Seismic survey in progress until further notice by M/V ramform valiant and M/V nordic explorer towing 12…
South Atlantic Ocean · HYDROLANT 879/13
What this record establishes
Archived notice · 2013-06-07 09:43Z
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 110/13 080652Z APR 13.. Issued 2013-04-08 11:52Z. 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
- Cancel HYDROLANT 879/13 and 1172/13later cancellation notice
Current notices and reporting history in the South Atlantic Ocean →
- issued
- 2013-04-08 11:52Z
- status
- Archived notice
- authority
- NAVAREA VII 110/13 080652Z APR 13.
- NAVAREA
- NAVAREA VII · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -31.835, 15.574
- vessels
- M/V NORDIC EXPLORER · 92 messagesM/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. SOUTH AFRICA. SEISMIC SURVEY IN PROGRESS UNTIL FURTHER NOTICE BY M/V RAMFORM VALIANT AND M/V NORDIC EXPLORER TOWING 12 8700 METER LONG CABLES IN AREA BOUND BY 31-15.7S 014-43.8E, 30-57.3S 015-15.8E, 32-24.1S 016-25.1E, 32-42.9S 015-52.9E. 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
14 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 further notice by cableship ile de sein in 32-07.00S 013-53.00E2022-09-06
- Cable operations 24 jul thru 09 aug by cableship ile de sein in area bound by 32-10.70S 013-58.40E,…2022-07-19
- Cable operations 19 jun until further notice by cableship leon thevenin in area bound by 33-42.70S…2022-06-17
- Survey operations in progress until 21 feb by M/V bgp pioneer and M/V aquarius towing seven mile long…2021-02-05
- Survey operations in progress until 21 feb by M/V bgp pioneer and M/V aquarius towing seven mile long…2021-02-04
- Survey operations in progress until 16 feb by M/V bgp pioneer and M/V aquarius towing six mile long seismic…2021-01-25
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
23 cable & pipeline work listed in force · see all
Record snapshot 2026-09-24 23:46Z; 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.