There are a lot of track formats and extensions. Land/Air allows to work with many of them:
•*.TRK (CompeGPS own track format)
•*.BTRK (binary *.TRK, which can include attachments, compress more the data and have quicker access)
•*.IGC (International Gliding Comission format)
•*.FIT (Garmin Edge GPS)
•*.GPX (GPS Exchange File)
•*.TCX
•*.KMZ (Google Earth Track File)
•*.PLT (formato de OZI)
•*.CMP (Brauniger format)
•*.LOG (Magellan Tracklogs)
•*.NMEA (NMEA logs)
It is also possible to import tracks in *.TXT or *.CSV format.