On Jul 25, 1:51 pm, "GpsSpying.Com" wrote:
GSM mobile phone tracking system via the GPS-TRACK satellite network.
Based on repeater triangulation, the system tracks mobile phones using
GPS and GSM technology. Track anyone, anyutime, anywhere using their
cellphone number.

http://www.GpsSpying.Com/

I assume you mention this because this could be used by crews to track
cross-country sailplane pilots or even track location of crash.

For the lasts few years, all new cars have a gps device in them.
Between the cell phones and the cars, the government knows where
everybody is.