Surveys
Underwater operations in progress sunrise to sunset until 291800Z nov by M/V thalassa within 20 miles of: a.…
HYDROLANT 2562/99
- issued
- 1999-11-28 07:55Z
- status
- cancelled 1999-11-29 19:00Z (archive)
- self-cancels
- 1999-11-29 19:00Z
- authority
- WZ 2119/99 280631Z NOV 99
- sea
- Celtic Sea
- position
- 49.583, -7.667
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS IN PROGRESS SUNRISE TO SUNSET UNTIL 291800Z NOV BY M/V THALASSA WITHIN 20 MILES OF: A. 49-40N 007-40W ON 28 NOV. B. 49-30N 007-40W ON 29 NOV. 2. CANCEL THIS MSG 291900Z NOV.
This area · survey operations
729 within 180 nm since 1999 · 0 in the last 12 months · 0 in force now
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- Underwater operations 02 thru 11 oct by M/V atalante in area bound by 47-26.59N 006-34.33W, 46-52.40N…2023-09-29
- 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 19 thru 25 apr in area bound by 48-00.00N 009-29.00W, 48-00.00N 007-56.00W, 46-54.00N…2023-04-17
- 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
- Survey operations 27 oct thru 02 nov 22 along trackline joining 48-04.62N 009-30.35W, 47-27.00N 008-32.00W,…2022-10-25
Season · when survey operations happen here
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month of issue, all years in the archive
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.