What would be even BETTER would be if something like GPSapp would transmit your current GPS coordinates over the Ham Radio link... I can't recall the name of the packet service, but it will allow you to track your vehicle's whereabouts
I believe BBS User rowitech (Rolf) has a similar car-tracking set up he was telling me about at the Amersfoort meet this summer. You might want to ask him how his is set up.

John
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1998 BMW ///M3 30 GB Mk2a, Tuner, and 10 GB backup