Navigator CompassNavigator Compass Features 4-1/2 Ritchie CombiDial and Built-in Clinometer Easily Installed, Fits 5.75 14.61cm Mounting Hole Internal Gimbal Systems for Maximum Stability During Adverse Pitch and Roll Conditions Scientifically Matched Sapphire Jewel and Hardened Steel Pivot Dial Movement Fiberglass Reinforced Bowl 45 degree Lubber Lines Exclusive Built-in 12V Amber LED Lighting Built-in Compensators to Easily Adjust for Deviation 100% Repairable Exclusive 5-Year Ritchie WarrantyApprox. Shipping Weight 2 lbs 5 oz 1.05 kg Notes For Navigators built before 1986 please see the service manual page 6-12 or contact Ritchie for replacement lighting.12 volt lighting standard 24 32V lighting options are available.