This In this paper have a purposes to examine the performance of fuzzy logic controller used to control a dynamic position system of USV. The dynamic position system is controlled system which uses the thruster vessels such as propeller, bow thrusters and rudder. The thuster can be maintain the position and heading of the USV in automatically. By numerical simulation, the study to solve the problem motion and postion of dynamic positioning control. The environmental loads is wave disturbance with gaussian random noise as external forces to effect a changes position and angle heading of vessel. The fuzzy logic controller used in this paper is mamdani logic type to control the scheme of dynamic position system. The results show the system can be maintain the position and haeding of ship. Even though the surge position of ship have a long time response to maintain the position.

Keywords : Fuzzy Controller, Dynamic Position, USV.