Abstract: A method and arrangement for function test of steering for a propeller drive on a boat including a propeller drive suspended in a housing that can rotate, a servo motor which is arranged to rotate the rotating housing, a position sensor in association with the servo motor which is arranged to detect an angular position of the rotating housing, a control unit which is arranged to control the servo motor in response to an input signal from a control device corresponding to a required position and an input signal from the position sensor corresponding to an actual position.

Abstract: An arrangement and a method for controlling a propeller drive on a boat including a propeller drive suspended in a housing that can rotate, a servo motor which is arranged to rotate said rotating housing, a control unit which is arranged to control the servo motor in response to an input signal from a control device, corresponding to a required position of the rotating housing.

Abstract: A control system for a boat including a first hierarchical control module which includes sensors connected to a throttle to emit a control signal corresponding to the required acceleration and sensors connected to a control device to emit a control signal corresponding to the required direction of travel. A second hierarchical control module which is arranged to handle operating routines for power units including at least a propulsion motor and a servo device for a direction of travel setting device, where the operating routines generate operating signals for the power units in response to input data in the form of externally received target value signals, and a boat having such a control system.