A GPS data logger is required. The GPS unit must be able to log and store the GPS data for the trip and then EXPORT in one of the following formats:
- CSV (comma-separated values) file (csv),
- Text (tab-separated text) file (txt),
- NMEA Text (GPS-standard) file (txt),
- GPS Exchange file (gpx),
- Track file (trk),
- Garmin Database v 1.0/2.0 file (gdb).