The Ritchie B-51-CLM Bracket Mount Explorer Compass features a 2-3/4" easy-to-read direct reading dial with internal green night illumination for optimal visibility in low light. Its adjustable and removable design includes a bracket and thumbscrews for secure mounting. Equipped with built-in compensators, it allows precise deviation adjustments. The compass utilizes a scientifically matched sapphire jewel and hardened steel pivot for smooth, accurate dial movement. Constructed from high-temperature composite materials, it withstands extended operating ranges. Powerful directive force magnets enable fast heading lock-on, complemented by a movable sun shield and standard 12-volt lighting. This compass is fully repairable, ensuring long-term reliability.