Product Description: Raymarine M81132 Mechanical Linear Drive, Type 2 Long The most commonly used drive types for sailing vessels. Raymarine mechanical linear drives provide powerful thrust, fast hard-over times and quiet operation. Mounted below decks, the linear drive moves the rudder directly by pushing the tiller arm or a rudder quadrant. A linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering manufacturer may be required. Must be able to back-drive steering system from the rudder.