Abstract
The purpose of this study is to clarify the characteristics of moored ship motions at fishing ports in Hokkaido by using the results of questionnaire asking forfishing ports users.
It is considered that the characteristics of ship motions depend on geographical features, shape of ports and mooring conditions. The results of questionnaire demonstrate that the troubles in cargo handling caused by ship motions occur to nearly all of investigated fishing ports, and the troubles are caused by long period waves. So, it is effective to avoid the troubles bychanging the shape of harbor and mooring conditions.
The allowable ship motions of fishing boats are ±0.5m for surging, +0.5m for swaying and ±0.5m for heaving. These values are smaller than values of large size ships.
