Surveys
Underwater operations in progress from sunrise to sunset thru 161800Z nov by M/V thalassa within 30 miles…
HYDROLANT 2453/99
- issued
- 1999-11-15 12:06Z
- status
- cancelled 1999-11-16 19:00Z (archive)
- self-cancels
- 1999-11-16 19:00Z
- authority
- WZ 2037/99 151026Z NOV 99
- position
- 49.708, -10.583
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS IN PROGRESS FROM SUNRISE TO SUNSET THRU 161800Z NOV BY M/V THALASSA WITHIN 30 MILES OF: A. 49-25N 010-10W ON 15 NOV. B. 50-00N 011-00W ON 16 NOV. 2. CANCEL THIS MSG 161900Z NOV.
This area · survey operations
277 within 180 nm since 1999 · 0 in the last 12 months · 0 in force now
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- 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 27 oct thru 02 nov 22 along trackline joining 48-04.62N 009-30.35W, 47-27.00N 008-32.00W,…2022-10-25
- Survey operations 06 thru 11 oct by M/V beautemps-beaupre in areas bound by: a. 48-19.00N 006-30.00W,…2022-10-05
- Survey operations 04 thru 14 aug by M/V thalassa in 47-36.72N 007-32.19W2022-08-02
- Underwater operations by M/V atalante 12 thru 16 jan in area within one mile of: a. 46-07N 007-14W2022-01-11
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
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.