The TAC-100 Underwater Navigation Board is the original navigation platform used by professional divers around the world. The TAC-100 integrates a underwater compass onto a rugged and lightweight high impact plastic console with easy-to-grip handles. The underwater compass utilises a black compass card with luminous markings to indicate heading. Internal lubber lines keep the diver on course. A built-in adjustable chem light holder on the console illuminates the compass for night ops. The TAC-100 offers different instrumentation options. Two options are offered for instrumentation packages. The DG100 is a rugged digital depth gauge and timer that tracks both depth and time in one compact package. The second option is an analogue depth gauge and dive chronometer. Both options offer effective solutions for accurate navigation during critical dive situations. TAC100-1 Navigation Board. Size of board: L 30.5cm. W 25.4cm. H 12.7cm. Weight in air: 3lbs (1.35kg). Board material: Black ABS. Compass illumination: Adjustable chemlight. TAC100-2 Underwater Compass. Compass card bearings: 5° markings. Illumination: Up to 8 hours. Compass card tilt: 20°. Size: D 10cm. H 9.5cm. 325g weight in air.