"OFFSHORE 75 COMPASSES BOATS 5 TO 9 M (17 TO 30 FT.) Watertight construction. Card design guarantees accurate readings and safe navigation under all weather conditions. Front reading; compact figures allow for easy reading; Perfect stability of conical card, 70mm apparent diameter. Bulb is integrated in the bowl All parts fully UV-ray treated, scratch resistant dome Clip-plate + screws come with Mini-binnacle and Bracket-mount models Flushmount: on a horizontal, vertical or inclined surface. Mini-binnacle: mounted on a horizontal surface with a clip-plate (supplied); compass is removable With a bracket: mounted on a horizontal or inclined surface. Compass is removable thanks to clip-plate"