To meet the increasing demand for more purchase of a marine leisure boat, recently a high-speed powerboat for family use has been developed with the financial supports of the Ministry of Maritime Affairs and Fisheries of Korea. The resistance characteristics of the boat were experimentally evaluated in the towing tank at the Seoul National University. A light-weight cantilever type towing carriage was devised and installed in the towing tank. Wireless measurement devices were also provided for appropriate data acquisition during high-speed towing tests. With the new carriage system, a series of model tests have been performed to investigate the hydrodynamic characteristics of the powerboat and the model test results were compared to the sea trial results. Design alternative for hull form of the family boat has been proposed, and hydrodynamic performances have been evaluated experimentally.
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