Abstract
Recently, bulk carrier vessels of heavy tonnage, which are called the manmoth ships, has rapidly increased in their number, because of their economical excelence and remarkable technical development in shipbilding. Those ships are offering various difficult problems in every respect, especially in maneuvering ship in port. This paper is to report the noticeable gap between the inertia forces of ship's movement and the power of means to control them. (1) Comparison the value of manmoth ships with 20,000 DWT oil tanker, in displacement, out put of main engine, weight of anchor and etc, based on the length between perpendiculars. (2) Head reach in case of maneuvering crash astern. (3) Impact load of berthing ship against the dolphine and etc. (4) Difficulties in turnning ship.
