This format can...
read and write waypoints
This format supports reading and writing wayponts to Bushnell GPS receivers, notably the Onix 400™.
It's an oddity for many GPSBabel norms that this format requires each waypoint be in a separate file. Our "output filename" argument, -F is modified to take an "output filename template". The output filename you specify will have a dash, and a sequentially increasing integer, and the ".wpt" extension appended to it. When the names are shown on the GPS itself, the shortnames from the source format are used and not these "made up" names.
Example 3.1. Command showing writing to Bushnell files
Consider the case where 'whatever.gpx' holds three waypoints.
gpsbabel -i gpx -f whatever.gpx -o bushnell -F /Volumes/Bushnell/WAYPOINT/whatever
will result in "whatever-0.wpt", "whatever-1.wpt", and "whatever-2.wpt" being
credated in that directory.
Windows users may prefer the spelling:
gpsbabel -i gpx -f whatever.gpx -o bushnell -F e:/WAYPOINT/whatever
At least for the 200CR, the directory name used by the device is "WAYPOINT" in the root directory. It's also worth mentioning that its USB Mass Storage protocol appears to not work on (at least) Snow Leopard 10.6.2. It's not known if other Onix models have a more compatible USB implementation.