Seismic survey 20 nov thru 31 jan 14 by M/V wg tasman towing ten 8000 meter long cables in area bound by…
Gulf of Guinea · HYDROLANT 2990/13
What this record establishes
Archived notice · 2014-01-23 10:35Z
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 316/13 CORRECTED 250749Z NOV 13.. Issued 2013-11-25 08:03Z. 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 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
- Seismic survey 20 nov thru 31 jan 14 by M/V tasman towing six 3200 meter long cables in area bound by…cancelled by this notice
- Cancel HYDROLANT 2990/13 and this msg, survey completedlater cancellation notice
Current notices and reporting history in the Gulf of Guinea →
- issued
- 2013-11-25 08:03Z
- status
- Archived notice
- authority
- NAVAREA II 316/13 CORRECTED 250749Z NOV 13.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- Gulf of Guinea
- position
- 1.833, 8.996
- vessel
- M/V WG TASMAN · 108 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF GUINEA. EQUATORIAL GUINEA. 1. SEISMIC SURVEY 20 NOV THRU 31 JAN 14 BY M/V WG TASMAN TOWING TEN 8000 METER LONG CABLES IN AREA BOUND BY 02-04.54N 008-34.23E, 02-04.54N 009-25.70E, 01-42.34N 009-25.70E, 01-35.29N 009-22.60E, 01-35.30N 008-34.23E. FIVE MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 2924/13. 3. CANCEL THIS MSG 01 FEB 14.
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.
- Towed array / streamer
- Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
- Tow / towing
- A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
- 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.
- 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 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 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
- Seismic survey in progress until 01 dec by M/V polar marquis towing 12 8100 meter long cables2018-10-23
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 2026-10-04 04:33Z; 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.