Hazardous operations 041400Z to 042100Z aug, alternate 1400Z to 2100Z daily 05 and 12 aug in areas bound by…
North Pacific Ocean · NAVAREA XII 482/23
What this record establishes
Archived notice · 2023-08-03 00:25Z
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 311701Z JUL 23.. Issued 2023-07-31 18:54Z. 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 482/23 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 |
|---|---|---|---|
| 2023-08-04 14:00Z | 2023-08-04 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
- 2023-07-31 18:54Z
- status
- Archived notice
- self-cancels
- 2023-08-12 22:00Z
- authority
- SEA RANGE OTC 0/23 311701Z JUL 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 041400Z TO 042100Z AUG, ALTERNATE 1400Z TO 2100Z DAILY 05 AND 12 AUG IN AREAS BOUND BY A. 31-17.37N 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, 32-41.90N 121-37.73W, 32-51.43N 121-21.27W, 33-10.28N 121-09.28W, 33-16.10N 121-10.50W, 33-30.37N 121-29.48W, 33-34.50N 121-49.02W, 33-39.28N 122-52.00W, 33-40.70N 124-13.83W, 33-27.60N 126-34.97W, 32-38.58N 128-57.57W, 31-52.28N 130-11.08W. B. 28-54.07N 135-55.68W, 30-29.53N 136-30.62W, 31-13.03N 133-47.48W, 29-36.88N 133-14.93W. C. 26-19.10N 141-47.67W, 27-26.70N 142-21.68W, 28-26.27N 139-49.92W, 27-18.03N 139-17.13W. 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
32 military exercises listed in force · see all
Record snapshot 2026-09-26 20:01Z; 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.