I use GT-31 for windsurfing, but I find this very interesting link, for all other members who are using garmin foretrex for windsurfing. How to correctly set it up for speedsurfing, follow that nice video guide: http://www.davewhite.me/gps/garmin-setup/index.html

hope that will helps some mates here ;)

A nice historical artifact!

Amazing how they got that old $h!t to be so reliable....what went wrong