Patent ID: 8249764

Claim:
A method for operating a control device ( 1 ) of a motorized watercraft comprising: grasping a handle ( 15 , 16 ) connected to the motorized watercraft, the motorized watercraft having a drive unit ( 30 ) with a screw driven by an electric motor ( 31 ), wherein the electric motor ( 31 ), an operating unit ( 10 ), a motor control device ( 20 ), a battery control device ( 50 ) and a battery ( 60 ) are arranged in a vehicle body, the screw is arranged in a flow channel in the vehicle body, and data are transmitted between the operating unit ( 10 ), the motor control device ( 20 ) and the battery control device ( 50 ) by a controlled communication arrangement, wherein the handle ( 15 , 16 ) includes a hand grip sensor ( 18 ) having a movably seated permanent magnet, which is in operative connection with two magnetic field sensors, wherein actuating the at least one handle with the hand grip sensor controls an energy supply to the drive unit ( 30 ); performing data transfer and power transmission via a releasable full-load pin-and-socket connector ( 40 ) and wherein in case of the triggering of an emergency stop, a command for the electric motor ( 31 ) to stop is sent by the operating unit ( 10 ) via a system bus ( 43 ) to the motor control device ( 20 ), the operating unit ( 10 ) requests the number of revolutions of the electric motor ( 31 ) via the system bus ( 43 ), in case a number of revolutions greater than zero is detected a power stage ( 25 ) of the motor control device ( 20 ) is switched off, and in case of a number of revolutions greater than zero subsequently detected, the voltage supply to the motor control device ( 20 ) is switched off by an independent of the system bus.