Underwater operations by M/V thalassa: a. 10 apr vicinity of trackline 44-05N 007-04W and 44-00N 006-53W
Bay of Biscay · HYDROLANT 574/07
What this record establishes
Archived notice · 2007-04-10 17:05Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA II 137/07 081500Z APR 07.. Issued 2007-04-08 16:44Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Bay of Biscay. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
Related notices and cancellation links
Current notices and reporting history in the Bay of Biscay →
- issued
- 2007-04-08 16:44Z
- status
- Archived notice
- authority
- NAVAREA II 137/07 081500Z APR 07.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- Bay of Biscay
- position
- 44.015, -6.798
- vessel
- M/V THALASSA · 139 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS BY M/V THALASSA:
A. 10 APR VICINITY OF TRACKLINE 44-05N 007-04W AND 44-00N 006-53W.
B. 11 APR VICINITY OF TRACKLINE 44-00N 006-53W,
44-00N 006-42W, 44-00N 006-31W.
ONE MILE BERTH REQUESTED.
2. CANCEL THIS MSG 12 APR.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- Track line joining
- Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · survey operations
73 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- Survey operations by M/V sarmeinto de gamboa: a. 06 oct in 41-52.70N 009-48.60W2023-10-05
- 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 in progress until 112200Z oct by M/V emma bardan in area bound by 48-00.00N 005-50.00W,…2023-08-16
- Survey operations 30 oct thru 26 nov by M/V meteor in area bound by 48-09.00N 005-55.00W, 44-03.00N…2022-10-28
- Survey operations 02 thru 29 nov by M/V cotes de la manche in area bound by 43-26.00N 008-02.00W, 48-27.00N…2022-10-28
- Scientific moorings established until 13 sep in: a. 46-06.57N 006-47.05W2022-09-01
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-01 12:54Z; source collection times vary.
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.