This article shares some interesting information (though sketchy) about GPS problems that will exist in the Southeastern US between January 20th and February 22nd.
It seems the government will be doing something (they call them tests) that will make GPS in that area be either off or unreliable for a large part of the time.
And while they say they will notify pilots of when these test will take place they don't mention how or even if they will alert drivers and others.
So be warned and watch out using or relying on GPS in that area during that time and mention it to anyone you know that might be affected.
FAA warns of ongoing GPS issues in southeastern US due to Defense Department 'tests'
Read more at www.engadget.comDon't panic, but anyone planning on using GPS in the southeastern US for the next month or so will likely want to make sure they have a fallback option. That's according to a flight advisory just issued by the FAA, which warns pilots that their GPS signal "may be unreliable or unavailable" due to "GPS tests" that the Department of Defense will be conducting between January 20th and February 22nd. Details are fairly light beyond that, but the FAA does note that when the "tests" occur they will be active for 45 minutes, and be followed by 15 minutes of off time -- additional notices to pilots will apparently be issued at least 24 hours prior to any test. Of course, while this particular advisory is directed at pilots, it will presumably will also affect all other GPS devices, as the FAA doesn't mention any GPS issues specific to aviation. The real question, however, is just what those mysterious "GPS tests" are -- if they're, in fact, GPS tests at all...