I have not used APRS, so I only know about it in abstract. I don't have a GPS receiver. I know Wes has used APRS recently out at Cruise Moab, not sure if anyone else in the club is using it. It's a position reporting system, so yeah that's all it does, but knowing location of others in town or the trail can be leveraged for lots of uses.
"Silent enim leges inter arma." -- Cicero