Seismic survey in progress until further notice by M/V polarcus nadia towing 9260 meter long cables in area…
South Atlantic Ocean · HYDROLANT 307/15
What this record establishes
Archived notice · 2015-02-28 04:44Z
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 32/15 060428Z FEB 15.. Issued 2015-02-06 05:42Z. 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
- South 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.
Related notices and cancellation links
- Seismic survey in progress until further notice by M/V polarcus nadia towing 9260 meter long cables in area…cancelled by this notice
- Cancel HYDROLANT 307/15 and this msg, survey completedlater cancellation notice
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2015-02-06 05:42Z
- status
- Archived notice
- authority
- NAVAREA II 32/15 060428Z FEB 15.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -1.820, 8.879
- vessel
- M/V POLARCUS NADIA · 19 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN SOUTH ATLANTIC. GABON. DNC 01. 1. SEISMIC SURVEY IN PROGRESS UNTIL FURTHER NOTICE BY M/V POLARCUS NADIA TOWING 9260 METER LONG CABLES IN AREA BOUND BY 01-48.09S 008-43.25E, 01-40.15S 008-56.00E, 01-50.30S 009-02.00E, 01-58.25S 008-50.00E. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 2854/14.
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.
- Seismic survey
- A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- 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.
Collected reports in this area · cable & pipeline work
31 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 00-28.70N…2024-02-11
- Cable operations 120001Z dec until further notice by M/V polarcus adira towing 12 six mile long cables in…2019-12-09
- Cable operations 220001Z to 272359Z sep by cableship ile de sein in vicinity of trackline joining 00-18.3N…2018-09-20
- Seismic survey in progress until further notice in area bound by 02-30.19S 008-49.10E, 02-14.29S 009-13.49E,…2017-01-03
- Seismic survey in progress until 152359Z may by M/V geo caribbean towing ten 11500 meter long cables in area…2015-05-05
- Seismic survey in progress until further notice by M/V geo caribbean towing ten 11500 meter long cables in…2015-04-30
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 2026-10-03 00:43Z; 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.