Seismic survey in progress until 270300Z dec by M/V ramform viking towing eight 6000 meter long cables in…
South Atlantic Ocean · HYDROLANT 2378/03
What this record establishes
Archived notice · 2003-12-24 10:40Z
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 1446, 1447/03 230358Z DEC 03. Issued 2003-12-23 07:20Z. 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
- Man overboard vicinity 05-53.42S 035-01.25W at 060630Z deccancelled by this notice
- Dangerous wreck in 36-15.68S 056-01.46Wlater cancellation notice
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2003-12-23 07:20Z
- status
- Archived notice
- self-cancels
- 2003-12-27 04:00Z
- authority
- NAVAREA V 1446, 1447/03 230358Z DEC 03
- NAVAREA
- NAVAREA V · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -3.060, -38.522
- vessel
- M/V RAMFORM VIKING · 198 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 270300Z DEC BY M/V RAMFORM VIKING TOWING EIGHT 6000 METER LONG CABLES IN AREA BOUND BY 02-50S 038-27W, 02-53S 038-23W, 03-16S 038-34W, 03-13S 038-40W. FIVE MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 2279/03. 3. CANCEL THIS MSG 270400Z DEC.
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.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
- 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
355 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 operations in progress until 130259Z feb 21 by cableship ile de brehat and cableship peter faber along…2020-12-30
- Cable operations 300300Z nov to 130259Z feb 21 by cableship ile de brehat along trackline joining 03-44.36S…2020-11-29
- Seismic survey in progress until 26 feb by M/V ramform atlas towing 14 9000 meter long cables in area bound…2016-01-15
- Seismic survey in progress until 10 feb 16 by M/V ramform atlas towing 14 9000 meter long cables in area…2015-10-10
- Seismic survey in progress until 10 feb 16 by M/V ramform atlas towing 14 1400 meter long cables in area…2015-09-16
- Seismic survey in progress until 10 feb 16 by M/V ramform atlas towing 14 9000 meter long cables in area…2015-09-10
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 09:21Z; 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.