A boat includes a steering load detector arranged to calculate an output value of a steering motor necessary for steering an outboard motor in a traveling state, a motor output detector arranged to detect a possible output value that can be output by the steering motor, a prediction determination unit arranged to compare the necessary output value from the steering load detector with the possible output value from the motor output detector, and an electric power load control unit arranged to perform a control operation so as to increase a battery charge amount and/or to reduce the electric power load when the necessary output value is determined to be larger than the possible output value. As a result, the boat that can effectively perform steering when a motor output becomes small as a result of a reduced battery charge amount.