Provides stabilized heading data to Raymarine multifunction displays equipped with radar. The Smart Heading Sensor delivers the same gyro stabilized heading information provided by our gyro equipped Smart Pilot autopilots. Features: Provides fast, stable and accurate heading data over NMEA 0183.Significantly improves stability of radar/chart overlay. Significantly improves performance of MARPA. Improves target acquisition, retention and calculation of target tracking data, especially when conditions deteriorate. Easy to install, and set up. Easy to calibrate using soft keys and menu on the multifunction display. Easy compass alignment to COG.