 Detroit is home to many One-Design fleets including North American 40s, Cal 25s, Cuthbertson and Cassian 35s, Crescent Sailboats, Express 27s, J 120s, J 105, and Flying Scots.The Crescent Sailboat, NA-40, and the L boat were designed and built exclusively in Detroit.Detroit also has a very active and competitive junior sailing program.