Seismic survey 260001Z aug to 122359Z sep by M/V polarcus alima towing 12 8100 meter long cables in area…
North Atlantic Ocean · HYDROLANT 2032/14
What this record establishes
Archived notice · 2014-09-13 01:00Z
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 283/14 250041Z AUG 14.. Issued 2014-08-25 01:10Z. 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 an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Current notices and reporting history in the North Atlantic Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2014-08-26 00:01Z | 2014-09-12 23:59Z | — | 431 h 58 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2014-08-25 01:10Z
- status
- Archived notice
- self-cancels
- 2014-09-13 00:59Z
- authority
- NAVAREA II 283/14 250041Z AUG 14.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- North Atlantic Ocean
- position
- 6.636, -13.061
- vessel
- M/V POLARCUS ALIMA · 115 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH ATLANTIC. SIERRA LEONE. 1. SEISMIC SURVEY 260001Z AUG TO 122359Z SEP BY M/V POLARCUS ALIMA TOWING 12 8100 METER LONG CABLES IN AREA BOUND BY 06-36.5N 013-17.7W, 06-52.1N 013-05.0W, 06-38.4N 012-50.1W, 06-25.0N 013-01.0W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 130059Z SEP 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.
- 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.
- 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.
- 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
9 within 180 nm since 2010 · 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.
- Seismic survey in progress until 161200Z sep by M/V polarcus alima towing 12 8100 meter long cables in area…2014-09-13
- Seismic survey in progress until 31 jan 12 by M/V oceanic endeavour towing 12 9500 meter long cables in area…2011-11-28
- Cable operations in progress until 25 oct by cableship ile de sein along trackline joining 08-27.38N…2011-10-10
- Seismic survey in progress until further notice by M/V geo caribbean towing 12 five mile long cables in area…2011-09-27
- Cable operations in progress until 08 oct by cableship ile de sein along trackline joining 09-33.29N…2011-09-27
- Seismic survey in progress until further notice by M/V geo caribbean towing 12 4.5 mile long long cables in…2011-07-21
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 2026-09-24 23:25Z; 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.