Catamaran

Catamarans are keel-less sailboats. Instead of a dagger-like piece of wood or metal keeping the boat upright, a catamaran is two pontoons attached together, with a sail in the middle. Since they use triangular rigging, catamarans can tack and outperform square-rigged ships, especially in windy conditions. Catamarans are nearly impossible to turn over, unless they happen to be sailing through a hurricane. They do not use fuel. The numbers below represent average winds.