Seismic survey 19 thru 27 jan by M/V bgp challenger towing 10000 meter long cable in area bound by 04-09S…
South Atlantic Ocean · HYDROLANT 183/17
What this record establishes
Archived notice · 2017-01-19 21:20Z
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 17/17 182212Z JAN 17.. Issued 2017-01-18 23:22Z. 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
- 2017-01-18 23:22Z
- status
- Archived notice
- authority
- NAVAREA V 17/17 182212Z JAN 17.
- NAVAREA
- NAVAREA V · named as the source of this relay
- sea
- South Atlantic Ocean
- position
- -4.420, -34.904
- vessel
- M/V BGP CHALLENGER · 82 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH ATLANTIC. BRAZIL-NORTHEAST COAST. DNC 01. 1. SEISMIC SURVEY 19 THRU 27 JAN BY M/V BGP CHALLENGER TOWING 10000 METER LONG CABLE IN AREA BOUND BY 04-09S 034-46W, 04-13S 035-39W, 04-45S 035-03W, 04-45S 034-40W, 04-44S 034-33W, 04-38S 034-29W, 04-15S 034-21W, 04-11S 034-22W, 04-10S 034-32W. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 106/17. 3. CANCEL THIS MSG 28 JAN 17.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- 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
179 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
- Underwater operations 1000Z to 2000Z daily 10 may thru 20 sep by cableship recorder and M/V saga badejo in…2018-08-10
- Underwater operations 1000Z to 2000Z daily 10 may thru 09 aug by cableship recorder and M/V saga badejo in…2018-05-10
- Underwater operations 1000Z to 2000Z daily 20 feb thru 06 may by cableship rene descartes along trackline…2018-04-20
- Underwater operations in progress 1000Z to 2000Z daily until 29 may by cableship rene descartes along…2018-03-24
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
- Odas buoy established in 05-09.46S 035-09.81WNav aids · 46.9 nm
- Odas buoy bravo rn-l temporarily established until 20 oct in 04-53.00S 035-46.01WNav aids · 58.6 nm
Worldwide in the collected sources
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 04:29Z; 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.