Cable operations in progress until further notice by cableship ile de sein along trackline joining 01-28.20N…
Gulf of Guinea · HYDROLANT 412/24
What this record establishes
Archived notice · 2024-03-10 04:05Z
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 54/24 280601Z FEB 24.. Issued 2024-02-28 06:43Z. 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.
Related notices and cancellation links
- Cable operations in progress until further notice by cableship ile de sein along trackline joining 00-24.40N…cancelled by this notice
- Cancel HYDROLANT 412/24 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Gulf of Guinea →
- issued
- 2024-02-28 06:43Z
- status
- Archived notice
- authority
- NAVAREA II 54/24 280601Z FEB 24.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- Gulf of Guinea
- position
- 1.840, 5.376
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF GUINEA. SAO TOME AND PRINCIPE. DNC 01. 1. CABLE OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY CABLESHIP ILE DE SEIN ALONG TRACKLINE JOINING 01-28.20N 005-50.50E, 02-12.60N 004-54.60E. 2. CANCEL HYDROLANT 355/24.
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.
- 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.
- 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
35 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.
- Cable operations in progress until further notice by cableship ile de sein along trackline joining 03-00.70N…2024-05-04
- Cable operations in progress until 22 apr by cableship ile de sein along trackline joining 02-12.61N…2024-04-17
- Cable operations 06 apr until further notice by cableship ile de sein along trackline joining 03-14.80N…2024-04-05
- Cable operations in progress until further notice by cableship ile de sein along trackline joining 00-24.40N…2024-02-20
- Cable operations in progress until further notice by cableship ile de sein along trackline joining 00-28.70N…2024-02-11
- Seismic survey in progress until 010001Z jul by M/V bgp prospector towing ten six mile long cables in area…2023-03-09
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
Worldwide in the collected sources
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 00:59Z; 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.