The RF300 is a medium duty rudder feedback unit which connects directly to the Autopilot Pilot Computer using 2 wire frequency interface. Simrad rudder feedback units are high resolution units which contribute to gentle yet accurate steering that characterise the Simrad autopilots. They are rugged units designed to withstand the environment. Though Simrad now offers the virtual rudder feedback VRF for outboards and stern drive boats up to 40", it is neccesary to display rudder angle on your autopilot.