Ideal for runabouts, center consoles, ski boats, flat boats, bass boats, cars, trucks, and ATVs, the Ritchie Trek TR-33 Compass offers a sleek new design that's a great match for new boat styles. This surface-mount compass features strong directive force magnets and new lightweight composite dial for fast performance. 2-1/4" direct read dial with large numerals provides easy reading. Built-in compensators correct for deviation. Extra large diaphragm and rugged construction with high-impact rubber accent strip. Built-in 12-volt green NiteVu lighting. Exclusive 5-year Ritchie warranty. 3" dia. x 2-3/8" high.