Hazardous operations 251400Z to 260030Z apr, alternate 261400Z to 270030Z and 291400Z to 300030Z apr in area…
North Pacific Ocean · NAVAREA XII 275/24
What this record establishes
Archived notice · 2024-04-30 01:30Z
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 232245Z APR 24.. Issued 2024-04-23 22:47Z. 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 · 3 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2024-04-25 14:00Z | 2024-04-26 00:30Z | — | 10 h 30 |
| 2024-04-26 14:00Z | 2024-04-27 00:30Z | — | 10 h 30 |
| 2024-04-29 14:00Z | 2024-04-30 00:30Z | — | 10 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
- 2024-04-23 22:47Z
- status
- Archived notice
- self-cancels
- 2024-04-30 01:30Z
- authority
- SEA RANGE OTC 0/24 232245Z APR 24.
- NAVAREA
- NAVAREA XII
- issued by
- SEA RANGE OTC
- sea
- North Pacific Ocean
- position
- 33.886, -123.260
- 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 251400Z TO 260030Z APR, ALTERNATE 261400Z TO 270030Z AND 291400Z TO 300030Z APR IN AREA BOUND BY 33-11.10N 121-15.56W, 32-13.68N 122-24.80W, 34-34.35N 125-15.21W, 35-33.10N 124-06.45W. 2. CANCEL THIS MSG 300130Z APR 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.
Collected reports in this area · military exercises
714 within 180 nm since 1999 · 13 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 1300Z to 2300Z daily 28 and 30 sep in areas bound by: a. 33-41.00N 119-39.00W,…2026-09-24
- Hazardous operations 1330Z to 2030Z daily 28 and 29 sep in area bound by 35-04.00N 122-39.00W, 34-45.00N…2026-09-24
- Hazardous operations 292000Z to 300230Z sep in area bound by 33-32.00N 120-21.00W, 32-45.00N 120-53.00W,…2026-09-24
- Hazardous operations 261500Z to 270100Z sep in area bound by 34-01.00N 121-02.00W, 33-21.00N 119-28.00W,…2026-09-21
- Hazardous operations 1500Z to 0100Z daily 17 and 18 sep in area within 15 miles of 33-01.00N 120-53.00W2026-09-16
- Hazardous operations 092000Z to 100200Z sep in area bound by 33-32.00N 120-21.00W, 32-45.00N 120-53.00W,…2026-09-08
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 22:58Z; 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.