Helmsman Compass. Helmsman Compass Features, 3-3/4″ Flat Dial, 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, , Approx. Shipping Weight: 2lbs (907g), Notes: , Comes standard with 12V lighting. 24 & 32V lighting options are available. Some custom built OEM models may have different lighting., For all Helmsman built before 1992 please see the service manual page 5-14 or contact Ritchie for replacement lighting..