The Aries vane gear has been in production since 1970. It works on the servo pendulum system in which the vane operates a servo rudder
which can swing sideways. This motion is transmitted to the tiller or wheel by ropes and blocks. The gear is suitable for all yachts up to 55 ft. L.O.A. The minimum size vessel is usually around 28 ft.
L.O.A. because the gear weight of 35 kg is unacceptable on smaller boats unless they have broad stern sections.