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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: 191207 UTC September 20

​​​​​​​​​​

Ref Date Time Group Description
WZ 995/20 191205 UTC Sep 20 ENGLAND SOUTH COAST. Portland Bill westward. 9 metre Log reported adrift

UK Coastal

WZ 995/20

191205 UTC Sep 20

ENGLAND SOUTH COAST.
Portland Bill westward.
1.  Log, 9 metres in length, reported adrift in vicinity 50-30.9N 002-28.2W at 191136 UTC Sep.
2.  Cancel this message 201136 UTC Sep 20.

WZ 993/20 191010 UTC Sep 20 ENGLISH CHANNEL, EASTERN PART. Brighton to Dieppe. Survey operations in progress by M/V EGS Pioneer.

UK Coastal

WZ 993/20

191010 UTC Sep 20

ENGLISH CHANNEL, EASTERN PART.
Brighton to Dieppe.  
1.  Survey operations in progress by M/V EGS Pioneer in vicinity of line joining:
50-45.2N 000-09.8W, 50-39.4N 000-01.0W, 50-32.7N 000-03.0W, 50-09.4N 000-10.5E and 49-59.7N 000-46.1E.
2.  Cancel WZ 826.​

WZ 991/20 181525 UTC Sep 20 GMDSS. VHF R/T and DSC services from the Foyers site, unreliable.

UK Coastal

WZ 991/20

181525 UTC Sep 20

​GMDSS.  Aberdeen Coastguard.  VHF R/T and DSC services from the Foyers site 57-14N 004-31W, unreliable.

WZ 984/20 170615 UTC Sep 20 NORTH SEA, UK SECTOR. Dogger Bank north-westward. Underwater operations in progress by cable ship Ile de Brehat.

UK Coastal

WZ 984/20

170615 UTC Sep 20

NORTH SEA, UK SECTOR.
Dogger Bank north-westward.
Underwater operations in progress by cable ship Ile de Brehat in vicinity of line joining: 55-22N 000-42E, 55-14N 000-38W and 55-05N 001-28W.  Wide berth requested.​

WZ 983/20 161320 UTC Sep 20 GMDSS. Aberdeen Coastguard. Gregness MF R/T off air.

UK Coastal

WZ 983/20

161320 UTC Sep 20

GMDSS. 
Aberdeen Coastguard. 
MF R/T services from Gregness site, 57-07.6N 002-03.2W, off air.​

WZ 977/20 141030 UTC Sep 20 Race Bank Wind Farm. Turbine D01, unlit and fog horn inoperative.

UK Coastal

WZ 977/20

141030 UTC Sep 20

ENGLAND, EAST COAST.  
Approaches to The Wash.
Race Bank Wind Farm.
Turbine D01 53-20.1N 000-49.1E, unlit and fog horn inoperative.



NAVAREA I 137/20 140500 UTC Sep 20 RIGLIST. Correct at 140500 UTC Sep 20.

NAVAREA 1

NAVAREA I 137/20

140500 UTC Sep 20

NAVAREA I 137/20 
1. RIGLIST. Correct at 140500 UTC Sep 20
    Southern North Sea: 51N to 55N
    53-03.3N 001-41.2E   Valaris 72 ACP Hewett Gas Field
    53-14.0N 003-14.5E   590021
    53-14.9N 002-01.5E   Ensco 92 ACP Vulcan Gas Field
    53-31.5N 001-09.5E   Energy Endeavour ACP Pickerell Gas Field
    53-32.5N 003-25.4E   Seafox 4 ACP Nam Field
    53-41.8N 003-20.4E   Seafox 2 ACP K5-A
    54-24.4N 002-48.9E   Maersk Resolve ACP D12-B
   
    North Sea: 55N to 60N, East of 5W
    55-43.4N 004-48.0E   Maersk Guardian ACP Tyra Gas Field
    56-16.7N 003-23.7E   Maersk Invincible ACP Valhall Oil Field
    56-43.5N 002-12.5E   Ensco 120 ACP Jasmine Gas Field
    56-55.1N 001-01.5E   Stena Spey
    56-58.0N 001-52.2E   Rowan Gorilla 5 ACP Franklin Gas Field
    57-01.9N 001-57.3E   Valaris 122 ACP Shearwater Oil Field
    57-11.7N 001-54.8E   Maersk Highlander ACP Culzean Gas Field
    57-28.3N 002-07.0E   Ocean Endeavor
    57-29.5N 002-18.0E   Rowan Viking
    57-50.7N 000-54.7W   COSL Pioneer
    57-57.6N 000-55.1W   Noble Sam Hartley ACP Golden Eagle Oil and Gas Field
NEW 57-59.3N 000-45.1E   Paul B Lloyd Junior
    58-06.9N 002-05.1W   Noble Sam Turner
    58-50.7N 001-44.6E   Rowan Stavanger ACP Gudrun Oil and Gas Field
    58-55.3N 002-11.8E   Maersk Integrator ACP Ivar Aasen
    59-22.0N 001-44.6E   Ocean Patriot
NEW NAVAREA XIX          Deepsea Nordkapp
    59-35.4N 001-03.4E   Noble Lloyd Noble ACP Mariner Oil Field
   
    Norwegian Sea: 60N to 65N, East of 5W
    60-30.4N 002-00.9E   Maersk Intrepid
    60-47.3N 003-32.3E   Transocean Equinox
    60-51.3N 003-26.7E   Transocean Endurance
    60-54.6N 003-35.2E   COSL Promoter
    61-05.7N 003-24.0E   West Hercules
    61-22.8N 002-06.1E   Deepsea Atlantic
    61-24.3N 003-59.9E   Deepsea Yantai
    61-30.8N 002-07.4E   Transocean Spitsbergen
    64-01.8N 006-44.6E   West Phoenix
    64-38.8N 007-39.8E   Transocean Norge
    64-56.8N 006-57.1E   West Mira
    South and West Coasts of the British Isles.
    53-32.2N 003-34.8W   Irish Sea Pioneer ACP Douglas Oil 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 135/20.

WZ 976/20 140145 UTC Sep 20 ENGLAND, SOUTH COAST. Portland Bill south-eastwards. Abandoned fishing gear, marked by buoy.

UK Coastal

WZ 976/20

140145 UTC Sep 20

ENGLAND, SOUTH COAST. Portland Bill south-eastwards. Abandoned fishing gear, marked by buoy, in vicinity of 50-30.0N 002-22.9W.​

WZ 975/20 140115 UTC Sep 20 SCOTLAND, WEST COAST. North Channel to the Irish Sea, including Loch Ryan, Belfast Lough and Luce Bay. Intermittent GPS Jamming Exercise.

UK Coastal

WZ 975/20

140115 UTC Sep 20

SCOTLAND, WEST COAST. North Channel to the Irish Sea, including Loch Ryan, Belfast Lough and Luce Bay.
1. Intermittent GPS Jamming Exercise in progress daily 14 to 25 Sep between 0730 and 1500 UTC within 70 miles of 54-50.3N 004-55.8W.
2. Alternative means of navigation should be used during jamming periods to confirm position. GPS equipment should be checked for correct operation when clear of the affected areas or on completion of the exercise.
3. In an emergency jamming may be stopped on request via the MOD West Freugh Range Control on +441766 888932 or +441776 888930.
4. Jamming will not take place in restricted visibility.
5. Cancel this message 251600 UTC Sep 20.​

WZ 967/20 120555 UTC Sep 20 GMDSS. Shetland coastguard. VHF DSC service from Ben Tongue site off air.

UK Coastal

WZ 967/20

120555 UTC Sep 20

GMDSS.
Shetland coastguard.
VHF DSC service from Ben Tongue site, 58-29.7N 004-23.8W, off air.​

WZ 965/20 111645 UTC Sep 20 ENGLAND, NORTH-WEST COAST. Liverpool Bay. Burbo Bank. Turbine BB38 fog signal inoperative.

UK Coastal

WZ 965/20

111645 UTC Sep 20

ENGLAND, NORTH-WEST COAST.
Liverpool Bay. 
Burbo Bank.
1. Turbine BB38, 53-30.1N 003-12.1W, fog signal inoperative.
2. Cancel WZ 803.

WZ 964/20 111625 UTC Sep 20 SOUTHERN NORTH SEA. Between Deep Water Routes. Mast light unlit.

UK Coastal

WZ 964/20

111625 UTC Sep 20

SOUTHERN NORTH SEA.
Between Deep Water Routes. 
1. Mast, 53-10.7N 002-59.1E, light unlit.
2. Cancel WZ 802 ​

NAVAREA I 136/20 111005 UTC Sep 20 NAVAREA I WARNINGS IN FORCE AT 111000 UTC SEP 20.

NAVAREA 1

NAVAREA I 136/20

111005 UTC Sep 20

NAVAREA I 136
1. NAVAREA I WARNINGS IN FORCE AT 111000 UTC SEP 20:
2020 SERIES: 103, 112, 120, 122, 125, 130, 135, 136
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 (103/20 onward) are promulgated via SafetyNET 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(at)ukho.gov.uk
2. Cancel NAVAREA I 133/20.

WZ 962/20 101645 UTC Sep 20 ENGLAND, NORTH-WEST COAST. Approaches to Morecambe Bay. Barrow Windfarm, turbines A1 and A7 unlit.

UK Coastal

WZ 962/20

101645 UTC Sep 20

ENGLAND, NORTH-WEST COAST.
Approaches to Morecambe Bay. 
1.  Barrow Windfarm, 53-59.5N 003-17.5W, turbines A1 and  A7 unlit.
2.  Cancel WZ 796.

WZ 960/20 092200 UTC Sep 20 NORTH SEA. UK SECTOR. Saltire Oil Field . Platform 15/17-A, unlit and foghorn inoperative.

UK Coastal

WZ 960/20

092200 UTC Sep 20

NORTH SEA. UK SECTOR.  
Saltire Oil Field .
Platform 15/17-A, 58-25.0N 000-20.0E, unlit and foghorn inoperative. ​

WZ 956/20 071520 UTC Sep 20 GMDSS. Stornoway Coastguard. VHF DSC Service from Scoval site, off air.

UK Coastal

WZ 956/20

071520 UTC Sep 20

GMDSS. Stornoway Coastguard. VHF DSC Service from Scoval site, 57 27.93N  006 42.15W, off air.​

WZ 954/20 071205 UTC Sep 20 South Minquiers light-buoy, light unreliable.

UK Coastal

WZ 954/20

071205 UTC Sep 20

CHANNEL ISLANDS.
1. South Minquiers light-buoy, 48-53.1N 002-10.1W, light unreliable.
2. Cancel WZ 785.

WZ 952/20 070300 UTC Sep 20 ENGLAND, SOUTH COAST. Western approaches to Plymouth Sound and Whitsand Bay. Multiple subsurface exercise mines established.

UK Coastal

WZ 952/20

070300 UTC Sep 20

ENGLAND, SOUTH COAST. 
Western approaches to Plymouth Sound and Whitsand Bay.
1. Multiple subsurface exercise mines established within area bounded by: 50-21.677N 004-18.529W, 50-17.815N 004-38.660W,
50-12.031N 004-35.676W, 50-13.553N 004-11.556W, 50-17.834N 004-13.018W and 50-20.910N 004-15.498W.
2.  Cancel this message 280001 UTC Sep 20.

WZ 937/20 020920 UTC Sep 20 ENGLAND, EAST COAST. Approaches to Lowestoft. Holm Sand. NW Holm Light-buoy permanently moved.

UK Coastal

WZ 937/20

020920 UTC Sep 20

ENGLAND, EAST COAST.
Approaches to Lowestoft.
Holm Sand.
NW Holm Light-buoy permanently moved to 52-30.9N 001-46.5E.​

WZ 934/20 311600 UTC Aug 20 OUTER HEBRIDES WESTWARD. Whale Rock. Whale Rock light buoy - AIS unreliable.

UK Coastal

WZ 934/20

311600 UTC Aug 20

OUTER HEBRIDES WESTWARD.
Whale Rock.
1. Whale Rock light buoy, 57-54.4N 007-59.9W, AIS unreliable.
2. Cancel WZ 760.

WZ 932/20 311420 UTC Aug 20 ENGLAND, EAST COAST. Southwold Eastward. Survey operations.

UK Coastal

WZ 932/20

311420 UTC Aug 20

ENGLAND, EAST COAST.
Southwold eastward.
1. Survey operations in progress by multiple vessels within area bounded by: 52-21.1N 001-44.3E, 52-40.3N 002-32.9E, 52-40.3N 002-53.5E, 52-20.6N 002-44.2E, 52-01.4N 002-21.1E and 51-59.6N 001-25.9E.  Vessels requested not to anchor in survey area.
2. Cancel WZ 925.

WZ 919/20 271630 UTC Aug 20 SCOTLAND, NORTH COAST. Cape Wrath lighthouse, range temporarily changed.

UK Coastal

WZ 919/20

271630 UTC Aug 20

SCOTLAND, NORTH COAST.
Cape Wrath lighthouse, 58-37.5N 004-59.9W, range temporarily changed to 12 miles.​

WZ 907/20 242320 UTC Aug 20 GMDSS. Stornoway Coastguard. MF R/T service from Tiree Airport site unstable.

UK Coastal

WZ 907/20

242320 UTC Aug 20

GMDSS. Stornoway Coastguard.
MF R/T service from Tiree Airport site, 56-30.0N 006-52.8W, unstable.​

NAVAREA I 125/20 241415 UTC Aug 20 ENGLISH CHANNEL, WESTERN ENTRANCE. Moored Hydrophone, depth 15 metres.

NAVAREA 1

NAVAREA I 125/20

241415 UTC Aug 20

​ENGLISH CHANNEL, WESTERN ENTRANCE.
Chart GB 2647 (INT 1708).
1. Hydrophone, depth 15 metres, moored at 48-56.88N 006-16.54W.
2. Cancel this message 260100 UTC Oct 20.

WZ 903/20 240915 UTC Aug 20 THAMES ESTUARY. Sunk Deep Water Route. Depth less than charted.

UK Coastal

WZ 903/20

240915 UTC Aug 20

THAMES ESTUARY.
Black Deep.   Sunk Deep Water Route.
Depth 15.3 metres located 51-45.40N 001-30.98E.​

NAVAREA I 122/20 211740 UTC Aug 20 NORTH SEA AND NORWEGIAN SEA. Chart 2182D (INT 1040). Seismic survey in progress by M/V SW Amundsen.

NAVAREA 1

NAVAREA I 122/20

211740 UTC Aug 20

NORTH SEA AND NORWEGIAN SEA.
Chart 2182D (INT 1040).
Seismic survey in progress by M/V SW Amundsen towing 12 x 8000 metre long cables within area bounded by 61-52.2N 000-39.0E, 61-52.2N 003-55.0E, 60-48.6N 003-55.0E, 60-48.6N 002-51.2E, 61-18.4N 002-36.0E and 61-18.4N 000-39.0E.
Wide berth of 3 miles ahead and abeam and 6 miles astern requested.
Two guard vessels in attendance.

NAVAREA I 120/20 210430 UTC Aug 20 NORTH SEA, UK SECTOR. Dogger Bank north-westwards. Seismic survey in progress by R/V Amazon Warrior.

NAVAREA 1

NAVAREA I 120/20

210430 UTC Aug 20

NORTH SEA, UK SECTOR. 
Dogger Bank north-westwards. 
Chart GB 2182B (INT 1042).
Seismic survey in progress by R/V Amazon Warrior towing 8 x 7500 metre long cables within area bounded by 55-58.5N 001-30.2E, 55-05.3N 002-51.8E, 54-50.0N 002-51.8E, 54-50.0N 000-59.4E, 55-00.0N 000-23.1E and 55-27.0N 000-07.8W. 
Wide berth of 3 miles ahead and abeam and 6 miles astern requested. 
Three guard vessels in attendance.​

WZ 893/20 202050 UTC Aug 20 GMDSS. Aberdeen Coastguard. VHF R/T service from Inverbervie site off air.

UK Coastal

WZ 893/20

202050 UTC Aug 20

GMDSS.
Aberdeen Coastguard.
VHF R/T service from Inverbervie site, 56-51.1N 002-15.7W, off air.​

WZ 888/20 201400 UTC Aug 20 WALES NORTH COAST. Trywn Du lighthouseight temporarily reduced to 9 miles and fog signal replaced by horn.

UK Coastal

WZ 888/20

201400 UTC Aug 20

WALES NORTH COAST.
Anglesey.
Trywn Du Lighthouse, 53-18.8N 004-005.4W, light temporarily reduced to 9 miles and fog signal replaced by horn.​

WZ 887/20 201140 UTC Aug 20 Walney Windfarm. Aids to Navigation changes.

UK Coastal

WZ 887/20

201140 UTC Aug 20

IRISH SEA, EASTERN PART.
Walney Extension Windfarm.
1.  All charted perimeter buoyage permanently discontinued.
New lights and fog signals established on turbines within area bounded by:
54-00N 003-35W, 54-01N 003-32W, 54-08N 003-41W, 54-10N 003-50W, 54-08N 003-55W and 54-07N 003-55W.
New Cardinal buoys established in: 54-07.880N 003-41.169W, 54-02.885N 003-42.996W and 54-04.869N 003-48.355W.
2.  Cancel WZ 813.

WZ 856/20 141105 UTC Aug 20 NORTH SEA, UK SECTOR. Thistle Oil Field. Platform 211/18-A unlit and all aids to navigation inoperative.

UK Coastal

WZ 856/20

141105 UTC Aug 20

NORTH SEA, UK SECTOR.
Thistle Oil Field.
1. Platform 211/18-A, 61-21.8N 001-34.8E,  unlit and all aids to navigation inoperative.
2. Cancel WZ 710 (GA15).

WZ 845/20 121330 UTC Aug 20 IRISH SEA, EASTERN PART. South Morecambe Gas Field. Platform DP4 110/3, fog horn inoperative

UK Coastal

WZ 845/20

121330 UTC Aug 20

IRISH SEA, EASTERN PART. 
South Morecambe Gas Field.
1. Platform DP4 110/3, 53-52.5N 003-33.7W, fog horn inoperative.
2. Cancel WZ 705.

WZ 831/20 101045 UTC Aug 20 SCOTLAND, Isle of Lewis. Approaches to Kirkibost Harbour. Ardvanish Pt & Tidal Rock lights, unlit

UK Coastal

WZ 831/20

101045 UTC Aug 20

WZ 831
SCOTLAND,  Isle of Lewis, approaches to Kirkibost harbour. 
1. Ardvanish Point light, 58-13.5N 006-47.7W, unlit.
2. Tidal Rock light, 58-13.5N 006-47.6W, unlit.

NAVAREA I 103/20 021400 UTC Aug 20 NORTH SEA, NORWEGIAN SECTOR. Seismic survey in progress by M/V BGP Prospector.

NAVAREA 1

NAVAREA I 103/20

021400 UTC Aug 20

NORTH SEA, NORWEGIAN SECTOR.
Gjoa and Troll Gas and Oilfields.
Chart GB 2182D (INT 1040).
Seismic survey in progress by M/V BGP Prospector towing 10 x 8000 metre long cables within area bounded by 61-03.2N 004-05.3E, 60-48.1N 003-44.2E, 61-08.1N 002-48.1E, 61-19.9N 002-51.7E, 61-33.5N 003-14.6E and 61-14.1N 004-08.9E.
Wide berth of 3 miles ahead and abeam and 7 miles astern requested.
Two guard vessels in attendance.

​​
Ref Date Time Group Description
NAVAREA I 137/20 140500 UTC Sep 20 RIGLIST. Correct at 140500 UTC Sep 20.

NAVAREA 1

NAVAREA I 137/20

140500 UTC Sep 20

NAVAREA I 137/20 
1. RIGLIST. Correct at 140500 UTC Sep 20
    Southern North Sea: 51N to 55N
    53-03.3N 001-41.2E   Valaris 72 ACP Hewett Gas Field
    53-14.0N 003-14.5E   590021
    53-14.9N 002-01.5E   Ensco 92 ACP Vulcan Gas Field
    53-31.5N 001-09.5E   Energy Endeavour ACP Pickerell Gas Field
    53-32.5N 003-25.4E   Seafox 4 ACP Nam Field
    53-41.8N 003-20.4E   Seafox 2 ACP K5-A
    54-24.4N 002-48.9E   Maersk Resolve ACP D12-B
   
    North Sea: 55N to 60N, East of 5W
    55-43.4N 004-48.0E   Maersk Guardian ACP Tyra Gas Field
    56-16.7N 003-23.7E   Maersk Invincible ACP Valhall Oil Field
    56-43.5N 002-12.5E   Ensco 120 ACP Jasmine Gas Field
    56-55.1N 001-01.5E   Stena Spey
    56-58.0N 001-52.2E   Rowan Gorilla 5 ACP Franklin Gas Field
    57-01.9N 001-57.3E   Valaris 122 ACP Shearwater Oil Field
    57-11.7N 001-54.8E   Maersk Highlander ACP Culzean Gas Field
    57-28.3N 002-07.0E   Ocean Endeavor
    57-29.5N 002-18.0E   Rowan Viking
    57-50.7N 000-54.7W   COSL Pioneer
    57-57.6N 000-55.1W   Noble Sam Hartley ACP Golden Eagle Oil and Gas Field
NEW 57-59.3N 000-45.1E   Paul B Lloyd Junior
    58-06.9N 002-05.1W   Noble Sam Turner
    58-50.7N 001-44.6E   Rowan Stavanger ACP Gudrun Oil and Gas Field
    58-55.3N 002-11.8E   Maersk Integrator ACP Ivar Aasen
    59-22.0N 001-44.6E   Ocean Patriot
NEW NAVAREA XIX          Deepsea Nordkapp
    59-35.4N 001-03.4E   Noble Lloyd Noble ACP Mariner Oil Field
   
    Norwegian Sea: 60N to 65N, East of 5W
    60-30.4N 002-00.9E   Maersk Intrepid
    60-47.3N 003-32.3E   Transocean Equinox
    60-51.3N 003-26.7E   Transocean Endurance
    60-54.6N 003-35.2E   COSL Promoter
    61-05.7N 003-24.0E   West Hercules
    61-22.8N 002-06.1E   Deepsea Atlantic
    61-24.3N 003-59.9E   Deepsea Yantai
    61-30.8N 002-07.4E   Transocean Spitsbergen
    64-01.8N 006-44.6E   West Phoenix
    64-38.8N 007-39.8E   Transocean Norge
    64-56.8N 006-57.1E   West Mira
    South and West Coasts of the British Isles.
    53-32.2N 003-34.8W   Irish Sea Pioneer ACP Douglas Oil 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 135/20.

NAVAREA I 136/20 111005 UTC Sep 20 NAVAREA I WARNINGS IN FORCE AT 111000 UTC SEP 20.

NAVAREA 1

NAVAREA I 136/20

111005 UTC Sep 20

NAVAREA I 136
1. NAVAREA I WARNINGS IN FORCE AT 111000 UTC SEP 20:
2020 SERIES: 103, 112, 120, 122, 125, 130, 135, 136
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 (103/20 onward) are promulgated via SafetyNET 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(at)ukho.gov.uk
2. Cancel NAVAREA I 133/20.

NAVAREA I 125/20 241415 UTC Aug 20 ENGLISH CHANNEL, WESTERN ENTRANCE. Moored Hydrophone, depth 15 metres.

NAVAREA 1

NAVAREA I 125/20

241415 UTC Aug 20

​ENGLISH CHANNEL, WESTERN ENTRANCE.
Chart GB 2647 (INT 1708).
1. Hydrophone, depth 15 metres, moored at 48-56.88N 006-16.54W.
2. Cancel this message 260100 UTC Oct 20.

NAVAREA I 122/20 211740 UTC Aug 20 NORTH SEA AND NORWEGIAN SEA. Chart 2182D (INT 1040). Seismic survey in progress by M/V SW Amundsen.

NAVAREA 1

NAVAREA I 122/20

211740 UTC Aug 20

NORTH SEA AND NORWEGIAN SEA.
Chart 2182D (INT 1040).
Seismic survey in progress by M/V SW Amundsen towing 12 x 8000 metre long cables within area bounded by 61-52.2N 000-39.0E, 61-52.2N 003-55.0E, 60-48.6N 003-55.0E, 60-48.6N 002-51.2E, 61-18.4N 002-36.0E and 61-18.4N 000-39.0E.
Wide berth of 3 miles ahead and abeam and 6 miles astern requested.
Two guard vessels in attendance.

NAVAREA I 120/20 210430 UTC Aug 20 NORTH SEA, UK SECTOR. Dogger Bank north-westwards. Seismic survey in progress by R/V Amazon Warrior.

NAVAREA 1

NAVAREA I 120/20

210430 UTC Aug 20

NORTH SEA, UK SECTOR. 
Dogger Bank north-westwards. 
Chart GB 2182B (INT 1042).
Seismic survey in progress by R/V Amazon Warrior towing 8 x 7500 metre long cables within area bounded by 55-58.5N 001-30.2E, 55-05.3N 002-51.8E, 54-50.0N 002-51.8E, 54-50.0N 000-59.4E, 55-00.0N 000-23.1E and 55-27.0N 000-07.8W. 
Wide berth of 3 miles ahead and abeam and 6 miles astern requested. 
Three guard vessels in attendance.​

NAVAREA I 103/20 021400 UTC Aug 20 NORTH SEA, NORWEGIAN SECTOR. Seismic survey in progress by M/V BGP Prospector.

NAVAREA 1

NAVAREA I 103/20

021400 UTC Aug 20

NORTH SEA, NORWEGIAN SECTOR.
Gjoa and Troll Gas and Oilfields.
Chart GB 2182D (INT 1040).
Seismic survey in progress by M/V BGP Prospector towing 10 x 8000 metre long cables within area bounded by 61-03.2N 004-05.3E, 60-48.1N 003-44.2E, 61-08.1N 002-48.1E, 61-19.9N 002-51.7E, 61-33.5N 003-14.6E and 61-14.1N 004-08.9E.
Wide berth of 3 miles ahead and abeam and 7 miles astern requested.
Two guard vessels in attendance.

Ref Date Time Group Description
WZ 995/20 191205 UTC Sep 20 ENGLAND SOUTH COAST. Portland Bill westward. 9 metre Log reported adrift

UK Coastal

WZ 995/20

191205 UTC Sep 20

ENGLAND SOUTH COAST.
Portland Bill westward.
1.  Log, 9 metres in length, reported adrift in vicinity 50-30.9N 002-28.2W at 191136 UTC Sep.
2.  Cancel this message 201136 UTC Sep 20.

WZ 993/20 191010 UTC Sep 20 ENGLISH CHANNEL, EASTERN PART. Brighton to Dieppe. Survey operations in progress by M/V EGS Pioneer.

UK Coastal

WZ 993/20

191010 UTC Sep 20

ENGLISH CHANNEL, EASTERN PART.
Brighton to Dieppe.  
1.  Survey operations in progress by M/V EGS Pioneer in vicinity of line joining:
50-45.2N 000-09.8W, 50-39.4N 000-01.0W, 50-32.7N 000-03.0W, 50-09.4N 000-10.5E and 49-59.7N 000-46.1E.
2.  Cancel WZ 826.​

WZ 991/20 181525 UTC Sep 20 GMDSS. VHF R/T and DSC services from the Foyers site, unreliable.

UK Coastal

WZ 991/20

181525 UTC Sep 20

​GMDSS.  Aberdeen Coastguard.  VHF R/T and DSC services from the Foyers site 57-14N 004-31W, unreliable.

WZ 984/20 170615 UTC Sep 20 NORTH SEA, UK SECTOR. Dogger Bank north-westward. Underwater operations in progress by cable ship Ile de Brehat.

UK Coastal

WZ 984/20

170615 UTC Sep 20

NORTH SEA, UK SECTOR.
Dogger Bank north-westward.
Underwater operations in progress by cable ship Ile de Brehat in vicinity of line joining: 55-22N 000-42E, 55-14N 000-38W and 55-05N 001-28W.  Wide berth requested.​

WZ 983/20 161320 UTC Sep 20 GMDSS. Aberdeen Coastguard. Gregness MF R/T off air.

UK Coastal

WZ 983/20

161320 UTC Sep 20

GMDSS. 
Aberdeen Coastguard. 
MF R/T services from Gregness site, 57-07.6N 002-03.2W, off air.​

WZ 977/20 141030 UTC Sep 20 Race Bank Wind Farm. Turbine D01, unlit and fog horn inoperative.

UK Coastal

WZ 977/20

141030 UTC Sep 20

ENGLAND, EAST COAST.  
Approaches to The Wash.
Race Bank Wind Farm.
Turbine D01 53-20.1N 000-49.1E, unlit and fog horn inoperative.



WZ 976/20 140145 UTC Sep 20 ENGLAND, SOUTH COAST. Portland Bill south-eastwards. Abandoned fishing gear, marked by buoy.

UK Coastal

WZ 976/20

140145 UTC Sep 20

ENGLAND, SOUTH COAST. Portland Bill south-eastwards. Abandoned fishing gear, marked by buoy, in vicinity of 50-30.0N 002-22.9W.​

WZ 975/20 140115 UTC Sep 20 SCOTLAND, WEST COAST. North Channel to the Irish Sea, including Loch Ryan, Belfast Lough and Luce Bay. Intermittent GPS Jamming Exercise.

UK Coastal

WZ 975/20

140115 UTC Sep 20

SCOTLAND, WEST COAST. North Channel to the Irish Sea, including Loch Ryan, Belfast Lough and Luce Bay.
1. Intermittent GPS Jamming Exercise in progress daily 14 to 25 Sep between 0730 and 1500 UTC within 70 miles of 54-50.3N 004-55.8W.
2. Alternative means of navigation should be used during jamming periods to confirm position. GPS equipment should be checked for correct operation when clear of the affected areas or on completion of the exercise.
3. In an emergency jamming may be stopped on request via the MOD West Freugh Range Control on +441766 888932 or +441776 888930.
4. Jamming will not take place in restricted visibility.
5. Cancel this message 251600 UTC Sep 20.​

WZ 967/20 120555 UTC Sep 20 GMDSS. Shetland coastguard. VHF DSC service from Ben Tongue site off air.

UK Coastal

WZ 967/20

120555 UTC Sep 20

GMDSS.
Shetland coastguard.
VHF DSC service from Ben Tongue site, 58-29.7N 004-23.8W, off air.​

WZ 965/20 111645 UTC Sep 20 ENGLAND, NORTH-WEST COAST. Liverpool Bay. Burbo Bank. Turbine BB38 fog signal inoperative.

UK Coastal

WZ 965/20

111645 UTC Sep 20

ENGLAND, NORTH-WEST COAST.
Liverpool Bay. 
Burbo Bank.
1. Turbine BB38, 53-30.1N 003-12.1W, fog signal inoperative.
2. Cancel WZ 803.

WZ 964/20 111625 UTC Sep 20 SOUTHERN NORTH SEA. Between Deep Water Routes. Mast light unlit.

UK Coastal

WZ 964/20

111625 UTC Sep 20

SOUTHERN NORTH SEA.
Between Deep Water Routes. 
1. Mast, 53-10.7N 002-59.1E, light unlit.
2. Cancel WZ 802 ​

WZ 962/20 101645 UTC Sep 20 ENGLAND, NORTH-WEST COAST. Approaches to Morecambe Bay. Barrow Windfarm, turbines A1 and A7 unlit.

UK Coastal

WZ 962/20

101645 UTC Sep 20

ENGLAND, NORTH-WEST COAST.
Approaches to Morecambe Bay. 
1.  Barrow Windfarm, 53-59.5N 003-17.5W, turbines A1 and  A7 unlit.
2.  Cancel WZ 796.

WZ 960/20 092200 UTC Sep 20 NORTH SEA. UK SECTOR. Saltire Oil Field . Platform 15/17-A, unlit and foghorn inoperative.

UK Coastal

WZ 960/20

092200 UTC Sep 20

NORTH SEA. UK SECTOR.  
Saltire Oil Field .
Platform 15/17-A, 58-25.0N 000-20.0E, unlit and foghorn inoperative. ​

WZ 956/20 071520 UTC Sep 20 GMDSS. Stornoway Coastguard. VHF DSC Service from Scoval site, off air.

UK Coastal

WZ 956/20

071520 UTC Sep 20

GMDSS. Stornoway Coastguard. VHF DSC Service from Scoval site, 57 27.93N  006 42.15W, off air.​

WZ 954/20 071205 UTC Sep 20 South Minquiers light-buoy, light unreliable.

UK Coastal

WZ 954/20

071205 UTC Sep 20

CHANNEL ISLANDS.
1. South Minquiers light-buoy, 48-53.1N 002-10.1W, light unreliable.
2. Cancel WZ 785.

WZ 952/20 070300 UTC Sep 20 ENGLAND, SOUTH COAST. Western approaches to Plymouth Sound and Whitsand Bay. Multiple subsurface exercise mines established.

UK Coastal

WZ 952/20

070300 UTC Sep 20

ENGLAND, SOUTH COAST. 
Western approaches to Plymouth Sound and Whitsand Bay.
1. Multiple subsurface exercise mines established within area bounded by: 50-21.677N 004-18.529W, 50-17.815N 004-38.660W,
50-12.031N 004-35.676W, 50-13.553N 004-11.556W, 50-17.834N 004-13.018W and 50-20.910N 004-15.498W.
2.  Cancel this message 280001 UTC Sep 20.

WZ 937/20 020920 UTC Sep 20 ENGLAND, EAST COAST. Approaches to Lowestoft. Holm Sand. NW Holm Light-buoy permanently moved.

UK Coastal

WZ 937/20

020920 UTC Sep 20

ENGLAND, EAST COAST.
Approaches to Lowestoft.
Holm Sand.
NW Holm Light-buoy permanently moved to 52-30.9N 001-46.5E.​

WZ 934/20 311600 UTC Aug 20 OUTER HEBRIDES WESTWARD. Whale Rock. Whale Rock light buoy - AIS unreliable.

UK Coastal

WZ 934/20

311600 UTC Aug 20

OUTER HEBRIDES WESTWARD.
Whale Rock.
1. Whale Rock light buoy, 57-54.4N 007-59.9W, AIS unreliable.
2. Cancel WZ 760.

WZ 932/20 311420 UTC Aug 20 ENGLAND, EAST COAST. Southwold Eastward. Survey operations.

UK Coastal

WZ 932/20

311420 UTC Aug 20

ENGLAND, EAST COAST.
Southwold eastward.
1. Survey operations in progress by multiple vessels within area bounded by: 52-21.1N 001-44.3E, 52-40.3N 002-32.9E, 52-40.3N 002-53.5E, 52-20.6N 002-44.2E, 52-01.4N 002-21.1E and 51-59.6N 001-25.9E.  Vessels requested not to anchor in survey area.
2. Cancel WZ 925.

WZ 919/20 271630 UTC Aug 20 SCOTLAND, NORTH COAST. Cape Wrath lighthouse, range temporarily changed.

UK Coastal

WZ 919/20

271630 UTC Aug 20

SCOTLAND, NORTH COAST.
Cape Wrath lighthouse, 58-37.5N 004-59.9W, range temporarily changed to 12 miles.​

WZ 907/20 242320 UTC Aug 20 GMDSS. Stornoway Coastguard. MF R/T service from Tiree Airport site unstable.

UK Coastal

WZ 907/20

242320 UTC Aug 20

GMDSS. Stornoway Coastguard.
MF R/T service from Tiree Airport site, 56-30.0N 006-52.8W, unstable.​

WZ 903/20 240915 UTC Aug 20 THAMES ESTUARY. Sunk Deep Water Route. Depth less than charted.

UK Coastal

WZ 903/20

240915 UTC Aug 20

THAMES ESTUARY.
Black Deep.   Sunk Deep Water Route.
Depth 15.3 metres located 51-45.40N 001-30.98E.​

WZ 893/20 202050 UTC Aug 20 GMDSS. Aberdeen Coastguard. VHF R/T service from Inverbervie site off air.

UK Coastal

WZ 893/20

202050 UTC Aug 20

GMDSS.
Aberdeen Coastguard.
VHF R/T service from Inverbervie site, 56-51.1N 002-15.7W, off air.​

WZ 888/20 201400 UTC Aug 20 WALES NORTH COAST. Trywn Du lighthouseight temporarily reduced to 9 miles and fog signal replaced by horn.

UK Coastal

WZ 888/20

201400 UTC Aug 20

WALES NORTH COAST.
Anglesey.
Trywn Du Lighthouse, 53-18.8N 004-005.4W, light temporarily reduced to 9 miles and fog signal replaced by horn.​

WZ 887/20 201140 UTC Aug 20 Walney Windfarm. Aids to Navigation changes.

UK Coastal

WZ 887/20

201140 UTC Aug 20

IRISH SEA, EASTERN PART.
Walney Extension Windfarm.
1.  All charted perimeter buoyage permanently discontinued.
New lights and fog signals established on turbines within area bounded by:
54-00N 003-35W, 54-01N 003-32W, 54-08N 003-41W, 54-10N 003-50W, 54-08N 003-55W and 54-07N 003-55W.
New Cardinal buoys established in: 54-07.880N 003-41.169W, 54-02.885N 003-42.996W and 54-04.869N 003-48.355W.
2.  Cancel WZ 813.

WZ 856/20 141105 UTC Aug 20 NORTH SEA, UK SECTOR. Thistle Oil Field. Platform 211/18-A unlit and all aids to navigation inoperative.

UK Coastal

WZ 856/20

141105 UTC Aug 20

NORTH SEA, UK SECTOR.
Thistle Oil Field.
1. Platform 211/18-A, 61-21.8N 001-34.8E,  unlit and all aids to navigation inoperative.
2. Cancel WZ 710 (GA15).

WZ 845/20 121330 UTC Aug 20 IRISH SEA, EASTERN PART. South Morecambe Gas Field. Platform DP4 110/3, fog horn inoperative

UK Coastal

WZ 845/20

121330 UTC Aug 20

IRISH SEA, EASTERN PART. 
South Morecambe Gas Field.
1. Platform DP4 110/3, 53-52.5N 003-33.7W, fog horn inoperative.
2. Cancel WZ 705.

WZ 831/20 101045 UTC Aug 20 SCOTLAND, Isle of Lewis. Approaches to Kirkibost Harbour. Ardvanish Pt & Tidal Rock lights, unlit

UK Coastal

WZ 831/20

101045 UTC Aug 20

WZ 831
SCOTLAND,  Isle of Lewis, approaches to Kirkibost harbour. 
1. Ardvanish Point light, 58-13.5N 006-47.7W, unlit.
2. Tidal Rock light, 58-13.5N 006-47.6W, unlit.

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.