How does our Wind vane Self Steering work: South Atlantic S 440 - Wibo 835

Our Windvane self-steering is a fast and efficient steering system. The servo-pendulum system consists of a [sensor-vane] which transmits the change in the wind direction to the wind-vane rudder. The steering force of the servo oar is transmitted to the main rudder by two lines. The rudder is attached to the tiller by [lines] which move the tiller or wheel that steer the sailboat.