 50-30N 003-17W, 50-34N 003-05W, 50-34N 002-45W, 50-25N 002-15W, 50-02N 002-15W, 50-02N 002-58W and 50-25N 003-17W.
2. Alternative means of navigation should be used during jamming periods to confirm position. GPS equipment should be checked for correct operation either when clear of the affected area or on completion of the exercise.
3. In an emergency jamming may be stopped on request via FOST Duty Ops on 01752 557550 or by calling ‘FOST Ops’ on VHF Ch 74.
4. Cancel this message 072100 UTC May 21.
WZ 412/21 110825 UTC Apr 21 SOUTHERN NORTH SEA. Leman Gas Field. Platforms 49/27-H and 49/27-ED, unlit and all navaids inoperative.

UK Coastal

WZ 412/21

110825 UTC Apr 21

​SOUTHERN NORTH SEA. Leman Gas Field.
1. Platform 49/27-H, 53-00.3N 002-12.9E, unlit and all navaids inoperative.
2. Platform 49/27-ED, 53-03.6N 002-12.6E, unlit and all navaids inoperative.
3. Cancel WZ 274.
WZ 411/21 110745 UTC Apr 21 IRISH SEA, EASTERN PART. Millom Gas Field. Platform 113/26, all navaids inoperative.

UK Coastal

WZ 411/21

110745 UTC Apr 21

​IRISH SEA, EASTERN PART.
Millom Gas Field.
Platform 113/26, 54-01.6N 003-51.7W, all navaids inoperative.
2. Cancel WZ 391.
WZ 396/21 071645 UTC Apr 21 ENGLAND, East Coast. Hewett Gas Field. Gas pipeline unsecure. Vessels advised to keep clear.

UK Coastal

WZ 396/21

071645 UTC Apr 21

ENGLAND, East Coast.
Hewett Gas Field.
1. Gas pipeline unsecure on seabed at 53-01.2N 001-44.9E with risk of rupturing.
2. Vessels are advised to keep clear of the area.
3. Cancel WZ 221.

 
WZ 388/21 060815 UTC Apr 21 ENGLAND, EAST COAST. Haisborough Sand Northwards. Hewett Gas Field. Platform 48/29-B, unlit and all navaids inoperative.

UK Coastal

WZ 388/21

060815 UTC Apr 21

​ENGLAND, EAST COAST.
Haisborough Sand Northwards.
Hewett Gas Field.
Platform 48/29-B, 53-03.3N 001-41.1E, unlit and all navaids inoperative.
WZ 371/21 021800 UTC Apr 21 BRITISH ISLES, NORTHERN PART. DGPS service from Stirling, reduced power.

UK Coastal

WZ 371/21

021800 UTC Apr 21

​BRITISH ISLES, NORTHERN PART.
1. DGPS service from Stirling, 56-04.3N 004-03.6W, reduced power.
2. Cancel WZ 367.
WZ 366/21 011925 UTC Apr 21 SCOTLAND, EAST COAST. Aberdeen North-eastwards. Aberdeen Offshore Wind Farm. Turbine, foghorn inoperative.

UK Coastal

WZ 366/21

011925 UTC Apr 21

​SCOTLAND, EAST COAST.
Aberdeen North-eastwards.
Aberdeen Offshore Wind Farm.
Turbine in 57-13.0N 001-59.1W, foghorn inoperative.
WZ 354/21 282105 UTC Mar 21 SCOTLAND, WEST COAST. Loch Linnhe. Rubha Cuil-cheanna. Two new lights established.

UK Coastal

WZ 354/21

282105 UTC Mar 21

​SCOTLAND, WEST COAST.
Loch Linnhe.
Rubha Cuil-cheanna.
1. Two new lights established in 56-42.31N 005-14.80W:
A. Directional White/Red/Green 2 seconds, 12 metres, 5 miles night and 1.7 miles day with sectors in degrees as follows: Isophase Red 190.5 -192.5, Alternating White/Red 192.5 -193.5, Isophase White 193.5-194.5, Alternating Green/White 194.5 -195.5 and Isophase Green 195.5 -197.5.
B. Flash two, Green, 8 seconds, 12 metres, 5 miles.
2. Cancel WZ 352.
WZ 339/21 251145 UTC Mar 21 IRELAND, EAST COAST. Southern Approaches to Dublin Bay. Survey operations in progress.

UK Coastal

WZ 339/21

251145 UTC Mar 21

IRELAND, EAST COAST. 
Southern Approaches to Dublin Bay.
1. Survey operations in progress by Fugro Mercator, Fugro Seeker and Spectrum 1 within the sea area westwards of a line joining 53-19.3N 005-53.6W, 53-14.1N 005-51.6W and 53-08.9N 005-51.7W. 
Irish Department of Transport Marine Notice No. 6 of 2021 refers.
2. Cancel WZ 162.
WZ 337/21 241115 UTC Mar 21 NORTH SEA, UK SECTOR. Wenlock Gas Field. Platform 49/12A, unlit and all navaids inoperative

UK Coastal

WZ 337/21

241115 UTC Mar 21

NORTH SEA, UK SECTOR.
Wenlock Gas Field.
Platform 49/12A, 55-35.3N 002-17.6E, unlit and all navaids inoperative.

WZ 336/21 240950 UTC Mar 21 ENGLISH CHANNEL, EASTERN PART. Dover Strait TSS. Ridens SE light-buoy, AIS off-air.

UK Coastal

WZ 336/21

240950 UTC Mar 21

​ENGLISH CHANNEL, EASTERN PART.
Dover Strait TSS.
Ridens SE light-buoy, 50-43.4N 001-19.0E, AIS off-air.
WZ 312/21 191640 UTC Mar 21 NORTH SEA, UK SECTOR. Galleon Gas Field. Platform 48/20-PN unlit.

UK Coastal

WZ 312/21

191640 UTC Mar 21

​NORTH SEA, UK SECTOR.
Galleon Gas Field.
Platform 48/20-PN, 53-27.7N 001-55.0E, unlit.
WZ 310/21 190130 UTC Mar 21 NORTH SEA, UK SECTOR. DW Route Westwards, Corvette Gas Field. Platform 49/24, fog signal inoperative.

UK Coastal

WZ 310/21

190130 UTC Mar 21

​NORTH SEA, UK SECTOR.
DW Route Westwards, Corvette Gas Field.
Platform 49/24, 53-13.9N 002-37.3E, fog signal inoperative.
WZ 308/21 181330 UTC Mar 21 IRISH SEA, EASTERN PART. Liverpool Bay Southwestwards. Exposed power cable.

UK Coastal

WZ 308/21

181330 UTC Mar 21

IRISH SEA, EASTERN PART.
1. Liverpool Bay South-westwards.
Exposed power cable in position 53-23.0N 003-35.5W.
Wide berth requested.
2. Cancel WZ 119.
Exposed power cable, sufficiently promulgated.

WZ 305/21 180330 UTC Mar 21 ENGLAND, BRISTOL CHANNEL. Bridgwater Bay. West and East Hinkley light buoys temporarily removed.

UK Coastal

WZ 305/21

180330 UTC Mar 21

​ENGLAND, BRISTOL CHANNEL.
Bridgwater Bay.
West Hinkley light buoy, 51-13.7N 003-10.8W, and East Hinkley light buoy, 51-13.5N 003-09.6W, temporarily removed.
WZ 303/21 171910 UTC Mar 21 NORTH SEA, UK SECTOR. Indefatigable Gas Field. Platform 49/18-BP, BD, fog signal inoperative.

UK Coastal

WZ 303/21

171910 UTC Mar 21

​NORTH SEA, UK SECTOR.
Indefatigable Gas Field.
Platform 49/18-BP, BD, 53-23.5N 002-31.5E, fog signal inoperative.
WZ 300/21 170940 UTC Mar 21 ENGLISH CHANNEL, EASTERN PART. Dover Strait TSS. ZC2 light buoy unlit.

UK Coastal

WZ 300/21

170940 UTC Mar 21

ENGLISH CHANNEL, EASTERN PART.
Dover Strait TSS.
1. ZC2 light buoy, 50-53.5N 001-30.8E, unlit.
2. Cancel WZ 104.
3. Cancel WZ 293.
WZ 292/21 142205 UTC Mar 21 NORTH SEA, UK SECTOR. Off Botney Ground TSS. Shamrock platform unlit and all navaids inoperative.

UK Coastal

WZ 292/21

142205 UTC Mar 21

NORTH SEA, UK SECTOR.
Off Botney Ground TSS.
Shamrock platform, 53-28.2N 002-55.2E, unlit and all navaids inoperative. 

WZ 287/21 120700 UTC Mar 21 NORTH SEA. Halibut Bank North-eastwards. Thistle Oil Field. Platform 211/18-A unlit and all navaids inoperative.

UK Coastal

WZ 287/21

120700 UTC Mar 21

NORTH SEA.
Halibut Bank North-eastwards.
Thistle Oil Field.
1. Platform 211/18-A, 61-21.8N 001-34.8E, unlit and all navaids inoperative.
2. Cancel WZ 098.
WZ 285/21 110325 UTC Mar 21 NORTH SEA, UK SECTOR. Barque Gas Field. Platform 48/13-PB lights unreliable.

UK Coastal

WZ 285/21

110325 UTC Mar 21

NORTH SEA, UK SECTOR.
Barque Gas Field.
1. Platform 48/13-PB, 53-36.8N 001-31.6E, lights unreliable.
2. Cancel WZ 097.
WZ 281/21 100720 UTC Mar 21 NORTH SEA, UK SECTOR. Indefatigable Gas Field. Platform 49/18-AP, AD, unlit and all navaids inoperative.

UK Coastal

WZ 281/21

100720 UTC Mar 21

NORTH SEA, UK SECTOR.
Indefatigable Gas Field.
Platform 49/18-AP, AD, 53-21.8N 002-34.1E, unlit and all navaids inoperative.
WZ 278/21 091700 UTC Mar 21 ENGLAND, EAST COAST. Thames Estuary. Kentish Flats Wind Farm. Turbines, fog signals inoperative.

UK Coastal

WZ 278/21

091700 UTC Mar 21

ENGLAND, EAST COAST.
Thames Estuary.
Kentish Flats Wind Farm.
1. Turbine, 51-26.5N 001-04.5E, fog signal inoperative.
2. Turbine KE01, 51-26.9N 001-08.2E, fog signal inoperative.
3. Cancel WZ 091.
​

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.

The IHO WWNWS-SC web page allows direct access to all the NAVAREA Co-ordinators around the world who have made their NAVAREA warnings available on the web. You can visit the IHO WWNWS-SC web page here.

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