Ritchie Helmsman Flush Mount Compass (RIT-HF-743)The Ritchie Helmsman White Flush Mount Marine Compass is easy to install and is a reliable navigation tool for boaters. This compass features built-in NiteVu night illumination for navigating in dark conditions, as well as a movable sun shield to reduce glare in bright conditions. The Helmsman Compass' built-in compensators allow for easy adjustments for deviation. Features: Easily Installed; 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; 100% Repairable; Exclusive 5-Year Ritchie Warranty; Specifications: CombiDamp Dial: 3-3/4"; Mounting Size: 4";