SPERRY GYRO NAVIGAT X MK1 MASTER COMPASS BODY MASTER PCB NAVIGAT X MK1: The Sperry Gyro Navigat X MK1 Master Compass Body is a key part of the gyrocompass system, providing highly accurate heading data for navigation. This component, combined with the Master PCB, ensures the system’s reliability and precision in all maritime conditions. Regular maintenance is required to keep the system functioning correctly.