<para>
This option is used in conjunction with the merge option to discard track points with missing
timestamps instead of aborting with the "Found track point at lat,lon without time!" error.
</para>
<example xml:id="ex_track_discard">
<title>Merging tracks with missing timestamps with the track filter</title>
<para>
Suppose you want to merge tracks that may have missing timestamps.  To do that, use this command line:
</para>
<para><userinput>gpsbabel -t -i gpx -f john.gpx -f doe.gpx -x track,merge,discard -o gpx -F john_doe.gpx</userinput></para>
</example>
