Abstract
During recent years strong efforts have concentrated on manufacturing huge vessels, as a result, a 200.000 DWT tanker is now placed in service and it is also planning to build a 500, 000 DWT tanker.
However, there exist many problems to have to be solved in the tendency of being mammoth tanker.
In this paper, it is described a summary of the problem associated with huge vessels which is mainly investigated in Japan.
