I found one app so far but it is limited. It seems like there is huge potential for an app that can count down to the start using haptic feedback so you never need to even look at the watch once you get comfortable with it. After the start some haptic feedback about speed and heading (lifting or knocking) would be great. I think you could also ping the ends of the starting line and give a pretty good distance to line read out as well. And of course, tracking the race and posting your track to your account, sharing on Facebook, etc. would be desired features. I know sailing is an obscure sport and limited market, but sailors do have money and would not be averse to paying for a quality app that worked across iPhone, iPad and Watch. BTW, I sailed five races last weekend in wet and cold conditions with no ill effect on the watch. We didn't join the swim team though.