Hazardous operations 1830Z to 2349Z daily 30 may thru 01 jun in areas bound by: a. 34-40N 124-10W, 34-59N…
North Pacific Ocean · NAVAREA XII 231/17
What this record establishes
Archived notice · 2017-05-25 23:12Z
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 170017Z MAY 17.. Issued 2017-05-25 08:29Z. 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 · 3 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2017-05-30 18:30Z | 2017-05-30 23:49Z | — | 5 h 19 |
| 2017-05-31 18:30Z | 2017-05-31 23:49Z | — | 5 h 19 |
| 2017-06-01 18:30Z | 2017-06-01 23:49Z | — | 5 h 19 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2017-05-25 08:29Z
- status
- Archived notice
- self-cancels
- 2017-06-02 00:49Z
- authority
- WESTERN RANGE 170017Z MAY 17.
- NAVAREA
- NAVAREA XII
- issued by
- WESTERN RANGE
- sea
- North Pacific Ocean
- position
- 34.831, -123.482
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH PACIFIC.
CALIFORNIA.
HAZARDOUS OPERATIONS 1830Z TO 2349Z DAILY
30 MAY THRU 01 JUN IN AREAS BOUND BY:
A. 34-40N 124-10W, 34-59N 124-10W,
35-00N 121-36W, 34-41N 121-36W.
B. 34-37N 125-46W, 35-02N 125-47W,
35-02N 125-12W, 34-37N 125-11W.
2. CANCEL THIS MSG 020049Z JUN 17.
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
374 within 180 nm since 1999 · 8 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 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 011800Z to 020100Z sep, alternate 031800Z to 040100Z sep in area bound by 32-46.00N…2026-08-31
- Hazardous operations 011800Z to 020100Z sep, alternate 031800Z to 040100Z sep in area bound by 32-46.00N…2026-08-27
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 18:27Z; 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.