Abstract
Laboratory experiments on the leeway velocity of drifting objects have been conducted to investigate the drag coefficient ratio of 12 types of drifting body. The measured wave-induced drift velocities coincident well with the Stokes drift velocity. The drag coefficient ratio of drifting objects are found to be a function of the ratio of the projected frontal areas of the floating body above and under the water surface. The prection of the leeway trajectory of a drifting bouy on the sea of Japan is made under consideration of ocean current, tidal and drift currents. The prected trajectory of drifting bouy for 12 hours coincides well with the measured data.
