抄録
We tried to investigate three methods to prevent the propeller of the training ship 'TENYO-MARU' from
being fouled by marine organisms in her home port. As a result, the more effective prevention is to use at the
same time both the method of jetting seawater with copper-ion and air on the propeller boss cap, and the method
of pouring seawater with the fomer from the clearance of stem tube to the propeller boss.
