Underwater operations in progress until further notice by cableship decisive in area bound by 50-54.20N…
Celtic Sea · HYDROLANT 669/24
What this record establishes
Archived notice · 2024-04-10 16:45Z
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 248/24 011300Z APR 24.. Issued 2024-04-01 13:17Z. 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
- Celtic Sea. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
- issued
- 2024-04-01 13:17Z
- status
- Archived notice
- authority
- WZ 248/24 011300Z APR 24.
- issued by
- WZ
- sea
- Celtic Sea
- position
- 50.807, -5.568
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
CELTIC SEA. ENGLAND. DNC 20. 1. UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY CABLESHIP DECISIVE IN AREA BOUND BY 50-54.20N 005-40.70W, 50-42.60N 005-40.70W, 50-42.60N 005-27.50W, 50-54.20N 005-27.50W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 644/24.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- 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.
- Cable operations
- A ship is laying, burying or repairing a submarine cable, usually along a stated route.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- 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 · cable & pipeline work
722 within 180 nm since 1998 · 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.
- Cable operations in progress until further notice by cableship ile d'ouessant in vicinity of trackline…2024-08-25
- Cable operations 130001Z thru 280100Z may by cableship athena along trackline joining 49-09.57N 005-37.48W,…2024-05-09
- Cable operations in progress until 03 jun by cableship detector along trackline joining 48-45.15N…2024-05-03
- Cable operations in progress until further notice by cableship detector along trackline joining 51-18.40N…2024-05-01
- Cable operations in progress until further notice by cableship detector along trackline joining 51-18.40N…2024-05-01
- Underwater operations in progress until further notice by cableship decisive in areas bound by: a. 50-31.50N…2024-04-25
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
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-01 15:27Z; source collection times vary.
Cable ops
Cable laying, pipeline and seismic operations. All current cable & pipeline work →
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.