Underwater operations in progress until further notice by M/V geo searcher between 55-17N 009-52W and 55-16N…
North Atlantic Ocean · HYDROLANT 1668/99
What this record establishes
Archived notice · 1999-08-11 15:08Z
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) · WZ 1425/99 100957Z AUG 99. Issued 1999-08-10 13:29Z. 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
- North Atlantic Ocean. 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 North Atlantic Ocean →
- issued
- 1999-08-10 13:29Z
- status
- Archived notice
- authority
- WZ 1425/99 100957Z AUG 99
- issued by
- WZ
- sea
- North Atlantic Ocean
- position
- 55.275, -9.958
- vessel
- M/V GEO SEARCHER · 89 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V GEO SEARCHER BETWEEN 55-17N 009-52W AND 55-16N 010-03W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 1654/99.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROLANT
- The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
Collected reports in this area · survey operations
87 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 in progress until 31 oct by M/V ramform vanguard towing cables in area bound by 53-44.12N…2024-09-26
- Survey operations in progress until 20 jul by M/V celtic explorer in vicinity of trackline joining 47-30.00N…2023-06-14
- Underwater operations in progress until further notice by M/V normand frontier in vicinity of trackline…2020-10-25
- Underwater operations in progress until 050100Z jun in area bound by 56-38N 006-48W, 59-06N 006-48W, 59-06N…2020-05-03
- Underwater operations in progress until 24 jan by M/V sd northern river with submersible in area bound by…2018-01-15
- Underwater operations 0800Z to 2000Z daily 19 and 20 jul by M/V sd northern river in area within ten miles…2017-07-18
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 2026-10-03 00:02Z; 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.