Hazardous operations 121400Z to 122100Z aug in areas bound by: a. 32-41.90N 121-37.73W, 32-51.43N…
North Pacific Ocean · NAVAREA XII 507/23
What this record establishes
Archived notice · 2023-08-11 17:19Z
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 0/23 080702Z AUG 23.. Issued 2023-08-08 07:19Z. 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
- Cancel NAVAREA XII 507/23 and this msglater cancellation notice
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2023-08-12 14:00Z | 2023-08-12 21:00Z | — | 7 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2023-08-08 07:19Z
- status
- Archived notice
- self-cancels
- 2023-08-12 22:00Z
- authority
- SEA RANGE OTC 0/23 080702Z AUG 23.
- NAVAREA
- NAVAREA XII
- issued by
- SEA RANGE OTC
- sea
- North Pacific Ocean
- position
- 32.476, -125.693
- 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 121400Z TO 122100Z AUG
IN AREAS BOUND BY:
A. 32-41.90N 121-37.73W, 32-51.43N 121-21.26W,
33-10.28N 121-09.28W, 33-16.10N 121-10.50W,
33-30.37N 121-29.48W, 33-34.50N 121-49.01W,
33-39.28N 122-52.00W, 33-40.70N 124-13.84W,
33-27.60N 126-34.97W, 32-38.59N 128-57.56W,
31-52.28N 130-11.08W, 31-17.36N 130-00.53W,
31-03.07N 128-33.52W, 31-14.83N 125-59.70W,
31-51.30N 123-47.55W, 32-18.53N 122-33.77W.
B. 31-13.03N 133-47.48W, 30-29.53N 136-30.62W,
28-54.07N 135-55.69W, 29-36.88N 133-14.93W.
C. 28-26.27N 139-49.91W, 27-26.70N 142-21.68W,
26-19.10N 141-47.66W, 27-18.04N 139-17.14W.
2. CANCEL THIS MSG 122200Z AUG 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.
- 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.
Collected reports in this area · military exercises
129 within 180 nm since 1999 · 1 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.
- Hazardous operations 190900Z to 192100Z aug, alternate 0900Z to 2100Z daily 20 and 21 aug in areas bound by:…2026-08-17
- Hazardous operations 251400Z to 260030Z apr, alternate 261400Z to 270030Z and 291400Z to 300030Z apr in area…2024-04-23
- Hazardous operations 082030Z to 090030Z mar in area within 30 miles of 33-32.50N 122-23.50W2024-03-03
- Hazardous operations 041200Z to 042030Z nov, alternate 1300Z to 2130Z daily 07 and 13 nov in areas bound by:…2023-10-30
- Hazardous operations 01 and 02 nov: a. 0631Z to 1335Z in area bound by 34-40.00N 121-25.00W, 34-40.00N…2023-10-26
- Hazardous operations 01 and 02 nov: a. 0631Z to 1335Z in area bound by 34-40.00N 121-25.00W, 34-40.00N…2023-10-26
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
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 22:14Z; 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.