Seismic survey 24 thru 31 dec by M/V bgp challenger towing 12000 meter long cable in area bound by 27-09.77S…
South Atlantic Ocean · HYDROLANT 3471/16
What this record establishes
Archived notice · 2017-01-01 00:01Z
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 COASTAL 1102/16 221943Z DEC 16.. Issued 2016-12-22 19:50Z. 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
- 2016-12-22 19:50Z
- status
- Archived notice
- authority
- NAVAREA V COASTAL 1102/16 221943Z DEC 16.
- NAVAREA
- NAVAREA V · named as the source of this relay
- issued by
- NAVAREA V COASTAL
- sea
- South Atlantic Ocean
- position
- -26.460, -42.875
- 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-SOUTH COAST. DNC 01. 1. SEISMIC SURVEY 24 THRU 31 DEC BY M/V BGP CHALLENGER TOWING 12000 METER LONG CABLE IN AREA BOUND BY 27-09.77S 044-05.55W, 27-39.02S 043-18.52W, 25-56.50S 041-45.62W, 25-08.88S 042-20.00W. 2. CANCEL THIS MSG 01 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.
- 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
1735 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 by cableship rebecca: a. 191000Z to 252359Z jan along trackline joining 14-49.32S…2024-01-15
- Cable operations in progress thru 03 jan 24 by M/V puerto real in area bound by 24-31.30S 042-12.30W,…2023-06-23
- Seismic survey in progress until 09 oct by M/V sw diamond towing nine 225 meter long cables in area bound by…2022-10-07
- Underwater operations in progress until 142359Z aug by cableship ile de brehat in: a. 24-03.0S 046-31.4W2017-07-14
- Underwater operations in progress until 132300Z jul by cableship ile de brehat in: a. 24-03.8S 046-29.2W2017-06-15
- Seismic survey 21 thru 28 jan by M/V polarcus adira towing 9000 meter long cable in area bound by 25-06S…2017-01-19
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
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-01 10:55Z; 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.