Survey operations in progress until further notice by M/V ramform valiant towing ten cables in area bound by…
South Atlantic Ocean · HYDROLANT 455/12
What this record establishes
Archived notice · 2012-03-22 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 VII 58/12 291000Z FEB 12.. Issued 2012-02-29 20:24Z. 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
- 2012-02-29 20:24Z
- status
- Archived notice
- authority
- NAVAREA VII 58/12 291000Z FEB 12.
- NAVAREA
- NAVAREA VII · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -11.739, 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. 1. SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V RAMFORM VALIANT TOWING TEN CABLES IN AREA BOUND BY 10-48.8S 012-43.2E, 12-47.6S 012-43.2E, 12-48.1S 012-23.1E, 10-49.8S 012-12.1E. EIGHT MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 2263/11.
Reading this warning
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- 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 · survey operations
12 within 180 nm since 2011 · 2 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.
- NAVAREA VII 258 of 2026 : (15 sep 26) 1. south atlantic ocean - ne sector 2. angola, namibia 3. charts san…2026-09-15
- NAVAREA VII 250 of 2026: (31 aug 26) 1. south atlantic ocean - ne sector 2. angola, namibia 3. charts san 1,…2026-08-31
- Survey operations in progress until further notice by M/V ramform tethys towing 8025 meter long cable in…2021-07-29
- Survey operations in progress until further notice by M/V ramform tethys towing 8025 meter long cables in…2021-07-26
- Survey operations in progress until further notice by M/V ramform vanguard towing ten 8025 meter long cables…2020-02-24
- Survey operations in progress until further notice by M/V ramform sovereign towing 9000 meter long cables in…2019-02-04
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
56 survey operations listed in force · see all
Record snapshot 2026-10-01 23:55Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.