They downgraded the system during the Gulf war conflict for Civilian users, we were carrying out a monitoring exercise at the time
The military one's were fine.
This was way before every Tom, Dick and Henrietta had one of course.
It makes a lot of difference where you mount them too in terms of speed of acquisition and real time tracking i.e. accuracy..
p.s. I am talking about pure Satnavs which is the same platform for the devices you are talking about.
