Exercises

Hazardous operations

Arabian Sea · HYDROPAC 479/16

What this record establishes

Archived notice · 2016-02-25 08:30Z

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 125/16 191005Z FEB 16 - COMCOGARD SECTOR GUAM 200735Z FEB 16.. Issued 2016-02-20 10:50Z. 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
Arabian Sea. The parsed report position is 22.467, 69.083 with a 12.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the Arabian Sea →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2016-02-25 05:30Z2016-02-25 07:30Z—2 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued
2016-02-20 10:50Z
status
Archived notice
self-cancels
2016-02-25 08:30Z
authority
NAVAREA VIII 125/16 191005Z FEB 16 - COMCOGARD SECTOR GUAM 200735Z FEB 16.
NAVAREA
NAVAREA VIII · named as the source of this relay
sea
Arabian Sea
position
22.467, 69.083 · r 12.0 nm
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

INDIA-WEST COAST.
GULF OF KACHCHH.
HAZARDOUS OPERATIONS.
DNC 03.
1. HAZARDOUS OPERATIONS 250530Z TO 250730Z FEB
   WITHIN 12 MILES OF 22-28.04N 069-04.99E
   BETWEEN 300 DEGREES AND 020 DEGREES.
2. CANCEL HYDROPAC 456/16(81,92).
3. CANCEL THIS MSG 250830Z FEB 16.

Reading this warning

Hazardous operations
NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
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.
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.
Within a radius of
A circular area — every position within a stated distance of a point.
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.
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 · military exercises

649 within 180 nm since 2001 · 15 in the last 12 months · 1 listed in force now

01
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

Worldwide in the collected sources

28 military exercises listed in force · see all

Record snapshot 2026-10-02 00:52Z; source collection times vary.

Exercises

Gunnery, firing and naval exercise areas. All current military exercises →

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.