Exercises

Hazardous operations 01 and 02 nov: a. 0631Z to 1335Z in area bound by 34-40.00N 121-25.00W, 34-40.00N…

North Pacific Ocean · NAVAREA XII 749/23

What this record establishes

Archived notice · 2023-11-02 15:31Z

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) · WESTERN RANGE 0/23 181704Z OCT 23.. Issued 2023-10-26 09:36Z. 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 →

issued
2023-10-26 09:36Z
status
Archived notice
self-cancels
2023-11-02 15:31Z
authority
WESTERN RANGE 0/23 181704Z OCT 23.
NAVAREA
NAVAREA XII
issued by
WESTERN RANGE
sea
North Pacific Ocean
position
34.633, -123.292
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 01 AND 02 NOV:
   A. 0631Z TO 1335Z IN AREA BOUND BY
      34-40.00N 121-25.00W, 34-40.00N 120-54.00W,
      34-46.00N 120-37.00W, 34-57.00N 120-37.00W,
      34-58.00N 120-58.00W, 34-58.00N 121-24.00W.
   B. 0631Z TO 1340Z IN AREA BOUND BY
      34-19.00N 124-36.00W, 34-40.00N 124-39.00W,
      34-56.00N 121-59.00W, 34-36.00N 121-56.00W.
   C. 0631Z TO 1347Z IN AREA BOUND BY
      32-30.00N 137-13.00W, 32-48.00N 137-18.00W,
      33-04.00N 136-01.00W, 32-45.00N 135-56.00W.
   D. 0631Z TO 1431Z IN AREA BOUND BY
      14-36.00N 175-34.00E, 14-54.00N 175-13.00E,
      14-35.00N 174-55.00E, 14-23.00N 174-49.00E,
      14-17.00N 174-54.00E, 14-17.00N 175-15.00E.
2. CANCEL THIS MSG 021531Z NOV 23.

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.
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.
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

573 within 180 nm since 1999 · 11 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 22:58Z; 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.