On 7/25/2011 4:24 PM, Papa3 wrote:

From "The Economist":

"Such devices are illegal to sell or use, but they have become popular
with commercial drivers who object to their employers tracking their
every move. A jammer prevents a tracking device in the vehicle from
determining (and then reporting) its location and speed—but it also
disrupts GPS signals for others nearby."

Link to full article. http://www.economist.com/node/18304246



I still don't understand this -- are trucking companies so dense that
they can't figure out that one of their drivers is jamming the GPS
signal? Seems like a driver who jams the signal would soon be looking
for a new job.