HF-742W - Helmsman Compass Features: 3 3/4" PowerDamp Flat Dial. Easily Installed, Fits 4" (10.16 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: 2 lbs (907g). Protective Cover: H-741-C. Replacement Parts: Light Assembly: SH-0131XSP. Notes: All magnetic compasses come standard with 12 volt lighting. 24 & 32 volt lighting options are available. 12 volt lighting standard - 24 & 32 volt lighting options are available.