The SI‑TEX Inboard Rotary Rudder Feedback with 50′ Cable is a marine autopilot rudder position sensor that tells your boat's autopilot system the actual physical position of the rudder. This feedback is essential for the autopilot to steer accurately and efficiently by comparing the commanded rudder angle with the actual rudder angle as the boat moves through the water. The unit includes a 50‑foot cable for flexible routing to your autopilot controller, but does not include the mechanical linkage that connects it to your rudder arm (sold separately).