Mounts on a horizontal surface thanks to the unique clip-plate which allows the compass to be removed. Bracket : the broad and sturdy bracket base absorbs the vibrations. Mounting can be done on any surface, whatever the angle, provided that the compass + card unit remains horizontal at all times. Card design guarantees accurate readings and safe navigation under all weather or daylight conditions. Highly stable conical card, 70 mm apparent diameter. Every card is balanced individually in our workshops. Front reading : graduation every 5° and compact figures allow for easy reading. Lighting : Bulb is integrated in the bowl, thus speading the illumination evenly and preventing eye srain and fatigue at night. (Basic no-light version also available). Durable materials : All parts fully UV-impervious. Scratch resistant dome. Magnetic cell equipped with the unique ''Vibration Absorber'' system. Boat size - powerboats of 5 to 8 metres.