The most important criteria when selecting a compass are dial size and mounting style. Quality components aid accuracy, smooth response, stability and trouble-free operation. RITCHIE NAVIGATION's Angler Compass RA-91 is for marine use and is Gray with a blue Direct-Read dial. This compass is easy to install on your marine vessel with the provided surface mount! It features 2-3/4" Direct-Read dial, easily adjustable bracket mount with thumbscrews, no-glare Gray finish, high-visibility blue dial, distinctive RitchieAngler graphics, Hardened Steel Pivot Movement, Sapphire Jewel Movement and internal green NiteVu illumination. Included are built-in compensators, a movable sun shield and Directive Force magnets. This compass is 100..