Hazardous operations 1339Z to 1523Z daily 13 thru 16 dec in areas bound by: a. 34-28N 120-39W, 34-30N…
North Pacific Ocean · NAVAREA XII 583/09
What this record establishes
Archived notice · 2009-12-11 18:49Z
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 102118Z DEC 09.. Issued 2009-12-11 10:30Z. 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 |
|---|---|---|---|
| 2009-12-13 13:39Z | 2009-12-13 15:23Z | — | 1 h 44 |
| 2009-12-14 13:39Z | 2009-12-14 15:23Z | — | 1 h 44 |
| 2009-12-15 13:39Z | 2009-12-15 15:23Z | — | 1 h 44 |
| 2009-12-16 13:39Z | 2009-12-16 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
- 2009-12-11 10:30Z
- status
- Archived notice
- self-cancels
- 2009-12-16 16:23Z
- authority
- VAFB OP W4818 102118Z 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
13 THRU 16 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 577/09.
3. CANCEL THIS MSG 161623Z 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
28 military exercises listed in force · see all
Record snapshot 2026-10-01 14:43Z; 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.