Cable ops

Cable operations in progress until 22 apr by cableship ile de sein along trackline joining 02-12.61N…

Gulf of Guinea · HYDROLANT 813/24

What this record establishes

Archived notice · 2024-04-23 00:01Z

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 109/24 170202Z APR 24.. Issued 2024-04-17 04:00Z. 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: Gulf of Guinea. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Current notices and reporting history in the Gulf of Guinea →

issued: 2024-04-17 04:00Z
status: Archived notice
self-cancels: 2024-04-23 00:01Z
authority: NAVAREA II 109/24 170202Z APR 24.
NAVAREA: NAVAREA II · named as the source of this relay
sea: Gulf of Guinea
position: 3.536, 3.853
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

GULF OF GUINEA.
DNC 01.
1. CABLE OPERATIONS IN PROGRESS UNTIL
   22 APR BY CABLESHIP ILE DE SEIN
   ALONG TRACKLINE JOINING
   02-12.61N 004-54.59E, 02-12.61N 004-54.58E,
   02-40.08N 004-20.90E, 03-18.25N 003-50.09E,
   04-40.90N 003-18.07E, 04-48.94N 003-07.27E,
   04-51.29N 002-53.76E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 230001Z APR 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.
Cable operations: A ship is laying, burying or repairing a submarine cable, usually along a stated route.
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.
CANCEL THIS MSG: The warning's own expiry: a line telling the reader when the message cancels itself.
Date-time group (DTG): A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.

All warning terms →

Collected reports in this area · cable & pipeline work

45 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.

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

Last known positions of mobile oil rigs and drill ships at 040430 UTC sep 26Surveys · 91 nm

Worldwide in the collected sources

24 cable & pipeline work listed in force · see all

Record snapshot 2026-10-02 00:28Z; 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.