Simrad SD10 Mechanical Drive Unit [000-13697-001]SD10 Mechanical Drive Unit The SD10 is a mechanical drive unit featuring built in rudder feedback for sailboats between 25ft and 37ft. The SD10 partners with Simrad autopilot computer as part of an autopilot system. (Access to a quadrant or tiller is required). Features: Highly Accurate Minor incremental adjustments provide a smooth auto steering experience Powerful 180kg of cable thrust ensures the rudder moves, even under heavy loads Easy &