Exercises
Hazardous operations 1803Z to 1958Z daily 16 thru 18 dec in areas bound by: a. 34-28N 120-35W, 34-29N…
NAVAREA XII 424/99
- issued
- 1999-12-11 01:50Z
- status
- cancelled 1999-12-16 01:20Z (archive)
- self-cancels
- 1999-12-18 20:58Z
- authority
- VAFB OP# W4359 092235Z DEC 99
- sea
- North Pacific Ocean
- position
- 25.583, -122.505
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
1. HAZARDOUS OPERATIONS 1803Z TO 1958Z DAILY 16 THRU 18 DEC IN AREAS BOUND BY: A. 34-28N 120-35W, 34-29N 120-40W, 34-39N 120-38W, 34-38N 120-33W. B. 33-58N 120-51W, 34-13N 120-47W, 34-10N 120-30W, 33-56N 120-34W. C. 32-31N 121-12W, 33-32N 120-58W, 33-29N 120-40W, 32-29N 120-54W. D. 24-15N 123-24W, 27-08N 122-47W, 26-55N 121-36W, 24-03N 122-14W. E. 16-46N 125-16W, 19-48N 124-39W, 19-30N 124-03W, 16-28N 123-42W. 2. CANCEL THIS MSG 182058Z DEC.
Activity windows · 3 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 1999-12-16 18:03Z | 1999-12-16 19:58Z | — | 1 h 55 |
| 1999-12-17 18:03Z | 1999-12-17 19:58Z | — | 1 h 55 |
| 1999-12-18 18:03Z | 1999-12-18 19:58Z | — | 1 h 55 |
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
16 within 180 nm since 1999 · 0 in the last 12 months · 0 in force now
99
00
05
10
15
18
- Hazardous operations 102030Z to 110126Z jan, alternate 2030Z to 0126Z commencing daily 11 and 12 jan in…2018-01-05
- Hazardous operations 2100Z to 0126Z commencing daily 13 thru 18 dec in area bound by 26-25N 123-12W, 26-46N…2017-12-08
- Hazardous operations2014-10-21
- Hazardous operations 1600Z to 2000Z daily 19 thru 21 oct in area bound by a. 34-21N 120-38W, 34-22N 120-43W,…2005-10-17
- Hazardous operations 1547Z to 1727Z daily 18 thru 20 oct in areas bound by: a. 34-26N 120-39W, 34-26N…2003-10-16
- Hazardous operations 1547Z to 1727Z daily 15 thru 17 oct in areas bound by: a. 34-26N 120-39W, 34-26N…2003-10-10
Season · when military exercises happen here
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F
M
A
M
J
J
A
S
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month of issue, all years in the archive
Timeline
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.