The M-Scow is a 16 ft (4.9 m) sloop-rigged scow. Commonly called the M-16, the M-scow is sailed widely from Minnesota to New Jersey. The boat was originally designed by Melges Boat Works and became an ILYA sanctioned class in 1959. Over the years, there have been several builders, including: Melges, Larson, Bay Boats, Pegal, Gill, Bowland, Tanzer Industries and Johnson. The M-20 is a slightly newer, and bigger version of the M-16. The M-16 sports bilgeboards and two small "paddle" rudders along with a rotating mast. Windward Boat Works became the new builder of the M scow in 2007. A national organization was re-formed in 2007, with a national championship to be sailed for each September.