Exercises
Hazardous operations 301500Z to 302100Z aug, alternate 311500Z to 312100Z aug in area within 52 miles of…
Eastern North Pacific · California · NAVAREA XII 356/17
- issued
- 2017-08-23 15:41Z
- status
- cancelled 2017-08-24 23:21Z (archive)
- self-cancels
- 2017-08-31 22:00Z
- authority
- SEA RANGE OTC 231536Z AUG 17.
- sea
- North Pacific Ocean
- position
- 34.667, -121.875 · r 52.0 nm
- source
- nga_json · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH PACIFIC. CALIFORNIA. 1. HAZARDOUS OPERATIONS 301500Z TO 302100Z AUG, ALTERNATE 311500Z TO 312100Z AUG IN AREA WITHIN 52 MILES OF 34-40.0N 121-52.5W. 2. CANCEL THIS MSG 312200Z AUG 17.
Activity windows · 2 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2017-08-30 15:00Z | 2017-08-30 21:00Z | — | 6 h |
| 2017-08-31 15:00Z | 2017-08-31 21:00Z | — | 6 h |
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
791 within 180 nm since 1999 · 4 in the last 12 months · 1 in force now
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- Hazardous operations 251300Z to 252100Z aug, alternate 261300Z to 262100Z aug in area bound by 33-37.00N…2026-08-20
- Hazardous operations 251400Z to 252000Z aug, alternate 261400Z to 262000Z aug in area within 56 miles of…2026-08-20
- Hazardous operations 221200Z to 230100Z aug, alternate 1230Z to 0100Z daily 23 and 24 aug in area bound by:…2026-08-17
- Hazardous operations 181700Z to 190001Z aug, alternate 1700Z to 0100Z daily, 20 thru 21 aug in area bound by…2026-08-13
- Hazardous operations 151900Z to 160000Z may in area bound by 34-39.47N 121-13.08W, 34-23.43N 121-02.07W,…2024-05-09
- Hazardous operations 091900Z to 092200Z may in area bound by 33-53.45N 120-27.05W, 33-43.15N 119-46.30W,…2024-05-04
Season · when military exercises happen here
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month of issue, all years in the archive
Timeline
- Cancel NAVAREA XII 356/17 and this msg, operations canceledcancelled by · 2017-08-24
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.