they (Hobie) used to advertise 22.5 knots (25.9 mph) <img src="http://www.catsailor.com/forums/images/graemlins/crazy.gif" alt="" />

I've never put the GPS on our 16 but my son swears we've been airborne, more than once, while on a screaming reach <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />