HF-743 - Helmsman Compass Features: 3 3/4" CombiDamp Dial. Easily Installed, Fits 4" 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-0195 KIT (Green), SH-0202 KIT (red); Uses 2 sets of the same light. Notes: All magnetic compasses come standard with 12 volt lighting. 24 & 32 volt lighting options are available. For all Helmsman built before 1992 please see the service manual page 5-14 or contact. Ritchie for replacement lighting. Some custom built OEM models may have different lighting.