Seismic survey in progress until 21 nov by M/V ramform explorer towing eight 6853 meter long cables in area…
South Atlantic Ocean · HYDROLANT 2576/02
What this record establishes
Archived notice · 2002-11-22 00:00Z
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 1491/02 211231Z NOV 02; PTNM. Issued 2002-11-21 16:40Z. 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
- 200 meter long pipe adrift vicinity 47-03N 005-00W at 201650Z novcancelled by this notice
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2002-11-21 16:40Z
- status
- Archived notice
- authority
- NAVAREA V 1491/02 211231Z NOV 02; PTNM
- NAVAREA
- NAVAREA V · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -0.538, -43.968
- vessel
- M/V RAMFORM EXPLORER · 297 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. SEISMIC SURVEY IN PROGRESS UNTIL 21 NOV BY M/V RAMFORM EXPLORER TOWING EIGHT 6853 METER LONG CABLES IN AREA BOUND BY 00-43.06S 044-19.08W, 00-45.23S 044-17.07W, 00-49.04S 044-07.55W, 00-22.43S 043-38.20W, 00-15.56S 043-44.04W, 00-14.13S 043-46.41W. FIVE MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 2571/02(37), 2573/02(37) REFERS. 3. CANCEL THIS MSG 22 NOV.
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.
- 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.
- 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
236 within 180 nm since 1999 · 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.
- Underwater operations 1000Z to 2000Z daily until 13 sep by cableship ile d' yeu along trackline joining…2026-08-14
- Underwater operations 1000Z to 2000Z daily until 13 sep by cableship ile d' yeu along trackline joining…2026-08-14
- Seismic survey in progress until 05 jun by M/V polarcus alima towing 12 8100 meter long cables in area bound…2016-05-10
- Seismic survey in progress until 10 nov by M/V nps oceanic atalwart towing 5.4 mile long cable in area bound…2014-10-11
- Seismic survey in progress until 30 apr by M/V boa galatea towing 5.4 mile long cables in area bound by…2013-04-06
- Seismic survey in progress until 30 apr by M/V boa galatea towing 5.4 mile long cables in area bound by…2013-04-04
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
Worldwide in the collected sources
23 cable & pipeline work listed in force · see all
Record snapshot 2026-10-03 07:08Z; 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.