Nav aids

GPS jamming exercises 1900Z to 0845Z commencing daily 15 thru 18, 21 thru 25 jan, 05 thru 08 and 11 thru 15…

NAVAREA XII 5/08

issued: 2008-01-09 14:41Z
status: cancelled 2008-02-16 09:45Z (archive)
self-cancels: 2008-02-16 09:45Z
authority: NAVCEN USCG 09 JAN 08.
position: 37.340, -116.033 · r 324.0 nm
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. GPS JAMMING EXERCISES 1900Z TO 0845Z COMMENCING
   DAILY 15 THRU 18, 21 THRU 25 JAN, 05 THRU 08
   AND 11 THRU 15 FEB WITHIN 324 MILES OF
   37-20-23.4N 116-01-58.4W.
2. CANCEL THIS MSG 160945Z FEB.

Activity windows · 4 in this warning

opens (UTC)	closes (UTC)	local	length
2008-01-15 19:00Z	2008-01-16 08:45Z	—	13 h 45
2008-01-16 19:00Z	2008-01-17 08:45Z	—	13 h 45
2008-01-17 19:00Z	2008-01-18 08:45Z	—	13 h 45
2008-01-18 19:00Z	2008-01-19 08:45Z	—	13 h 45

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

This area · aids-to-navigation notices

2 within 180 nm since 2008 · 0 in the last 12 months · 0 in force now

The GPS navigation signal may be unreliable until 27 mar due to interference testing on GPS frequencies used…2008-03-26

Season · when aids-to-navigation notices happen here

month of issue, all years in the archive

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

193 aids-to-navigation notices in force · see all

Nav aids

Lights extinguished, buoys off station, RACON/NAVTEX outages. All current aids-to-navigation notices →

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.