Seismic survey in progress until 14 jun by M/V ramform valiant towing ten 9000 meter long cables in area…
South Atlantic Ocean · HYDROLANT 959/11
What this record establishes
Archived notice · 2011-06-13 06:37Z
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 V E 485/11 09 JUN 11.. Issued 2011-06-09 07:33Z. 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
- Cancel HYDROLANT 959/11 and this msglater cancellation notice
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2011-06-09 07:33Z
- status
- Archived notice
- authority
- NAVAREA V E 485/11 09 JUN 11.
- NAVAREA
- NAVAREA V · named as the source of this relay
- issued by
- NAVAREA V E
- sea
- South Atlantic Ocean
- position
- -15.108, -38.318
- vessel
- M/V RAMFORM VALIANT · 344 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BRAZIL-EAST COAST. 1. SEISMIC SURVEY IN PROGRESS UNTIL 14 JUN BY M/V RAMFORM VALIANT TOWING TEN 9000 METER LONG CABLES IN AREA BOUND BY 14-37.83S 038-46.97W, 14-34.63S 037-57.30W, 15-38.10S 037-52.38W, 15-40.90S 038-32.43W, 15-14.20S 038-41.20W, 15-12.78S 038-42.63W, 15-09.28S 038-44.72W, 14-53.83S 038-49.45W. SIX MILE BERTH REQUESTED. 2. CANCEL THIS MSG 15 JUN.
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.
- 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
227 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 repair operations 23 feb thru 25 mar by M/V teneo vicinity of trackline joining 13-00.42S 038-27.59W,…2015-02-23
- Seismic survey in progress until 10 aug by M/V ocean endeavour towing 12 five mile long cables in area bound…2014-02-25
- Cable laying operations 14 thru 24 feb by cableship ile de batz along trackline between 13-00.81S 038-27.13W…2013-02-13
- Seismic survey in progress until 24 oct by M/V harrier explorer towing 6.5 mile long cables in area bound by…2012-10-22
- Seismic survey 17 thru 21 oct by M/V harrier explorer towing 6.5 mile long cables in area bound by 13-34.6S…2012-10-18
- Seismic survey 14 thru 16 oct by M/V harrier explorer towing 6.5 mile long cables in area bound by 13-34.6S…2012-10-13
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 23:29Z; 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.