Tanker is a ship designed to transport oil or
its derivative products. There are main types of tankers
including oil tankers, chemical tankers and LNG
carriers. The tanker studied is a gas carrier tanker, in
which the level of accident risk is considered more. The
level of stability of the Tanker ship is influenced by the
wave activity in the ocean. So that in this study, the
design of ship rudder roll stability was made with sea
state 1 to sea state 7. The response results showed the
maximum overshoot rolling value reached 2.2 degrees
with step time -1 and the settling time of 60 s at sea state
7. Rudder is in a steady state with a 10 heading at a time
of 55 seconds.
Keywords : Tanker, Rudder Roll Stability, Sea State 7.