Exercises
Hazardous operations 0637Z to 0824Z daily 20 thru 22 dec: a. in area bound by 34-21N 120-44W, 34-23N…
NAVAREA XII 439/99
- issued
- 1999-12-17 12:15Z
- status
- cancelled 1999-12-21 07:55Z (archive)
- self-cancels
- 1999-12-22 09:24Z
- cancels
- NAVAREA XII 436/99
- authority
- VAFB 30 RANS SCHEDULING CENTER OP #W1836 162230Z DEC 99
- sea
- North Pacific Ocean
- position
- 14.889, -129.023
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
1. HAZARDOUS OPERATIONS 0637Z TO 0824Z DAILY 20 THRU 22 DEC:
A. IN AREA BOUND BY 34-21N 120-44W, 34-23N 120-50W,
34-45N 120-40W, 34-43N 120-34W.
B. WITHIN 20 MILES OF 34-07.2N 120-53.8W.
C. IN AREA BOUND BY 30-53N 122-24W, 31-59N 121-57W,
31-56N 121-46W, 30-50N 122-14W.
D. IN AREA BOUND BY 08-28N 131-50W, 17-07N 128-39W,
16-54N 128-03W, 08-16N 131-16W.
2. CANCEL NAVAREA XII 436/99.
3. CANCEL THIS MSG 220924Z DEC.
Activity windows · 3 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 1999-12-20 06:37Z | 1999-12-20 08:24Z | — | 1 h 47 |
| 1999-12-21 06:37Z | 1999-12-21 08:24Z | — | 1 h 47 |
| 1999-12-22 06:37Z | 1999-12-22 08:24Z | — | 1 h 47 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
This area · military exercises
3 within 180 nm since 1999 · 0 in the last 12 months · 0 in force now
Season · when military exercises happen here
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month of issue, all years in the archive
Timeline
- Cancel NAVAREA XII 439/99 and this msg, operations completedcancelled by · 1999-12-21
Nearby now · within 120 nm
Nothing else in force within 120 nm.
Worldwide now
35 military exercises in force · see all
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.