Survey operations in progress until 311830Z dec by M/V eagle explorer towing 12000 meter long cable in area…
Bay of Bengal · HYDROPAC 2440/21
What this record establishes
Archived notice · 2021-11-29 15:02Z
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 614/21 262205Z AUG 21.. Issued 2021-08-26 22:07Z. 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
- 2021-08-26 22:07Z
- status
- Archived notice
- self-cancels
- 2021-12-31 19:30Z
- authority
- NAVAREA VIII 614/21 262205Z AUG 21.
- NAVAREA
- NAVAREA VIII · named as the source of this relay
- sea
- Bay of Bengal
- position
- 10.108, 90.839
- 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. ANDAMAN SEA. ANDAMAN ISLANDS. DNC 03. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 311830Z DEC BY M/V EAGLE EXPLORER TOWING 12000 METER LONG CABLE IN AREA BOUND BY 11-14.04N 088-40.01E, 11-15.14N 093-01.73E, 08-57.97N 092-58.46E, 08-58.28N 088-40.16E. EIGHT MILE BERTH REQUESTED. 2. CANCEL THIS MSG 311930Z DEC 21.
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.
- 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 · survey operations
23 within 180 nm since 2008 · 1 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 10 thru 19 apr in area bound by 11-29.73N 092-35.88E, 11-29.73N 092-38.17E, 11-31.52N…2026-04-06
- 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 by M/V responder: a. 20 thru 22 feb in area bound by 09-37.13N 092-52.62E, 09-37.69N…2023-02-17
- Survey operations 27 dec thru 26 jan 23 by M/V amazon warrior towing 10000 meter long cable in area bound by…2022-12-26
- Survey operations 29 nov thru 01 dec by M/V eagle explorer towing 10,000 meter long cable in area bound by…2022-11-28
- Survey operations by M/V northern endeavour: a. 15 and 16 may in area bound by 09-39.62N 091-53.26E,…2022-05-13
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
56 survey operations listed in force · see all
Record snapshot 2026-10-02 01:28Z; 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.