Helmsman CompassHelmsman Compass Features 3-3/4 PowerDamp Flat Dial Easily Installed, Fits 4 10.16cm Mounting Hole. NOTE Be sure you print the template Actual size 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 Adapter Rings Available. Sold separately. 6 15.24 . Retrofits Existing Mounting Hole for Model No. HF-72 order H-ABLK. For Model No. HF-72W order H-AWHT 100% Repairable Exclusive 5-Year Ritchie WarrantyApprox. 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.