Easily installed in a 4" dia. mounting hole, this flush-mount, easy-to-read compass has a 3 3/4" PowerDamp Plus, high-visibility blue dial with extra large white numerals. Built-in compensators easily adjust for deviation, while powerful DirectiveForce Magnets provide fast heading lock-on. Internal gimbal systems deliver maximum stability during adverse pitch and roll conditions. Features exclusive built-in green NiteVu night illumination and movable sunshield. 5-year warranty. Overall dim.: 5 1/8" dia. x 4 9/16"H.