The Veethree GPS Receiver is the most accurate
solution for converting an existing electrical speedometer into a GPS
Standard GPS with 1-second (1Hz) update rate that outputs NMEA 0183 info.
Fast update GPS with 1/10-second (10Hz) update that outputs NMEA 0183 info.
Fast update GPS with a 1/10- second (10Hz) update
that outputs 8- or 16-pulse signal to drive existing electrical
speedos on the market.