BN-202 Navigator Compass Features: 4 1/2" Ritchie CombiDial and Built-in Clinometer. Internal Gimbal Systems for Maximum Stability During Adverse Pitch and Roll Conditions. Scientifically Matched Sapphire Jewel and Hardened Steel Pivot Dial Movement. Built-in Compensators to Easily Adjust for Deviation. 45 degree Lubber Lines. Exclusive Built-in Dual 12 Volt NiteVu Lighting. Fiberglass Reinforced Bowl. Easily Installed, Fits 5.75" (14.61 cm) Mounting Hole. Click here to view a template of the mounting hole (NOTE: Be sure you print the template actual size). 100% Repairable. Exclusive 5-Year Ritchie Warranty. Approx. Shipping Weight: 2 lbs 5 oz (1.05 kg). Protective Cover: BN-C. Replacement Parts. Light Assembly: Upper: NV-0045XSP; Lower: NV-0044XSP. 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.