Surveys

Survey operation in progress until 30 nov by M/V geo hindsagar in area bound by 07-05.49N 091-03.06E,…

Bay of Bengal · HYDROPAC 3461/17

What this record establishes

Archived notice · 2017-12-01 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 VIII 816/17 101002Z OCT 17.. Issued 2017-10-10 18:41Z. 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
2017-10-10 18:41Z
status
Archived notice
authority
NAVAREA VIII 816/17 101002Z OCT 17.
NAVAREA
NAVAREA VIII · named as the source of this relay
sea
Bay of Bengal
position
7.553, 93.339
vessel
M/V GEO HINDSAGAR · 29 messages
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

NORTHERN INDIAN OCEAN.
BAY OF BENGAL.
ANDAMAN SEA.
NICOBAR ISLANDS.
DNC 03.
1. SURVEY OPERATION IN PROGRESS UNTIL 30 NOV BY
   M/V GEO HINDSAGAR IN AREA BOUND BY
   07-05.49N 091-03.06E, 09-44.86N 095-45.63E,
   07-37.88N 095-11.24E, 05-33.25N 091-10.33E.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROPAC 2972/17(63,71).
3. CANCEL THIS MSG 01 DEC 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.
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.

All warning terms →

Collected reports in this area · survey operations

42 within 180 nm since 2000 · 3 in the last 12 months · 0 listed in force now

00
05
10
15
20
25
26

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.

Month of issue in the collected archive

J
F
M
A
M
J
J
A
S
O
N
D

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 2026-10-04 00:36Z; 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.