Garmin SteadyCast™ Heading SensorMeet the Garmin SteadyCast Heading Sensora plugandplay solution for Garmin chartplotters that keeps your bow orientation aligned with reality. It delivers fast calibration and premium heading accuracy so your onscreen heading reflects your actual heading every time you push off. Output rate: 10 Hz output to keep heading data current, even at trolling speeds or when the boat is at rest. Heading accuracy: 3 premium heading accuracy to align chart