The International Windsurfer Class World Championships is an bi-annual international sailingregatta of Windsurfer Class which is one design windsurfer, organized by the host club on behalf of the International Class Association and recognized by World Sailing, the sports IOC recognized governing body. In 1973 the US Nationals was held San Diego / USA and served as the class first international event it was won Bruce Matlack (USA) by Susie Swatek (USA).