Patent ID: 7886678

Claim:
A watercraft comprising: a plurality of watercraft propulsion units; at least one generator provided for each of the plurality of watercraft propulsion units; a rudder deflecting system arranged in each of the plurality of watercraft propulsion units, each rudder deflecting system being driven by an electric motor, and the plurality of watercraft propulsion units being arranged to be turned by operation of the rudder deflecting systems thereby steering the watercraft; a main battery arranged in each of the plurality of the watercraft propulsion units and electrically connected thereto; and a sub-battery connected to the plurality of the watercraft propulsion units; wherein the at least one generator for each watercraft propulsion unit and the rudder deflecting systems are arranged such that electric power can be supplied from the at least one generator for each watercraft propulsion unit to the rudder deflecting system of another watercraft propulsion unit included among the plurality of the watercraft propulsion units; and when an electric power consumption of the rudder deflecting system of a first watercraft propulsion unit is larger than an electric power consumption of the rudder deflecting system of a second watercraft propulsion unit, a portion of the electric power generated by the generator of the second watercraft propulsion unit is supplied to the rudder deflecting system of the first watercraft propulsion unit in addition to the electric power generated by the generator of the first watercraft propulsion unit being supplied to the rudder deflecting system of the first watercraft propulsion unit.