Exercises

Hazardous operations 260900Z to 270600Z aug and 271100Z to 280500Z aug in area bound by 53-16.0N 160-00.0E,…

North Pacific Ocean · HYDROPAC 1439/03

What this record establishes

Archived notice · 2003-08-28 06:00Z

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 XIII 28/03 21 AUG 03; AUSCOAST 220353Z AUG 03. Issued 2003-08-22 06:00Z. 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
North Pacific Ocean. 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 North Pacific Ocean →

Activity windows · 2 in this warning

opens (UTC)closes (UTC)locallength
2003-08-26 09:00Z2003-08-27 06:00Z—21 h
2003-08-27 11:00Z2003-08-28 05:00Z—18 h

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

issued
2003-08-22 06:00Z
status
Archived notice
self-cancels
2003-08-28 06:00Z
authority
NAVAREA XIII 28/03 21 AUG 03; AUSCOAST 220353Z AUG 03
NAVAREA
NAVAREA XIII · named as the source of this relay
sea
North Pacific Ocean
position
52.189, 161.423
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HAZARDOUS OPERATIONS 260900Z TO 270600Z AUG AND
   271100Z TO 280500Z AUG IN AREA BOUND BY
   53-16.0N 160-00.0E, 53-37.0N 163-32.2E,
   51-42.0N 164-26.4E, 50-48.5N 161-25.5E,
   51-33.3N 157-46.2E.
2. CANCEL HYDROPAC 1438/03(74), STATION RESTORED.
3. CANCEL THIS MSG 280600Z AUG.

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.
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.
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.
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

64 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
15
20
22

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

9 military exercises listed in force · see all

Record snapshot 2026-10-03 19:14Z; 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.