Hazardous operations
North Pacific Ocean · NAVAREA XII 386/10
What this record establishes
Archived notice · 2010-09-21 10:28Z
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) · WESTERN RANGE OP W7666 091556Z SEP 10.. Issued 2010-09-16 16:05Z. 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
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 4 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2010-09-21 02:59Z | 2010-09-21 05:29Z | — | 2 h 30 |
| 2010-09-22 02:59Z | 2010-09-22 05:29Z | — | 2 h 30 |
| 2010-09-23 02:59Z | 2010-09-23 05:29Z | — | 2 h 30 |
| 2010-09-24 02:59Z | 2010-09-24 05:29Z | — | 2 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
- 2010-09-16 16:05Z
- status
- Archived notice
- self-cancels
- 2010-09-24 06:29Z
- authority
- WESTERN RANGE OP W7666 091556Z SEP 10.
- NAVAREA
- NAVAREA XII
- issued by
- WESTERN RANGE OP
- sea
- North Pacific Ocean
- position
- 19.642, -134.033
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH PACIFIC.
HAZARDOUS OPERATIONS.
1. HAZARDOUS OPERATIONS 0259Z TO 0529Z DAILY
21 THRU 24 SEP IN AREAS BOUND BY:
A. 34-31N 120-40W, 34-33N 120-43W,
34-39N 120-37W, 34-37N 120-34W.
B. 28-49N 126-39W, 30-12N 125-22W,
29-49N 124-49W, 28-26N 126-06W.
C. 18-04N 135-49W, 21-43N 132-58W,
21-13N 132-15W, 17-34N 135-06W.
2. CANCEL THIS MSG 240629Z SEP.
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.
Collected reports in this area · military exercises
14 within 180 nm since 1999 · 0 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 051845Z to 052359Z apr, alternate 061845Z to 062359Z apr in areas bound by: a.…2023-04-03
- Hazardous operations 1845Z to 2359Z daily 03 thru 07 and 10 apr in areas bound by: a. 34-37.00N 121-24.00W,…2023-03-30
- Hazardous operations 271730Z to 280042Z oct, alternate 281730Z to 290042Z in areas bound by: a. 34-37.00N…2022-10-26
- Hazardous operations 261730Z to 270042Z oct, alternate 1730Z to 0042Z daily 27 and 28 oct in areas bound by:…2022-10-25
- Hazardous operations 251730Z to 260042Z oct, alternate 1730Z to 0042Z daily 26 thru 28 oct in areas bound…2022-10-23
- Hazardous operations 241730Z to 250042Z oct, alternate 1730Z to 0042Z daily 25 thru 28 oct in areas bound…2022-10-19
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 2026-10-04 03:08Z; 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.