Surveys
Underwater operations in progress until 261800Z nov by M/V thalassa within 20 miles of 48-30N 008-30W
HYDROLANT 2538/99
- issued
- 1999-11-26 08:30Z
- status
- cancelled 1999-11-26 10:30Z (archive)
- self-cancels
- 1999-11-26 19:00Z
- authority
- WZ 2106/99 260747Z NOV 99
- sea
- Celtic Sea
- position
- 48.500, -8.500 · r 20.0 nm
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 261800Z NOV BY M/V THALASSA WITHIN 20 MILES OF 48-30N 008-30W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 261900Z NOV.
This area · survey operations
512 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 in progress until 060001Z oct by M/V pourquoi pas in area bound by 47-17.05N 009-17.05W,…2023-09-25
- 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
- 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
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.