That's the basic equation that gets us across the oceans and will power the America's Cup. It's also the equation that keeps wingsuit flyer extarordinaire Alexander Polli from dying–and allows him to make spectacular video.
I view sailing as being at one end of a Bernoulii spectrum, that goes through kitesurfing to wingsuit flying. And the spectrum is all about freedom and natural forces. But if you need a little water to get why I am posting this, then make sure you watch until 1:40 in the video.