Seismic survey in progress until further notice by M/V ramform valiant towing ten cables in area bound by…
South Atlantic Ocean · HYDROLANT 2263/11
What this record establishes
Archived notice · 2012-02-29 20:24Z
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 VII 248/11 280750Z DEC 11.. Issued 2011-12-28 10:32Z. 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
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2011-12-28 10:32Z
- status
- Archived notice
- authority
- NAVAREA VII 248/11 280750Z DEC 11.
- NAVAREA
- NAVAREA VII · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -11.743, 12.503
- 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
EASTERN SOUTH ATLANTIC. ANGOLA. SEISMIC SURVEY IN PROGRESS UNTIL FURTHER NOTICE BY M/V RAMFORM VALIANT TOWING TEN CABLES IN AREA BOUND BY 10-49.8S 012-43.2E, 12-47.6S 012-43.2E, 12-48.1S 012-23.1E, 10-49.8S 012-12.1E. SIX MILE BERTH REQUESTED.
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.
- 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.
Collected reports in this area · cable & pipeline work
13 within 180 nm since 2001 · 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.
- Survey operations 211200Z to 251200Z may by cableship leon thevnin in areas within one mile of: a. 09-34.4S…2018-05-18
- Cable operations in progress until 30 dec by cableship rene descartes with submersible in area within two…2017-12-18
- Seismic survey in progress until further notice by M/V ramform valiant in area bound by 13-38.0S 012-32.0E,…2014-11-26
- Seismic survey in progress until further notice by M/V ramform valiant in area bound by 13-38.0S 012-32.0E,…2014-09-16
- Seismic survey in progress until further notice by M/V ramform valiant and M/V nordic explorer in area bound…2014-09-15
- Cable operations in progress until further notice by cableship peter faber along trackline between 09-32.5S…2011-07-14
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
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 00:27Z; 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.