To simplify the operation necessary for ship maneuvering by setting the throttle opening, shift position, steering direction and steering angle according to the operating position of a control stick on the basis of the signal showing the operating position, and controlling each actuator.

A control stick 36 is tilted from the neutral position to an optional direction by an optional angle, the X, Y-directional position signal detected by a stick sensor is inputted to the control part of a first control unit 17. In this control part, the virtual operating positions of a throttle arm 44, a bucket 9 and an injection port 8 are arithmetically set on the basis of the position signal from a map preliminarily stored therein, and this is transmitted to the control part of a second control unit 22 to perform a control. Accordingly, since a hull can be moved in the inclining direction of the control stick 36, and the navigation speed can be also increased according to the increase in inclination of the control stick 36 in ahead and astern moving, the ship maneuvering can be facilitated.