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In this paper, one of the most important problems concerned with the automatic control for marine ships, namely the problem of suppression of external disturbances act on a ship, about which we have no information except its boundedness, is considered. In most problems presented in the scientific literature disturbances are usually specified in a particular form. The new method of suppression of bounded disturbances is proposed. The control is sought as a static state feedback. The requirement of the desirable degree of stability is also fulfilled. The paper proposes a method of forming the automatic control law for seagoing vessel providing simultaneously the three above-mentioned properties of a closed system: the best suppression of limited external disturbances, the desired degree of stability of the closed-loop system and astatism on yaw. For the specific model of a marine ship was found the controller, provided the restriction of exogenous disturbances, taking into account all technical requirements. The results are illustrated.