HSC Sea Runner is a 74 m (243 ft) ocean-going catamaran built in 1990 by International Catamarans (Incat) for the UK company, Hoverspeed. In 1990, she took the Hales Trophy for the fastest eastbound transatlantic journey, making the run, without passengers, in three days, seven hours and fifty-four minutes, averaging 36.6 knots (67.8 km/h).