I'd like to analyze GPS data with some sort of software helping to learn
something about my regattas.
I've found just GarTrack. It's very very simple and most of all accept just
a strange file format (gardown)
The results is that I cannot get neither convert (many hours spent on
Internet) my data to something GarTrack could be feeded with.

Do you know something better than GarTrack that, also, can accept a more
widely available file format?

Thanks for helping.
Alberto.-