Hazardous operations 162000Z to 170200Z aug, alternate 172000Z to 180200Z and 182000Z to 190200Z aug in…
North Pacific Ocean · NAVAREA XII 406/21
What this record establishes
Archived notice · 2021-08-16 22:51Z
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) · RTS MISSION SAFETY DIVISION 291818Z JUL 21.. Issued 2021-08-12 03:38Z. 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 406/21 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the North Pacific Ocean →
Activity windows · 3 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2021-08-16 20:00Z | 2021-08-17 02:00Z | — | 6 h |
| 2021-08-17 20:00Z | 2021-08-18 02:00Z | — | 6 h |
| 2021-08-18 20:00Z | 2021-08-19 02:00Z | — | 6 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2021-08-12 03:38Z
- status
- Archived notice
- self-cancels
- 2021-08-19 03:00Z
- authority
- RTS MISSION SAFETY DIVISION 291818Z JUL 21.
- NAVAREA
- NAVAREA XII
- issued by
- RTS MISSION SAFETY DIVISION
- sea
- North Pacific Ocean
- position
- 50.665, -160.892
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH PACIFIC.
ALASKA.
1. HAZARDOUS OPERATIONS 162000Z TO 170200Z AUG,
ALTERNATE 172000Z TO 180200Z AND
182000Z TO 190200Z AUG IN AREAS BOUND BY:
A. 54-13N 155-04W, 53-17N 158-19W,
52-43N 157-54W, 53-21N 155-19W,
53-57N 154-41W.
B. 52-29N 159-54W, 52-06N 162-26W,
50-51N 164-59W, 50-18N 165-03W,
48-48N 164-12W, 48-11N 162-30W,
48-30N 160-48W, 49-40N 158-02W,
50-46N 157-49W, 51-48N 158-13W.
2. CANCEL THIS MSG 190300Z AUG 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
7 within 180 nm since 2008 · 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 190830Z to 191430Z oct, alternate 0830Z to 1430Z daily 20 thru 29 oct in areas bound…2021-10-15
- Hazardous operations 210830Z to 211430Z jun, alternate 0830Z to 1430Z daily 22 thru 30 jun in areas bound…2021-06-22
- Hazardous operations 210830Z to 211430Z jun, alternate 0830Z to 1430Z daily 22 thru 25 jun in areas bound…2021-06-16
- Gunnery and pyrotechnic operations 201600Z to 210001Z sep in area within 16 miles of 51-40N 163-50W2017-09-20
- Gunnery exercises 090001Z to 090500Z aug within five miles of: a. 52-15N 163-00W2012-08-08
- Gunnery exercises 112200Z to 120300Z nov within five miles of: a. 53-45.9N 161-00.3W2008-11-10
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 2026-10-03 00:49Z; 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.