Abstract
The auther has studied on the shifting of weights on board when ship rolls and on the rolling of ship listed caused by shifting. The following results have been obtained: -(1) The shifting force be obtained by the equation of motion (1), and "the angle of repose" depends largely upon the shifting coefficent and the position of weights on board as shown in Fig2. Then it is necessary to consider how to store the cargo and to put the shifting board on her roots. (2) When a ship has a list by shifting weights, she roll on each side about that list and at the begining of rolling by the action of wave and wind, she rolls much to that permanent list side, and weights shift to list side increasingly, so we must manoeuvre to avoid the shifting by alter her course for wave and wind. (3) Maximum inclination occures when the rolling by wave and wind action matchs to the shifting of weights on the same side, and the list angle by the shifting of weights grows to be twice the statical inclination. And the inclination by the wave mt. grows to large on small period, ratio so it is important to change the encounter period by moderate manoeuvering.
