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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.

Information

The following NAVAREA 1 and UK Coastal Warnings (WZs) were in force at: 111039 UTC May 21

​​​​​​​​​​

Ref Date Time Group Description
NAVAREA I 060/21 100500 UTC May 21 RIGLIST. Correct at 100500 UTC May 21.

NAVAREA 1

NAVAREA I 060/21

100500 UTC May 21

1. RIGLIST. Correct at 100500 UTC May 21.

         Southern North Sea: 51N to 55N
NEW Vlissingen                     JB-115
NEW 52-33.1N 003-44.5E   Maersk Resolute ACP Horizon P9-6
         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
         53-21.1N 002-17.7E   Ensco 92
         53-24.1N 002-39.4E   Seafox 4 ACP Brigantine Gas Field
         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 
         55-28.5N 005-06.3E   Noble Sam Turner ACP Dan Oil Field
         56-19.5N 003-21.2E   Maersk Invincible ACP Valhall Oil Field
         56-43.5N 002-12.5E   Ensco 120 ACP Jasmine Gas Field
         56-56.0N 006-50.3E   Borgland Dolphin
         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
         57-06.7N 002-50.8E   Maersk Integrator ACP Ula 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
NEW Nigg                                     Noble Sam Hartley
         57-45.0N 001-04.8E   Ocean Patriot
         57-48.9N 004-32.0E   Maersk Inspirer ACP YME platform
         58-08.0N 001-55.8E   COSL Innovator
         58-19.5N 000-41.9E   Paul B Loyd Junior
         58-48.9N 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
         60-48.5N 003-33.4E   Transocean Equinox
         60-53.5N 003-40.2E   Transocean Endurance
         61-00.4N 003-24.9E   Deepsea Atlantic
         61-16.6N 003-39.8E   West Mira
         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
         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

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 055/21.

WZ 525/21 100000 UTC May 21 BRITISH ISLES, NORTHERN PART. DGPS service from Stirling.

UK Coastal

WZ 525/21

100000 UTC May 21

BRITISH ISLES, NORTHERN PART. 
1. DGPS service from Stirling, 56-04.3N 004-03.6W, off air between 101000 UTC and 141400 UTC May.
2. Cancel this message 141500 UTC May 21.


WZ 524/21 092115 UTC May 21 SCOTLAND, WEST COAST. North Minch. Intermittent GPS Jamming Exercise in progress.

UK Coastal

WZ 524/21

092115 UTC May 21

SCOTLAND, WEST COAST. 
North Minch.
1.  Intermittent GPS Jamming and Spoofing Exercises in progress daily from 09 to 20 May between 0700 UTC and 1900 UTC, within 30 miles of 57-51N 005-48W.
2.  Alternative means of navigation should be used during jamming periods to confirm position. GPS equipment should not be relied upon within the exercise area and 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 the Exercise Strike Warrior Battle Watch Captain at HMNB Clyde on +44 1436 674321 option 1 ext 3401.
4.  Jamming will not take place in restricted visibility. 
5.  Cancel WZ 520 nd WZ 521.
6. Cancel this message 202000 UTC May 21.

WZ 519/21 081115 UTC May 21 SOUTHERN NORTH SEA. Leman Bank. Platform 49/27J, unlit and all navaids inoperative.

UK Coastal

WZ 519/21

081115 UTC May 21

SOUTHERN NORTH SEA.
Leman Bank.
Platform 49/27J, 53-02.0N 002-13.2E, unlit and all navaids inoperative.

NAVAREA I 059/21 072340 UTC May 21 NORTH SEA. Rotterdam to Aberdeen via DW Route. Tug Manta towing floating turbine.

NAVAREA 1

NAVAREA I 059/21

072340 UTC May 21

NORTH SEA.
Rotterdam to Aberdeen via DW Route.
Chart GB 4140 (INT 140).
Tug Manta towing floating turbine KIN-02 in vicinity of line joining 52-00.0N 004-00.4E, 52-01.7N 003-54.1E, 51-58.3N 003-12.8E, 51-59.1N 003-00.1E, 52-00.3N 002-40.4E, 53-05.9N 002-42.4E, 53-54.2N 003-26.6E, 53-57.0N 003-52.3E, 55-28.0N 003-14.1E and 57-17.6N 001-24.8W.
Length of tow 1000 metres.
Wide berth requested.  

NAVAREA I 058/21 071000 UTC May 21 NAVAREA I WARNINGS IN FORCE AT 071000 UTC APR 21

NAVAREA 1

NAVAREA I 058/21

071000 UTC May 21

1. NAVAREA I WARNINGS IN FORCE AT 071000 UTC APR 21:

2021 SERIES: 015, 031, 045, 046, 054, 055, 057, 058.

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 (045/21 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 056/21.

WZ 507/21 050950 UTC May 21 ENGLISH CHANNEL, EASTERN PART. Dover Strait TSS. Ridens SE light-buoy, AIS off-air.

UK Coastal

WZ 507/21

050950 UTC May 21

​ENGLISH CHANNEL, EASTERN PART.
Dover Strait TSS.
1.  Ridens SE light-buoy, 50-43.4N 001-19.0E, AIS off-air.
2.  Cancel WZ 336.

NAVAREA I 057/21 010055 UTC May 21 NORTH SEA. Bergen Ground. Seismic by M/V Ramform Vanguard.

NAVAREA 1

NAVAREA I 057/21

010055 UTC May 21

NORTH SEA.
Bergen Ground.
Chart GB 292.
1. Seismic survey in progress by M/V Ramform Vanguard, towing 12 x 6500 metre long cables within area bounded by 59-25.3N 001-40.0E, 59-42.0N 001-51.0E, 59-44.9N 002-05.7E, 59-41.9N 002-23.2E and 59-19.2N 002-07.3E.
Wide berth of 3 miles ahead and abeam and 5 miles astern requested. Guard vessel Sanco Chaser in attendance.
2. Cancel NAVAREA I 050/21.

WZ 498/21 301230 UTC Apr 21 NORTH SEA, UK SECTOR. Galleon Gas Field. Platform 48/20-PN unlit.

UK Coastal

WZ 498/21

301230 UTC Apr 21

NORTH SEA, UK SECTOR.
Galleon Gas Field.
1. Platform 48/20-PN, 53-27.7N 001-55.0E, unlit.
2. Cancel WZ 312.

WZ 497/21 301225 UTC Apr 21 NORTH SEA, UK SECTOR. DW Route Westwards, Corvette Gas Field. Platform 49/24, fog signal inoperative.

UK Coastal

WZ 497/21

301225 UTC Apr 21

NORTH SEA, UK SECTOR.
DW Route Westwards, Corvette Gas Field.
1. Platform 49/24, 53-13.9N 002-37.3E, fog signal inoperative.
2. Cancel WZ 310.

WZ 496/21 301135 UTC Apr 21 ENGLAND, EAST COAST. Lowestoft South-eastwards. Wreck reported.

UK Coastal

WZ 496/21

301135 UTC Apr 21

​ENGLAND, EAST COAST.
Lowestoft South-eastwards.
Wreck reported at 52-22.2N 002-02.9E, least depth 10.3 metres.

WZ 493/21 291705 UTC Apr 21 SCOTLAND, WEST COAST. Firth of Clyde. Patterson's Rock buoy, AIS unreliable.

UK Coastal

WZ 493/21

291705 UTC Apr 21

​SCOTLAND, WEST COAST.
Firth of Clyde.
Patterson's Rock buoy, 55-16.9N 005-32.5W, AIS unreliable.

WZ 488/21 291015 UTC Apr 21 ENGLAND, EAST COAST. Approaches to The Wash. Race Bank Wind Farm. Turbine D01, fog signal inoperative.

UK Coastal

WZ 488/21

291015 UTC Apr 21

​ENGLAND, EAST COAST.
Approaches to The Wash.
Race Bank Wind Farm.
Turbine in 53-20.1N 000-49.1E, fog signal inoperative.

WZ 487/21 290135 UTC Apr 21 ENGLAND, BRISTOL CHANNEL. Bridgwater Bay. West and East Hinkley light buoys temporarily removed.

UK Coastal

WZ 487/21

290135 UTC Apr 21

ENGLAND, BRISTOL CHANNEL.
Bridgwater Bay.
1. West Hinkley light buoy, 51-13.7N 003-10.8W, and East Hinkley light buoy, 51-13.5N 003-09.6W, temporarily removed.
2. Cancel WZ 305.



WZ 484/21 280815 UTC Apr 21 ENGLISH CHANNEL, EASTERN PART. Dover Strait TSS. ZC2 light buoy unlit.

UK Coastal

WZ 484/21

280815 UTC Apr 21

ENGLISH CHANNEL, EASTERN PART.
Dover Strait TSS.
1. ZC2 light buoy, 50-53.5N 001-30.8E, unlit.
2. Cancel WZ 300.

NAVAREA I 054/21 270155 UTC Apr 21 NORTH SEA, UK AND NORWEGIAN SECTORS. Shetland Islands North-eastwards. Seismic survey in progress by M/V SW Amundsen.

NAVAREA 1

NAVAREA I 054/21

270155 UTC Apr 21

NORTH SEA, UK AND NORWEGIAN SECTORS.
Shetland Islands North-eastwards.
Chart GB 2182D (INT 1040).
1. Seismic survey in progress by M/V SW Amundsen towing 12 x 8000 metre cables within area bounded by 62-02.1N 000-11.1E, 62-03.2N 001-20.1E, 61-54.9N 001-25.9E, 61-55.0N 004-11.5E, 60-39.1N 004-08.6E, 60-37.7N 000-36.6E, 61-34.0N 000-32.5E and 61-33.6N 000-13.7E.
Wide berth requested.
M/V Sanco Scorpio and M/V Tess in attendance.
2. Cancel NAV I 052.

WZ 479/21 261210 UTC Apr 21 ENGLAND, EAST COAST. Great Yarmouth North-eastwards. Middle Cross Sand.

UK Coastal

WZ 479/21

261210 UTC Apr 21

ENGLAND, EAST COAST.
Great Yarmouth North-eastwards.
Middle Cross Sand.
1. Barley light-buoy moved Northwards 0.3 miles to 52-38.76N 001-52.90E.
2. E Cross Sand light-buoy moved Northwards 0.3 miles to 52-40.33N 001-53.70E.

WZ 478/21 251635 UTC Apr 21 NORTH SEA, UK SECTOR. Off Botney Ground TSS. Shamrock platform unlit and all navaids inoperative.

UK Coastal

WZ 478/21

251635 UTC Apr 21

NORTH SEA, UK SECTOR.
Off Botney Ground TSS.
1. Shamrock platform, 53-28.2N 002-55.2E, unlit and all navaids inoperative. 
2. Cancel WZ 292.

WZ 477/21 251220 UTC Apr 21 SCOTLAND, WEST COAST. Isle of Gigha Eastwards. Bhanarach Rocks. East cardinal light-buoy permanently established.

UK Coastal

WZ 477/21

251220 UTC Apr 21

​SCOTLAND, WEST COAST.
Isle of Gigha Eastwards.
Bhanarach Rocks.
East cardinal light-buoy, 55-40.7N 005-43.3W, permanently established.

WZ 469/21 221635 UTC Apr 21 NORTH SEA, UK SECTOR. Barque Gas Field. Platform 48/13-PB lights unreliable.

UK Coastal

WZ 469/21

221635 UTC Apr 21

NORTH SEA, UK SECTOR.
Barque Gas Field.
1. Platform 48/13-PB, 53-36.8N 001-31.6E, lights unreliable.
2. Cancel WZ 285.

WZ 464/21 211620 UTC Apr 21 SOUTHERN NORTH SEA. Leman Gas Field.

UK Coastal

WZ 464/21

211620 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. Cancel WZ 412.


WZ 461/21 210515 UTC Apr 21 NORTH SEA, UK SECTOR. Indefatigable Gas Field. Platform 49/18-AP, AD, unlit and all navaids inoperative.

UK Coastal

WZ 461/21

210515 UTC Apr 21

​NORTH SEA, UK SECTOR. Indefatigable Gas Field.
1. Platform 49/18-AP, AD, 53-21.8N 002-34.1E, unlit and all navaids inoperative.
2. Cancel WZ 281.

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 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 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.

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 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 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.

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
NAVAREA I 060/21 100500 UTC May 21 RIGLIST. Correct at 100500 UTC May 21.

NAVAREA 1

NAVAREA I 060/21

100500 UTC May 21

1. RIGLIST. Correct at 100500 UTC May 21.

         Southern North Sea: 51N to 55N
NEW Vlissingen                     JB-115
NEW 52-33.1N 003-44.5E   Maersk Resolute ACP Horizon P9-6
         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
         53-21.1N 002-17.7E   Ensco 92
         53-24.1N 002-39.4E   Seafox 4 ACP Brigantine Gas Field
         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 
         55-28.5N 005-06.3E   Noble Sam Turner ACP Dan Oil Field
         56-19.5N 003-21.2E   Maersk Invincible ACP Valhall Oil Field
         56-43.5N 002-12.5E   Ensco 120 ACP Jasmine Gas Field
         56-56.0N 006-50.3E   Borgland Dolphin
         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
         57-06.7N 002-50.8E   Maersk Integrator ACP Ula 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
NEW Nigg                                     Noble Sam Hartley
         57-45.0N 001-04.8E   Ocean Patriot
         57-48.9N 004-32.0E   Maersk Inspirer ACP YME platform
         58-08.0N 001-55.8E   COSL Innovator
         58-19.5N 000-41.9E   Paul B Loyd Junior
         58-48.9N 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
         60-48.5N 003-33.4E   Transocean Equinox
         60-53.5N 003-40.2E   Transocean Endurance
         61-00.4N 003-24.9E   Deepsea Atlantic
         61-16.6N 003-39.8E   West Mira
         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
         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

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 055/21.

NAVAREA I 059/21 072340 UTC May 21 NORTH SEA. Rotterdam to Aberdeen via DW Route. Tug Manta towing floating turbine.

NAVAREA 1

NAVAREA I 059/21

072340 UTC May 21

NORTH SEA.
Rotterdam to Aberdeen via DW Route.
Chart GB 4140 (INT 140).
Tug Manta towing floating turbine KIN-02 in vicinity of line joining 52-00.0N 004-00.4E, 52-01.7N 003-54.1E, 51-58.3N 003-12.8E, 51-59.1N 003-00.1E, 52-00.3N 002-40.4E, 53-05.9N 002-42.4E, 53-54.2N 003-26.6E, 53-57.0N 003-52.3E, 55-28.0N 003-14.1E and 57-17.6N 001-24.8W.
Length of tow 1000 metres.
Wide berth requested.  

NAVAREA I 058/21 071000 UTC May 21 NAVAREA I WARNINGS IN FORCE AT 071000 UTC APR 21

NAVAREA 1

NAVAREA I 058/21

071000 UTC May 21

1. NAVAREA I WARNINGS IN FORCE AT 071000 UTC APR 21:

2021 SERIES: 015, 031, 045, 046, 054, 055, 057, 058.

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 (045/21 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 056/21.

NAVAREA I 057/21 010055 UTC May 21 NORTH SEA. Bergen Ground. Seismic by M/V Ramform Vanguard.

NAVAREA 1

NAVAREA I 057/21

010055 UTC May 21

NORTH SEA.
Bergen Ground.
Chart GB 292.
1. Seismic survey in progress by M/V Ramform Vanguard, towing 12 x 6500 metre long cables within area bounded by 59-25.3N 001-40.0E, 59-42.0N 001-51.0E, 59-44.9N 002-05.7E, 59-41.9N 002-23.2E and 59-19.2N 002-07.3E.
Wide berth of 3 miles ahead and abeam and 5 miles astern requested. Guard vessel Sanco Chaser in attendance.
2. Cancel NAVAREA I 050/21.

NAVAREA I 054/21 270155 UTC Apr 21 NORTH SEA, UK AND NORWEGIAN SECTORS. Shetland Islands North-eastwards. Seismic survey in progress by M/V SW Amundsen.

NAVAREA 1

NAVAREA I 054/21

270155 UTC Apr 21

NORTH SEA, UK AND NORWEGIAN SECTORS.
Shetland Islands North-eastwards.
Chart GB 2182D (INT 1040).
1. Seismic survey in progress by M/V SW Amundsen towing 12 x 8000 metre cables within area bounded by 62-02.1N 000-11.1E, 62-03.2N 001-20.1E, 61-54.9N 001-25.9E, 61-55.0N 004-11.5E, 60-39.1N 004-08.6E, 60-37.7N 000-36.6E, 61-34.0N 000-32.5E and 61-33.6N 000-13.7E.
Wide berth requested.
M/V Sanco Scorpio and M/V Tess in attendance.
2. Cancel NAV I 052.

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 525/21 100000 UTC May 21 BRITISH ISLES, NORTHERN PART. DGPS service from Stirling.

UK Coastal

WZ 525/21

100000 UTC May 21

BRITISH ISLES, NORTHERN PART. 
1. DGPS service from Stirling, 56-04.3N 004-03.6W, off air between 101000 UTC and 141400 UTC May.
2. Cancel this message 141500 UTC May 21.


WZ 524/21 092115 UTC May 21 SCOTLAND, WEST COAST. North Minch. Intermittent GPS Jamming Exercise in progress.

UK Coastal

WZ 524/21

092115 UTC May 21

SCOTLAND, WEST COAST. 
North Minch.
1.  Intermittent GPS Jamming and Spoofing Exercises in progress daily from 09 to 20 May between 0700 UTC and 1900 UTC, within 30 miles of 57-51N 005-48W.
2.  Alternative means of navigation should be used during jamming periods to confirm position. GPS equipment should not be relied upon within the exercise area and 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 the Exercise Strike Warrior Battle Watch Captain at HMNB Clyde on +44 1436 674321 option 1 ext 3401.
4.  Jamming will not take place in restricted visibility. 
5.  Cancel WZ 520 nd WZ 521.
6. Cancel this message 202000 UTC May 21.

WZ 519/21 081115 UTC May 21 SOUTHERN NORTH SEA. Leman Bank. Platform 49/27J, unlit and all navaids inoperative.

UK Coastal

WZ 519/21

081115 UTC May 21

SOUTHERN NORTH SEA.
Leman Bank.
Platform 49/27J, 53-02.0N 002-13.2E, unlit and all navaids inoperative.

WZ 507/21 050950 UTC May 21 ENGLISH CHANNEL, EASTERN PART. Dover Strait TSS. Ridens SE light-buoy, AIS off-air.

UK Coastal

WZ 507/21

050950 UTC May 21

​ENGLISH CHANNEL, EASTERN PART.
Dover Strait TSS.
1.  Ridens SE light-buoy, 50-43.4N 001-19.0E, AIS off-air.
2.  Cancel WZ 336.

WZ 498/21 301230 UTC Apr 21 NORTH SEA, UK SECTOR. Galleon Gas Field. Platform 48/20-PN unlit.

UK Coastal

WZ 498/21

301230 UTC Apr 21

NORTH SEA, UK SECTOR.
Galleon Gas Field.
1. Platform 48/20-PN, 53-27.7N 001-55.0E, unlit.
2. Cancel WZ 312.

WZ 497/21 301225 UTC Apr 21 NORTH SEA, UK SECTOR. DW Route Westwards, Corvette Gas Field. Platform 49/24, fog signal inoperative.

UK Coastal

WZ 497/21

301225 UTC Apr 21

NORTH SEA, UK SECTOR.
DW Route Westwards, Corvette Gas Field.
1. Platform 49/24, 53-13.9N 002-37.3E, fog signal inoperative.
2. Cancel WZ 310.

WZ 496/21 301135 UTC Apr 21 ENGLAND, EAST COAST. Lowestoft South-eastwards. Wreck reported.

UK Coastal

WZ 496/21

301135 UTC Apr 21

​ENGLAND, EAST COAST.
Lowestoft South-eastwards.
Wreck reported at 52-22.2N 002-02.9E, least depth 10.3 metres.

WZ 493/21 291705 UTC Apr 21 SCOTLAND, WEST COAST. Firth of Clyde. Patterson's Rock buoy, AIS unreliable.

UK Coastal

WZ 493/21

291705 UTC Apr 21

​SCOTLAND, WEST COAST.
Firth of Clyde.
Patterson's Rock buoy, 55-16.9N 005-32.5W, AIS unreliable.

WZ 488/21 291015 UTC Apr 21 ENGLAND, EAST COAST. Approaches to The Wash. Race Bank Wind Farm. Turbine D01, fog signal inoperative.

UK Coastal

WZ 488/21

291015 UTC Apr 21

​ENGLAND, EAST COAST.
Approaches to The Wash.
Race Bank Wind Farm.
Turbine in 53-20.1N 000-49.1E, fog signal inoperative.

WZ 487/21 290135 UTC Apr 21 ENGLAND, BRISTOL CHANNEL. Bridgwater Bay. West and East Hinkley light buoys temporarily removed.

UK Coastal

WZ 487/21

290135 UTC Apr 21

ENGLAND, BRISTOL CHANNEL.
Bridgwater Bay.
1. West Hinkley light buoy, 51-13.7N 003-10.8W, and East Hinkley light buoy, 51-13.5N 003-09.6W, temporarily removed.
2. Cancel WZ 305.



WZ 484/21 280815 UTC Apr 21 ENGLISH CHANNEL, EASTERN PART. Dover Strait TSS. ZC2 light buoy unlit.

UK Coastal

WZ 484/21

280815 UTC Apr 21

ENGLISH CHANNEL, EASTERN PART.
Dover Strait TSS.
1. ZC2 light buoy, 50-53.5N 001-30.8E, unlit.
2. Cancel WZ 300.

WZ 479/21 261210 UTC Apr 21 ENGLAND, EAST COAST. Great Yarmouth North-eastwards. Middle Cross Sand.

UK Coastal

WZ 479/21

261210 UTC Apr 21

ENGLAND, EAST COAST.
Great Yarmouth North-eastwards.
Middle Cross Sand.
1. Barley light-buoy moved Northwards 0.3 miles to 52-38.76N 001-52.90E.
2. E Cross Sand light-buoy moved Northwards 0.3 miles to 52-40.33N 001-53.70E.

WZ 478/21 251635 UTC Apr 21 NORTH SEA, UK SECTOR. Off Botney Ground TSS. Shamrock platform unlit and all navaids inoperative.

UK Coastal

WZ 478/21

251635 UTC Apr 21

NORTH SEA, UK SECTOR.
Off Botney Ground TSS.
1. Shamrock platform, 53-28.2N 002-55.2E, unlit and all navaids inoperative. 
2. Cancel WZ 292.

WZ 477/21 251220 UTC Apr 21 SCOTLAND, WEST COAST. Isle of Gigha Eastwards. Bhanarach Rocks. East cardinal light-buoy permanently established.

UK Coastal

WZ 477/21

251220 UTC Apr 21

​SCOTLAND, WEST COAST.
Isle of Gigha Eastwards.
Bhanarach Rocks.
East cardinal light-buoy, 55-40.7N 005-43.3W, permanently established.

WZ 469/21 221635 UTC Apr 21 NORTH SEA, UK SECTOR. Barque Gas Field. Platform 48/13-PB lights unreliable.

UK Coastal

WZ 469/21

221635 UTC Apr 21

NORTH SEA, UK SECTOR.
Barque Gas Field.
1. Platform 48/13-PB, 53-36.8N 001-31.6E, lights unreliable.
2. Cancel WZ 285.

WZ 464/21 211620 UTC Apr 21 SOUTHERN NORTH SEA. Leman Gas Field.

UK Coastal

WZ 464/21

211620 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. Cancel WZ 412.


WZ 461/21 210515 UTC Apr 21 NORTH SEA, UK SECTOR. Indefatigable Gas Field. Platform 49/18-AP, AD, unlit and all navaids inoperative.

UK Coastal

WZ 461/21

210515 UTC Apr 21

​NORTH SEA, UK SECTOR. Indefatigable Gas Field.
1. Platform 49/18-AP, AD, 53-21.8N 002-34.1E, unlit and all navaids inoperative.
2. Cancel WZ 281.

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 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 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 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 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 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.

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.