With the performance of a big compass and a style that fits today's most popular boats, Helmsman compasses feature high-impact, fiberglass-reinforced components with a matte finish. Accuracy and dependability are assured with sapphire jewels and tempered carbon steel pivots. PowerDamp (flat cards) and CombiDamp (direct reading cards) have lightweight baffles that eliminate spinning and dial jumping to make the Helmsman easy to read, even at high speeds. Features internal gimbals, built-in compensator magnets, 45 lubberlines, 12V DC nightlighting and movable sun shields.Specifications:Apparent Card Dia.: 3-3/4"Case Material: Reinforced polymerLubberlines: 0, 45Clinometer: NoLighting: 12VCover/Shield: YesWarranty: Five years