Survey operations in progress until further notice by M/V wg amundsen towing ten 2600 meter long cables in…
South Atlantic Ocean · HYDROLANT 3024/12
What this record establishes
Archived notice · 2012-12-28 10:30Z
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 310/12 230947Z DEC 12 - NAVAREA II 402/12 230920Z DEC 12 - NAVAREA III 546/12 230731Z DEC 12.. Issued 2012-12-23 10:28Z. 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
- Cable operations 130800Z to 232359Z dec by cableship ile de brehat in area between 35-55.0N 35-52.0N and…cancelled by this notice
- Seismic survey in progress until further notice by M/V nordic explorer towing 10000 meter long cable in area…cancelled by this notice
- Survey operations in progress until further notice by M/V wg amundsen towing ten 3000 meter long cables in…later cancellation notice
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2012-12-23 10:28Z
- status
- Archived notice
- authority
- NAVAREA VII 310/12 230947Z DEC 12 - NAVAREA II 402/12 230920Z DEC 12 - NAVAREA III 546/12 230731Z DEC 12.
- NAVAREA
- NAVAREA VII · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -7.636, 11.689
- vessel
- M/V WG AMUNDSEN · 49 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 WG AMUNDSEN TOWING TEN 2600 METER LONG
CABLES IN AREAS BOUND BY:
A. 07-27.6S 011-26.9E, 07-23.3S 011-34.5E,
07-40.4S 011-44.2E, 07-44.7S 011-36.6E.
B. 07-29.0S 011-37.9E, 07-27.9S 011-40.4E,
07-30.6S 011-47.3E, 07-30.8S 011-49.1E,
07-32.0S 011-52.7E, 07-51.9S 011-50.4E,
07-50.4S 011-36.8E, 07-48.2S 011-35.8E.
FOUR MILE BERTH REQUESTED.
2. CANCEL HYDROLANT 2929/12(51), OPERATIONS COMPLETED.
3. CANCEL HYDROLANT 2992/12(54).
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
74 within 180 nm since 2003 · 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.
- Survey operations in progress until further notice by M/V ramform victory towing 12 three mile long cables…2026-08-24
- Survey operations in progress until further notice by M/V ramform victory towing 12 three mile long cables…2026-07-03
- Survey operations in progress until further notice by M/V ramform tethys towing ten two mile long cables in…2024-09-17
- Survey operations in progress until further notice by M/V sw empress towing 7000 meter long cables in area…2023-08-12
- Survey operations 30 mar until further notice by M/V ramform vanguard towing ten 8000 meter long cables in…2023-03-28
- Survey operations in progress until further notice by M/V ramform vanguard towing 14 4500 meter long cables…2023-02-27
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
Worldwide in the collected sources
54 survey operations listed in force · see all
Record snapshot 2026-09-29 03:58Z; 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.