yachts were produced by an Australian multihull sailboat designer named Lachlan (Lockie) Crowther from Bairnsdale in the East Grippsland region of Victoria. Lock (which he preferred to be called) built his first boat, a trimaran called Bunyip, in 1959 while still a teenager. In 1960 he raced in the Easter regatta at Paynesville, Victoria, Australia, and won against a field of 300 boats. Lock then studied electrical engineering in Melbourne and in the early 1960s became involved in multi-hull design and the Amateur Yacht Research Society. In 1962 Trio was built based upon his designs. In 1969, Lock left Melbourne and moved to Sydney to design multihulls full-time. In 1969, his Kraken 40 won the New York to Bermuda race with him aboard. Crowther's first offshore racing trimaran, Bandersnatch, won the Sydney to Hobart multihull race in 1996. During his career, over 2500 of Lock Crowther’s designs were built.