Hazardous operations 1339Z to 1523Z daily 11 thru 14 dec in areas bound by: a. 34-28N 120-39W, 34-30N…
North Pacific Ocean · NAVAREA XII 577/09
What this record establishes
Archived notice · 2009-12-11 10:30Z
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) · VAFB OP W4818 071643Z DEC 09.. Issued 2009-12-07 18:43Z. 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 |
|---|---|---|---|
| 2009-12-11 13:39Z | 2009-12-11 15:23Z | — | 1 h 44 |
| 2009-12-12 13:39Z | 2009-12-12 15:23Z | — | 1 h 44 |
| 2009-12-13 13:39Z | 2009-12-13 15:23Z | — | 1 h 44 |
| 2009-12-14 13:39Z | 2009-12-14 15:23Z | — | 1 h 44 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2009-12-07 18:43Z
- status
- Archived notice
- self-cancels
- 2009-12-14 16:23Z
- authority
- VAFB OP W4818 071643Z DEC 09.
- NAVAREA
- NAVAREA XII
- issued by
- VAFB
- sea
- North Pacific Ocean
- position
- 15.809, -125.386
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. HAZARDOUS OPERATIONS 1339Z TO 1523Z DAILY
11 THRU 14 DEC IN AREAS BOUND BY:
A. 34-28N 120-39W, 34-30N 120-48W,
34-46N 120-42W, 34-44N 120-33W.
B. 34-05N 121-02W, 34-24N 120-56W,
34-19N 120-35W, 33-59N 120-41W.
C. 12-36N 126-52W, 18-40N 125-40W,
18-22N 124-02W, 12-18N 125-18W.
2. CANCEL NAVAREA XII 570/09.
3. CANCEL THIS MSG 141623Z DEC.
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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- NAVAREA
- One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
- 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
41 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 151212Z to 151547Z sep, alternate 1212Z to 1547Z daily 16 thru 18 sep in area bound by…2018-09-10
- Hazardous operations2011-06-04
- Hazardous operations2010-11-03
- Hazardous operations2010-11-03
- Hazardous operations2010-10-28
- Hazardous operations2010-10-26
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 01:28Z; 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.