Navigator CompassNavigator Compass Features 4 1/2 CombiDamp Dial with Large Numerals Easily Installed, Fits 4.75 12.07cm Mounting Hole Exclusive Built-in Green NiteVu 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 45 Degree Lubber Lines High Temperature Construction for Extended Operating Range Custom Fitted Protective Covers Available 100% Repairable Exclusive 5-Year Ritchie WarrantyApprox. Shipping Weight 2 lbs 10 oz 1.19 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 32 volt lighting options are available.