Hazardous operations 100900Z top 101800Z jul, alternate 130900Z to 131800Z jul in area bound by 31-13-21N…
North Pacific Ocean · NAVAREA XII 306/21
What this record establishes
Archived notice · 2021-07-10 18:32Z
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 022030Z JUL 21.. Issued 2021-07-06 04:45Z. 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 304/21, 305/21, 306/21 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2021-07-13 09:00Z | 2021-07-13 18:00Z | — | 9 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2021-07-06 04:45Z
- status
- Archived notice
- self-cancels
- 2021-07-13 19:00Z
- authority
- SEA RANGE OTC 022030Z JUL 21.
- NAVAREA
- NAVAREA XII
- issued by
- SEA RANGE OTC
- sea
- North Pacific Ocean
- position
- 31.034, -136.825
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH PACIFIC. 1. HAZARDOUS OPERATIONS 100900Z TOP 101800Z JUL, ALTERNATE 130900Z TO 131800Z JUL IN AREA BOUND BY 31-13-21N 136-21-34W, 31-04-36N 137-16-57W, 30-49-37N 137-15-27W, 31-01-22N 136-20-03W. 2. CANCEL THIS MSG 131900Z JUL 21.
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
24 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 021230Z to 022000Z may, alternate 041230Z to 042000Z may in area bound by 30-52.95N…2023-04-27
- Hazardous operations 131400Z to 132100Z mar, alternate 1400Z to 2100Z daily 15 and 22 mar in area bound by…2023-03-08
- Hazardous operations 091400Z to 092200Z dec, alternate 1400Z to 2200Z daily 12 and 13 dec in area bound by…2022-12-04
- Hazardous operations 291230Z to 292030Z nov, alternate 1230Z to 2030Z daily 30 nov and 01 dec in area bound…2022-11-24
- Hazardous operations 051200Z to 052100Z nov alternate 1300Z to 2200Z daily 08 and 09 nov in area bound by…2022-11-01
- Hazardous operations 211230Z to 212000Z mar, alternate 1230Z to 2000Z daily 23, 25 and 26 mar in area bound…2022-03-16
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
28 military exercises listed in force · see all
Record snapshot 2026-10-02 11:01Z; 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.