A system and technique for improving the speed and ease of missing vehicle
location and recovery by vehicle-carried transponder periodic coded
replies to radio interrogation by a network of (VHF) transmitting towers,
by integrating a concealed GPS location receiver with the transponder and
providing the GPS-obtained coordinate information through the VHF network
to enable a preliminary initial recovery location from which to home-in
for recovery by subsequent direction-finding from the periodic
transponder responses. Other location-on-demand services are also readily
operable through the use of this VHF network, including providing said
GPS coordinate or location information on the Internet.