Underwater operations in progress until further notice by M/V jean charcot along trackline between 49-30N…
North Atlantic Ocean · HYDROLANT 1727/99
What this record establishes
Archived notice · 1999-08-19 01:58Z
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 1490/99 180021Z AUG 99. Issued 1999-08-18 01:35Z. 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
- Underwater operations in progress until further notice by M/V jean charcot along trackline between 49-28N…cancelled by this notice
- Cancel HYDROLANT 1727/99 and this msglater cancellation notice
Current notices and reporting history in the North Atlantic Ocean →
- issued
- 1999-08-18 01:35Z
- status
- Archived notice
- authority
- WZ 1490/99 180021Z AUG 99
- issued by
- WZ
- sea
- North Atlantic Ocean
- position
- 49.517, -17.683
- vessel
- M/V JEAN CHARCOT · 25 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 JEAN CHARCOT ALONG TRACKLINE BETWEEN 49-30N 016-42W AND 49-32N 018-40W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 1712/99.
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.
- 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.
- 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
5 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 further notice by M/V thalassa along trackline between 47-17.4N…2018-06-24
- Hydrographic survey in progress until 09 jun by M/V thalassa along trackline joining 48-25.0N 005-46.2W,…2015-06-06
- Underwater operations in progress until 28 jun by M/V meteor along trackline joining 49-08.50N 011-16.97W,…2011-06-27
- Underwater operations in progress until further notice by M/V jean charcot along trackline between 49-28N…1999-08-16
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
- Pap odas buoy relocated to 48-56.30N 016-22.50WNav aids · 61.9 nm
Worldwide in the collected sources
50 survey operations listed in force · see all
Record snapshot 2026-09-25 01:57Z; 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.