Seismic survey in progress until 311830Z aug by M/V brahmaputra dolphin, M/V KOHINOOR-1 and M/V ganesh each…
Bay of Bengal · HYDROPAC 236/17
What this record establishes
Archived notice · 2017-04-07 12:33Z
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 VIII 55/17 211145Z JAN 17.. Issued 2017-01-21 12:31Z. 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
- Bay of Bengal. 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 HYDROPAC 236/17, 735/17, 904/17, 929/17, 1013/17, 1223/17 and this msglater cancellation notice
Current notices and reporting history in the Bay of Bengal →
- issued
- 2017-01-21 12:31Z
- status
- Archived notice
- self-cancels
- 2017-08-31 19:30Z
- authority
- NAVAREA VIII 55/17 211145Z JAN 17.
- NAVAREA
- NAVAREA VIII · named as the source of this relay
- sea
- Bay of Bengal
- position
- 16.333, 81.900
- vessels
- M/V BRAHMAPUTRA DOLPHIN · 5 messagesM/V GANESH EACH · 2 messagesM/V KOHINOOR-1 · 7 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BAY OF BENGAL. INDIA. DNC 03. 1. SEISMIC SURVEY IN PROGRESS UNTIL 311830Z AUG BY M/V BRAHMAPUTRA DOLPHIN, M/V KOHINOOR-1 AND M/V GANESH EACH TOWING 4 16000 METER LONG CABLES IN AREA BOUND BY 16-20.71N 081-39.09E, 16-19.80N 081-43.67E, 16-22.80N 081-50.41E, 16-24.34N 081-56.82E, 16-29.27N 082-06.86E, 16-26.13N 082-04.32E, 16-21.74N 082-06.78E, 16-19.97N 082-06.79E, 16-18.63N 082-04.50E, 16-16.07N 081-56.78E, 16-14.28N 081-49.47E, 16-14.92N 081-48.88E, 16-15.21N 081-47.87E, 16-15.23N 081-39.07E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 311930Z AUG 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.
- 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.
- 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
117 within 180 nm since 2001 · 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.
- Pipeline operations in progress until 28 mar by M/V miclyn endurance with submersible in area bound by…2018-03-07
- Pipeline operations in progress until 19 mar by M/V miclyn endurance with submersible in area bound by…2018-02-28
- Seismic survey in progress until 311830Z oct by M/V brahmaputra dolphin, M/V KOHINOOR-1 and M/V ganesh each…2017-09-04
- Seismic survey in progress until 201830Z jan by M/V polar duchess in area bound by 16-27.47N 082-16.96E,…2016-12-28
- Seismic survey in progress until 271830Z oct by M/V samudra kaustubh in area bound by 17-35.93N 083-16.15E,…2016-10-17
- Seismic survey 01 aug thru 31 dec by M/V brahmaputra, M/V dolphin, M/V kohinoor I and M/V ganesh towing four…2016-07-30
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
25 cable & pipeline work listed in force · see all
Record snapshot 2026-09-30 07:11Z; 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.