S-87 Surface Mount Voyager Compass Features: 3" CombiDamp Dial. Compact low-profile design. Built-in green night illumination. Built-in compensators to easily adjust for deviation. Scientifically matched sapphire jewel and hardened steel pivot dial movement. Powerful DirectiveForce magnets for fast heading lock-on. Movable sun shield. High temperature composite construction for extended operating range. Custom fitted protective covers available. 100% repairable. Exclusive 5-year Ritchie warranty.