Probably the most innovative concept in sailboard sail design occured in 1984-1985 when the RAF (Rotating Aero Foil) concept was introduced by Neil Pryde. The idea here was to use battens in the sail (much like catamaran sails had in this era) to stabilize the shape and then using a combination of batten tapering and sail cut design; allow those battens to shape the sail to become an aerofoil shape that rotated either side of the mast. Additionally in 1985, purpose built WAVE sails featured very high profiles (IE over 5metres of mast (or mast plus extension) and SHORT booms 1.4 metres for quite large sails. Whilst the GARDA line of sails featured specs (shorter masts and longer booms) that were continued through the 80's. The Neil Pryde RAF in 1985 was actually designed and started production in 1984 but wasnt really available until 1985 to the public (and featured in magazines / catalogs). In 1984 you could catch glimpses of the WAVE sail as a prototype being used by some of the windsurfing stars of the era. Even today peope who grew up with this sail still recall it with reverence and a few lucky ones like me have one in our collection ready to use on special days.