Surveys
Underwater operations in progress sunrise to sunset until 201800Z nov by M/V thalassa within 20 miles of: a.…
HYDROLANT 2480/99
- issued
- 1999-11-19 14:19Z
- status
- cancelled 1999-11-20 19:00Z (archive)
- self-cancels
- 1999-11-20 19:00Z
- cancels
- HYDROLANT 2473/99
- authority
- WZ 2064/99 191111Z NOV 99
- sea
- Celtic Sea
- position
- 50.625, -8.333
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS IN PROGRESS SUNRISE TO SUNSET UNTIL 201800Z NOV BY M/V THALASSA WITHIN 20 MILES OF: A. 50-30N 009-00W ON 19 NOV. B. 50-45N 007-40W ON 20 NOV. 2. CANCEL HYDROLANT 2473/99. 3. CANCEL THIS MSG 201900Z NOV.
This area · survey operations
609 within 180 nm since 1999 · 0 in the last 12 months · 0 in force now
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- Survey operations in progress until 20 jul by M/V celtic explorer in vicinity of trackline joining 47-30.00N…2023-06-14
- Survey operations 072201Z to 112159Z jun by vessel nanoplon in area within one mile of 48-20.67N 008-22.08W2023-06-06
- Survey operations 06 thru 11 jan by M/V belgica in area bound by 48-14.00N 005-05.00W, 47-28.00N 005-10.00W,…2023-01-04
- Underwater operations 180800Z to 192200Z nov by M/V willchallenge in vicinity of 50-19.0N 004-14.7W2022-11-17
- Underwater operations in progress until further notice by unmanned submersible ALR4 in vicinity of trackline…2022-06-10
- Underwater operations in progress until further notice by submersible in vicinity of trackline joining…2022-05-10
Season · when survey operations happen here
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month of issue, all years in the archive
Timeline
Nearby now · within 120 nm
Nothing else in force within 120 nm.
Worldwide now
84 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.