Simrad Autopilot Corepacks are available with either a Simrad AC12 or AC42 Autopilot Course Computer. Simrad AC12 Autopilot Course Computers are recommended for RPU80, HLD350Mk2, MSD50, SD10 and solenoid operated steering. Simrad AC42 Autopilot Course Computers are for heavy duty use with RPU160, RPU300, HLD2000Mk2x and DD15 Drive Units. The optional RF300 Rudder Feedback includes transmission link and a 10M (33') cable.All Simrad Autopilot Corepacks include: