Oil-filled for precision operation to depths of 260-feet (80m), the Dive Rite Compass can be worn on the wrist or mounted to any standard HP hose. It features a rotating 360-degree bezel with click stops and direct and reciprocal index points. The special design of the compass needle card and powerful magnets provides smooth movement across a wide range of motion. Large, easy-to-read numbers are displayed on the face and in the side window with index marks at 10-degree increments.