Exercises

Hazardous operations are scheduled off California in the North Pacific from 1330 to 2030 UTC daily on 28 and 29 September.

North Pacific Ocean · NAVAREA XII 660/26

What this record establishes

Listed in force

The latest collected record lists this warning as active. This is the status of the notice, not a live observation of conditions at the location.

Source and dates: NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-09-24 20:53Z. First collected 2026-09-25 18:32Z; last seen in collection 2026-09-25 21:32Z. 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.

Current notices and reporting history in the North Pacific Ocean →

issued: 2026-09-24 20:53Z
status: Listed in force
self-cancels: 2026-09-29 21:30Z
NAVAREA: NAVAREA XII
sea: North Pacific Ocean
position: 34.439, -122.307
nearest port: Monterey · 132 nm
source: NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-09-25 18:32Z

Original warning text

NORTH PACIFIC.
CALIFORNIA.
1. HAZARDOUS OPERATIONS 1330Z TO 2030Z
   DAILY 28 AND 29 SEP IN AREA BOUND BY
   35-04.00N 122-39.00W, 34-45.00N 123-29.00W,
   33-31.00N 122-41.00W, 33-49.00N 121-50.00W,
   34-49.00N 121-09.00W, 35-04.00N 121-19.00W.
2. CANCEL THIS MSG 292130Z SEP 26.

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 →

Conditions at the position · now

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MET Norway · NOAA WaveWatch III · HYCOM · GEBCO 2020 · model data at the centroid, not an observation

Collected reports in this area · military exercises

817 within 180 nm since 1999 · 14 in the last 12 months · 3 listed in force now

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

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

C22G+FM morro bay, ca, USASpills · 87.4 nm
Hazardous operations 1300Z to 2300Z daily 28 and 30 sep in areas bound by: a. 33-41.00N 119-39.00W,…Exercises · 110.6 nm

Worldwide in the collected sources

30 military exercises listed in force · see all

Record snapshot 2026-09-25 21:45Z; 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.