Underwater operations in progress until further notice by M/V jean charcot along trackline between 49-55N…
North Atlantic Ocean · HYDROLANT 1701/99
What this record establishes
Archived notice · 1999-08-16 01:59Z
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 1459/99 (& 1695/99);1690/99: MARIDIPART LA SPEZIA 503/99 131947Z AUG 99; 1691/99: WZ 1457/99 132106Z AUG 99.. Issued 1999-08-14 01:40Z. 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
- Derelict nine meter yacht adrift in 43-54N 008-35E at 122050Z augcancelled by this notice
- Gasker light 57-59N 007-17W unreliablecancelled by this notice
- Underwater operations in progress until further notice by M/V jean charcot along trackline between 49-57N…cancelled by this notice
Current notices and reporting history in the North Atlantic Ocean →
- issued
- 1999-08-14 01:40Z
- status
- Archived notice
- authority
- WZ 1459/99 (& 1695/99);1690/99: MARIDIPART LA SPEZIA 503/99 131947Z AUG 99; 1691/99: WZ 1457/99 132106Z AUG 99.
- issued by
- WZ
- sea
- North Atlantic Ocean
- position
- 49.875, -11.833
- 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 49-55N 011-36W AND 49-50N 012-04W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 1690/99(53), 1691/99(35), 1695/99.
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
135 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 232200Z sep to 162200Z oct in area bound by 48-09.80N 010-49.32W, 48-14.80N 011-20.49W,…2024-09-20
- 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 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 18 jan thru 01 feb by M/V beautemps beaupre in areas bound by: a. 48-12N 008-15W, 48-07N…2021-01-15
- Survey operations in progress until further notice by M/V ridley thomas along trackline joining 48-29.2N…2020-08-30
- Survey operations in progress until further notice by M/V ridley thomas in vicinity of trackline joining…2020-08-03
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
55 survey operations listed in force · see all
Record snapshot 2026-10-02 08:52Z; 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.