Surveys
Underwater operations in progress until further notice by M/V deep helder in vicinity of trackline between…
North Sea · Dover Strait · England · HYDROLANT 3816/17
- issued
- 2017-11-25 15:33Z
- status
- cancelled 2017-11-30 11:03Z (archive)
- cancels
- HYDROLANT 3775/17
- authority
- WZ 1475/17 251205Z NOV 17.
- position
- 51.317, 1.798
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
NORTH SEA. DOVER STRAIT. ENGLAND. DNC 20. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V DEEP HELDER IN VICINITY OF TRACKLINE BETWEEN 51-18.5N 001-28.2E AND 51-19.5N 002-07.5E. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 3775/17.
This area · survey operations
476 within 180 nm since 1997 · 0 in the last 12 months · 0 in force now
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- Survey operations in progress until further notice by M/V mintaka I in vicinity of trackline joining…2023-08-06
- Survey operations 15 sept thru 20 oct by M/V thlassa in vicinity of trackline joining 48-30.00N 006-00.00W,…2022-09-14
- Underwater operations in progress until further notice by M/V uilenspiegel and c/s responder in vicinity of…2022-07-18
- Survey operations in progress until further notice by M/V nora b in vicinity of trackline joining 51-22.80N…2022-07-16
- Survey operations in progress until further notice by M/V nora b in vicinity of trackline joining 50-46.80N…2022-07-12
- Underwater operations in progress until further notice by M/V uilenspiegel in vicinity of trackline joining…2022-07-09
Season · when survey operations happen here
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month of issue, all years in the archive
Timeline
- Underwater operations in progress until further notice by M/V deep helder in vicinity of trackline between…cancels · 2017-11-23
- Underwater operations in progress until further notice by M/V deep helder in vicinity of trackline between…replaced · 2017-11-23
- Odas buoy K4 adrift in 54-43.8N 012-39.6W at 300900Z novcancelled by · 2017-11-30
Nearby now · within 120 nm
- Sandettie west buoy 51-15.1N 001-54.5E missingNav aids · 5.7 nm
- Goodwin sands eastwardsNav aids · 9.2 nm
- Turbine G27, 52-19.8N 002-33.5E, fog signal inoperativeNav aids · 67.1 nm
- Mid haisbro buoy 52-54.2N 001-41.6E unlitNav aids · 95.3 nm
- Leman gas fieldNav aids · 105.8 nm
- Platform southwark 53-11.0N 002-05.8E unlit and all navaids inoperativeNav aids · 112.6 nm
Worldwide now
75 survey operations in force · see all
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.