Ritchie - F-82 Voyager Compass - Flush Mount - Black - F-82. Voyager Compass Features: 3" PowerDamp Flat Dial Easily Installed Into a 3 1/2" (8.89 cm) 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 Composite Construction for Extended Operating Range Custom Fitted Protective Covers Available 100% Repairable Exclusive 5-Year Ritchie Warranty Approx. Shipping Weight: 1lb 8oz (680g) Notes: All magnetic compasses come standard with 12 volt lighting. 24 & 32 volt lighting options are available.