Surveys

Underwater operations: a. in progress until 04 nov in area bound by 07-10.50N 079-46.00E, 07-10.50N…

Laccadive Sea · HYDROPAC 2973/22

What this record establishes

Archived notice · 2023-05-19 11:37Z

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 805/22 222213Z OCT 22.. Issued 2022-10-22 22:59Z. 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
Laccadive Sea. 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 Laccadive Sea →

issued
2022-10-22 22:59Z
status
Archived notice
self-cancels
2023-05-31 00:01Z
authority
NAVAREA VIII 805/22 222213Z OCT 22.
NAVAREA
NAVAREA VIII · named as the source of this relay
sea
Laccadive Sea
position
7.133, 79.739
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

NORTHERN INDIAN OCEAN.
SRI LANKA.
DNC 03.
1. UNDERWATER OPERATIONS:
   A. IN PROGRESS UNTIL 04 NOV IN AREA BOUND BY
      07-10.50N 079-46.00E, 07-10.50N 079-42.00E,
      07-06.52N 079-42.50E, 07-06.25N 079-46.50E.
   B. 05 NOV THRU 30 MAY 23 IN AREA BOUND BY
      06-56.57N 079-47.79E, 06-56.57N 079-46.07E,
      06-56.02N 079-46.70E, 06-56.02N 079-47.24E.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 310001Z MAY 23.

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.
Underwater operations
Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
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.
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.

All warning terms →

Collected reports in this area · survey operations

41 within 180 nm since 2006 · 3 in the last 12 months · 0 listed in force now

06
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

55 survey operations listed in force · see all

Record snapshot 2026-09-30 11:11Z; 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.