+<para>
+ Because speed isn't a real member of a normal waypoint, you can put the speed values into
+ the waypoint names. "Point@30" will result in a speed value of 30. By default we assume these
+ values are in kilometers per hour.
+</para>
+<para>
+ Proximity distance is also supported by <link linkend="fmt_gpx">GPX</link>, <link linkend="fmt_gdb">Garmin GDB</link>, <link linkend="fmt_ozi">OZI Explorer</link>,
+ <link linkend="fmt_compegps">CompeGPS</link> and <link linkend="fmt_unicsv">Universal CSV</link>.
+</para>
+<para>
+ <userinput>
+ gpsbabel -i gpx -f "warnings.gpx" -o garmin_gpi,alerts=1 -F "warnings.gpi"
+ </userinput>
+</para>