Real time tracking is a fun way to keep track of your hunts. Using amateur radio and a GPS you are able to transmit your location all over the world. APRS is a small part of ham radio, that has some great features the could be used in geocaching. One feature is the emergency beacon, if you need help. It sends a emergency beacon of your current location, to a radio/internet network that can be seen all over the world. Fine a amateur radio operator in your area, he can answer any question for you. Here is some sites you can look at for more information.
http://www.arrl.org
http://eng.usna.navy.mil/~bruninga/aprs.html
You can track me on amateur radio APRS!
http://www.findu.com/cgi-bin/find.cgi?call=N3LJS-7
N3LJS
Rob
