Exercises

Hazardous operations 291230Z to 292030Z nov, alternate 1230Z to 2030Z daily 30 nov and 01 dec in area bound…

North Pacific Ocean · NAVAREA XII 908/22

What this record establishes

Archived notice · 2022-11-29 16:49Z

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) · SEA RANGE OTC 171958Z NOV 22.. Issued 2022-11-24 10:30Z. 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 · 1 in this warning

opens (UTC)closes (UTC)locallength
2022-11-29 12:30Z2022-11-29 20:30Z—8 h

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

issued
2022-11-24 10:30Z
status
Archived notice
self-cancels
2022-12-01 21:30Z
authority
SEA RANGE OTC 171958Z NOV 22.
NAVAREA
NAVAREA XII
issued by
SEA RANGE OTC
sea
North Pacific Ocean
position
33.401, -121.205
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS 291230Z TO 292030Z NOV,
   ALTERNATE 1230Z TO 2030Z DAILY 30 NOV AND
   01 DEC IN AREA BOUND BY
   33-20-20N 122-13-23W, 33-29-13N 121-36-22W,
   33-38-25N 120-21-11W, 33-22-33N 120-18-32W,
   33-13-22N 121-33-30W, 33-12-25N 122-11-54W.
2. CANCEL THIS MSG 012130Z DEC 22.

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.
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

1192 within 180 nm since 1999 · 35 in the last 12 months · 0 listed in force now

99
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

9 military exercises listed in force · see all

Record snapshot 2026-10-02 21:34Z; 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.