OpenTracker+ (OT1+) Please note that the OT1+ is currently being phased out due to component obsolescence. The OpenTracker USB has replaced it as our entry-level APRS tracker. The OpenTracker+ is an APRS tracker that can also receive data from other stations and has waypoint output capability. Use the OT1+ to report position, course and speed, time, and altitude when connected to a GPS -- not just