[Gpsbabel-misc] Filter 'bad' points

[David H. <dav...@sp...>]

Hi,
I have a Garmin eTrex Vista CX (IIRC) and I've installed the latest beta
of GPSBabel (1.3.5.??) running on Windows Vista.
The problem I have is this...
When I'm out in the mountains (snowboarding/hiking) I get aberrant points
where I seem to have traveled at 400km/h (I'm pretty fast but this seems a
little high :)). I assume this is caused by inaccurate GPS readings in
less than ideal conditions. Is there a way I can filter these bad points
out using gpsbabel? I've looked in the docs and searched the archive but I
haven't found anything yet.
Thanks in advance for your help
David Hayes