Exercises

Hazardous operations 2130Z to 2300Z daily 21 thru 24 jun within 280 miles of 36-16N 148-11E

North Pacific Ocean · HYDROPAC 1138/09

What this record establishes

Archived notice · 2009-06-24 23:59Z

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 XI 383/09 18 JUN 09.. Issued 2009-06-18 00:52Z. 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 parsed report position is 36.267, 148.183 with a 280.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the North Pacific Ocean →

Activity windows · 4 in this warning

opens (UTC)closes (UTC)locallength
2009-06-21 21:30Z2009-06-21 23:00Z—1 h 30
2009-06-22 21:30Z2009-06-22 23:00Z—1 h 30
2009-06-23 21:30Z2009-06-23 23:00Z—1 h 30
2009-06-24 21:30Z2009-06-24 23:00Z—1 h 30

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

issued
2009-06-18 00:52Z
status
Archived notice
self-cancels
2009-06-24 23:59Z
authority
NAVAREA XI 383/09 18 JUN 09.
NAVAREA
NAVAREA XI · named as the source of this relay
sea
North Pacific Ocean
position
36.267, 148.183 · r 280.0 nm
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HAZARDOUS OPERATIONS 2130Z TO 2300Z DAILY
   21 THRU 24 JUN WITHIN 280 MILES OF
   36-16N 148-11E.
2. CANCEL THIS MSG 242359Z JUN.

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.
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.
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 · military exercises

10 within 180 nm since 2005 · 0 in the last 12 months · 0 listed in force now

05
10

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

28 military exercises listed in force · see all

Record snapshot 2026-10-02 08:52Z; 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.