Seismic survey in progress until 22 nov within three miles of 06-00.38N 001-21.58E
Gulf of Guinea · HYDROLANT 2212/12
What this record establishes
Archived notice · 2012-11-23 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 320/12 23 SEP 12. Issued 2012-09-23 16:56Z. 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 parsed report position is 6.006, 1.360 with a 3.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Seismic survey in progress until 22 nov within three miles of 06-00.38N 001-21.58Ecancelled by this notice
Current notices and reporting history in the Gulf of Guinea →
- issued
- 2012-09-23 16:56Z
- status
- Archived notice
- authority
- NAVAREA II 320/12 23 SEP 12
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- Gulf of Guinea
- position
- 6.006, 1.360 · r 3.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF GUINEA. TOGO. 1. SEISMIC SURVEY IN PROGRESS UNTIL 22 NOV WITHIN THREE MILES OF 06-00.38N 001-21.58E. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 2200/12. 3. CANCEL THIS MSG 23 NOV 12.
Reading this warning
- Seismic survey
- A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · cable & pipeline work
58 within 180 nm since 2003 · 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 until 02 may by cableship ile de sein along trackline joining 04-49.10N 002-51.80E,…2024-04-26
- Cable operations in progress until 02 may by cableship ile de sein along trackline joining 04-49.10N…2024-04-26
- Cable operations in progress until further notice by cableship ile de sein along trackline joining 06-24.00N…2024-03-22
- Cable operations 011200Z nov until further notice by cableship leon thevenin in vicinity 05-30.00N 000-11.00W2023-10-30
- Cable operations 080001Z to 160001Z aug by cableship leon thevenin in area bound by 05-31.00N 000-12.00W,…2022-08-06
- Cable operations 19 thru 25 mar by cableship ile de brehat along trackline joining 06-10.1N 001-21.6E,…2022-03-18
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
23 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 21:42Z; 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.