Exercises

Hazardous operations 082000Z to 090130Z may in area bound by 34-39.78N 121-13.13W, 34-23.72N 121-02.12W,…

North Pacific Ocean · NAVAREA XII 305/24

What this record establishes

Archived notice · 2024-05-09 02:30Z

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 0/24 012200Z MAY 24.. Issued 2024-05-03 04:40Z. 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.

Current notices and reporting history in the North Pacific Ocean →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2024-05-08 20:00Z	2024-05-09 01:30Z	—	5 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: 2024-05-03 04:40Z
status: Archived notice
self-cancels: 2024-05-09 02:30Z
authority: SEA RANGE OTC 0/24 012200Z MAY 24.
NAVAREA: NAVAREA XII
issued by: SEA RANGE OTC
sea: North Pacific Ocean
position: 34.133, -122.018
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 082000Z TO 090130Z MAY
   IN AREA BOUND BY
   34-39.78N 121-13.13W, 34-23.72N 121-02.12W,
   34-02.52N 121-26.45W, 33-30.93N 121-51.00W,
   33-24.12N 122-08.68W, 33-48.35N 122-37.67W,
   34-29.08N 122-52.25W, 34-35.42N 122-30.08W,
   34-33.17N 121-39.20W.
2. CANCEL THIS MSG 090230Z MAY 24.

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

897 within 180 nm since 1999 · 17 in the last 12 months · 0 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 · 92 nm

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.