This paper describes the issue of the correlation between predicted and measured resistance characteristics of a Lift & Buoyancy-Supported Craft (LBSC). LBSC is a fully-submerged type hydrofoil craft with a torpedo-shaped submerged body which provides buoyancy to support a considerable portion of the weight of the craft. The experiments at Osaka Bay were carried out by using HAYATE which is a one-sixth scale to the full-size Techno Super Liner. A 1/3.58 scale model of HAYATE was tested in the towing tank to predict HAYATE's resistance characteristics. As for extrapolating model resistance to the ship, a 2-dimensional extrapolation method was adopted, namely the total resistance was divided into frictional resistance and residuary one: the former is the sum of frictional resistance of each hull component. HAYATE's resistance characteristics obtained from the sea trial agreed fairly well with predicted one from the model test. Discussion was made as to the effect of the ship surface irregularities and the paint roughness on the frictional resistance.
