I don't know how many of you on here are into sailing, but this is worth the read, even if you've never sailed before in your life.
Here's the article:
So in a nutshell it's been long believed that a sailboat couldn't exceed a speed of 50 knots on the water due to a phenomenon called cavitation where the keel reaches a speed at which the water literally vaporizes around it. The trailing bubbles behind the keel generate enough drag to prevent the boat from accelating past this speed. However very few sailboats even get close to this speed in the first place... Anyway... Paul Larsen the designer and pilot of this boat radically redesigned the hull, keel, sail....everything essentially to break past this hydrodynamic "sound barrier".
Check out the article, and the videos. It's really cool!
Here's a picture of the boat to piqué your interest