Raymarine Type 2 Long Linear Drive Unit - 24V [M81134]M81134 Type 2 Long Mechanical Linear Drive 24V Raymarine's 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