Revelation II: Windmill powered boat

Via Treehugger

“The 36 foot catamaran, Revelation II, is powered by 3 20-foot long carbon fiber propellers on a 30 foot rotating mast. The windmill transmits power to a 6 blade propeller underwater, with the net result that the boat can make way even directly into the wind.”

The boat was apparently built by Jim Wilkinson who is a member of the AYRS or Amateur Yacht Research Society.