Note: This page describes an obsolete version of GPSBabel that may substantially differ from the current or development version.
This format can...
read and write tracks
This format supports tracks from Bushnell GPS receivers, notably the Onix 400™.
This format reads individual .trl files as written by the GPS. As this is a reverse-engineered format, it's not understood how (or even if) long tracks, in particular, span multiple files so initially this format is most effective on tracks under a few thousand points.
When writing tracks, a maximum of 4502 points is supported as this is the most we believe these units can represent in a track.
The output base filename, converted to uppercase and stripped of everything but letters and digits, is used for the trail name inside the file itself.