Cable operations in progress until further notice by c/s ile de sein in vicinity of trackline joining…
North Atlantic Ocean · HYDROLANT 509/21
What this record establishes
Archived notice · 2021-03-04 21:01Z
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 80/21 221211Z FEB 21.. Issued 2021-02-22 12:18Z. 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
- Cable operations 180800Z feb until further notice by cableship ile de sein along trackline joining 14-54.0N…cancelled by this notice
- Cancel HYDROLANT 509/21 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the North Atlantic Ocean →
- issued
- 2021-02-22 12:18Z
- status
- Archived notice
- authority
- NAVAREA II 80/21 221211Z FEB 21.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- North Atlantic Ocean
- position
- 11.358, -26.644
- vessel
- C/S ILE DE SEIN · 23 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH ATLANTIC. CAPE VERDE. DNC 01. 1. CABLE OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY C/S ILE DE SEIN IN VICINITY OF TRACKLINE JOINING 14-48.2N 024-03.6W, 14-43.3N 024-08.8W, 14-32.9N 024-10.9W, 12-40.6N 025-42.3W, 10-22.1N 027-19.0W, 09-56.7N 027-48.6W, 09-36.4N 027-52.8W, 08-55.6N 028-35.0W, 08-22.5N 028-50.3W, 07-56.5N 029-13.9W. TWO MILE BERTH REQUESTED 2. CANCEL HYDROLANT 468/21.
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.
- Cable operations
- A ship is laying, burying or repairing a submarine cable, usually along a stated route.
- 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 · cable & pipeline work
1 within 180 nm since 2021 · 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.
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 2026-10-02 08:19Z; 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.