Si-Tex Second Station Kit w/30' Cable SP-70. Rudder feedback verifies autopilot's commands Ghost rudder backup allows autopilot to use memory of rudder movements to calculate new movements in event of rudder feedback failure Heading output can be used to stabilize radar overlay on chart plotters with the radar overlay feature Built-in diagnostic and self tests plus visual and audible alarms Includes 30' of cable Package Contents: Si-Tex SP-70 Second Station Kit w/30' Cable Si-Tex 10080035: Second Station Kit w/30' Cable SP-70