Use a Nuvi 350, OT2m, and a Kenwood TM-V71. It works and gives me waypoints of nearby stations, plus puts out beacons of my location, but also noted it is not super reliable. All in my toyota avalon while driving to work, and home. Set my beacon interval to 15 seconds, and my power medium. Seems to work to get some location beacons out. Tried smart beaconing, but that resulted in less packets transmitted, and a poor breadcrumb trail plotting on aprs.fi .
One trick I found was to make sure your gps (nuvi 350) has a lock on the location. My beacons do not seem to start until a few minutes after the gps is locked. Have to experiment more. Also need to experiment with digipeating while mobile, as did not realize I could have more problems. Need to turn digipeating off while mobile.
