My problem with my Garmin Etrex GPS is, I can't read it when I'm going fast! I did once have it tied to my tramp and while sitting down, sailing solo under spin, I saw 17.5, but when I got up to trap and go faster, I couldn't read it anymore!

I know a couple weeks ago when that tropical storm came by, we had some good wind, and I took Tom out for some blast reaching across the lake, no spin, just blasting along on a reach with the boards half way up, skipping on the wave tops like windsurfer. We were going quite a bit faster than I was that day I saw 17.5 solo, but we didn't have the GPS on board. Next time I'll bring it...if I can remember.