> Also, what about windmills on the ship itself? Great idea, powering a boat with wind. If only someone had thought of that sooner! Less facetiously, it's usu

> Also, what about windmills on the ship itself? Great idea, powering a boat with wind. If only someone had thought of that sooner! Less facetiously, it's usually better to use cylindrical rotating sails (which need power, but far less) or kites. Combined with solar could be an interesting prospect though.