CLASS A – All square-rigged vessels and all other vessels over 40 meters (131 feet) length overall (LOA)
CLASS B – Traditionally rigged vessels with LOA of less than 40 meters (131 feet) and with a waterline length (LWL) of at least 9.14 meters (30 feet)
CLASS C – Modern-rigged vessels with LOA of less than 40 meters (131 feet) and with LWL of at least 9.14 meters (30 feet), not carrying spinnaker-like sails
CLASS D – Modern-rigged vessels with LOA of less than 40 meters (131 feet) and with LWL of at least 9.14 meters (30 feet), carrying spinnaker-like sails