 He was the helmsman of the Australian boat in the star class at the 1968 Mexico City Olympics, where it finished eighth, and at the 1972 Munich Olympics, where he won a gold medal with John Anderson OAM.In 1975, Forbes was part of the winning Soling team in the North American Championship and that same year, won the pre Olympic Regatta at Kingston.At the 1976 Montreal Olympics, he helmed the Australian boat which finished eleventh in the soling class.