[Milsurplus] Re: GPS jammers?

[BOEING377 at aol.com]

In a message dated 10/2/2004 11:36:03 AM Pacific Daylight Time, 
milsurplus-request at mailman.qth.net writes:

> So the question - have any of the list members actually *seen* one of 
> the GPS jammers outside an exhibit at a show?
> 
> 

Yes, and they only cost about 39.95 at radio Shack.

There was a perplexing inability to receive GPS in the Moss Landing area in 
CA. Hams called in to help tracked it down to several cheap active dome or disc 
type TV antennas on boats that were always on and were radiating a very 
effective GPS jamming signal. It got the US Navy's attention is documented pretty 
well. see: 

http://66.102.7.104/search?q=cache:uTXWsTKYXPEJ:www.chips.navy.mil/archives/02
_spring/index2_files/GPS.htm+gps+moss+landing+jamming&hl=en

<<For example, GPS interference at Moss Landing harbor, near Monterey, 
California, was traced to a Radio Shack (Tandy Electronics) television antenna with 
an internal preamplifier. Although this may be an isolated instance, it does 
illustrate the potential for GPS disruption that would be unacceptable for 
safety-of-life applications. Whether from intentional or unintentional sources, 
GPS interference must be mitigated in order to protect GPS navigation accuracy.>>