Direct reading underwater navigation compass.
Counter clockwise degree markings provide direct reading of the
course. The North indicator is aligned to the given course, then
navigation is by following the direction arrow (no mental arithmetic
required).
Screw top accessory case with snap action belt clip .
Holds small non-waterproof items such as electronic car keys,
memory cards, etc. (originally designed to hold cigarettes and
matches). Fits onto 2"
belt Clear polycarbonate
with O-ring seal. Internal dimensions /mm: 46 diam, 91 h.