Survey operations in progress until 01 feb 22 by M/V eagle explorer towing six mile long cable in area bound…
Bay of Bengal · HYDROPAC 3786/21
What this record establishes
Archived notice · 2022-01-27 10:30Z
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 904/21 311011Z DEC 21.. Issued 2021-12-31 11:47Z. 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
Current notices and reporting history in the Bay of Bengal →
- issued
- 2021-12-31 11:47Z
- status
- Archived notice
- authority
- NAVAREA VIII 904/21 311011Z DEC 21.
- NAVAREA
- NAVAREA VIII · named as the source of this relay
- sea
- Bay of Bengal
- position
- 8.596, 91.153
- vessel
- M/V EAGLE EXPLORER · 18 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BAY OF BENGAL. NICOBAR ISLANDS. DNC 03. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 01 FEB 22 BY M/V EAGLE EXPLORER TOWING SIX MILE LONG CABLE IN AREA BOUND BY 07-55.87N 089-35.89E, 09-15.70N 089-35.89E, 09-15.70N 092-42.42E, 07-55.87N 092-42.42E. SEVEN MILE BERTH REQUESTED. 2. CANCEL HYDROPAC 3434/21. 3. CANCEL THIS MSG 02 FEB 22.
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.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- 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.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf 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 · survey operations
41 within 180 nm since 2000 · 2 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.
- Survey operations in progress until 30 sep by M/V albatross 37 in area bound by 06-22.13N 093-43.63E,…2026-09-11
- Survey operations 06 thru 14 sep by M/V albatross 37 in area bound by 06-22.13N 093-43.63E, 06-04.21N…2026-09-05
- Survey operations 05 thru 15 apr in area bound by 10-35.00N 092-48.00E, 10-42.00N 092-48.00E, 10-42.00N…2024-04-03
- Survey operations in progress until 311830Z mar in area bound by 06-51.00N 093-36.00E, 06-55.00N 093-36.00E,…2024-03-26
- Survey operations in progress until 13 jun by M/V eagle explorer towing 10000 meter long cable in vicinity…2023-05-13
- Survey operations in progress until 13 may by M/V eagle explorer towing 10000 meter long cable in vicinity…2023-05-03
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
54 survey operations listed in force · see all
Record snapshot 2026-09-29 01:51Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.