A STUDY ON EVALUATION OF SEAKEEPING PERFORMANCE FOR PASSENGER SHIPS (2ND REPORT); MEASUREMENTS OF SHIP MOTIONS AND VOMITING RATIO OF PASSENGERS

To evaluate the method for assessing the seakeeping performance of a passenger ship based on the seasickness ratio of the passengers which was proposed in the first report, measurements of ship motions and seasickness ratio of passengers was carried out for two passenger/car ferries and a fast passenger ferry. The results demonstrate that the vertical acceleration, which has a significant effect on seasickness, depends on hull form and advanced speed, and that the relationship between the passengers seasickness ratio and vertical acceleration (amplitude and frequency) is in good agreement with experimental results by O'Hanlon et al.