Page 270 - French Polynesia
P. 270
ince wall diving often involves diving ymptoms include lightheadedness, eu- currents and choppy surface conditions
can cause the boat crew to lose track of
S deep, wall divers should watch for the S phoria, mental confusion or a “drunken” your whereabouts. You may surface and
find the boat far away and the crew not
onset of nitrogen narcosis, a physiological feeling. These symptoms subside when the looking in your direction. In this case an
condition that occurs when the nervous diver ascends to a shallower depth. audible, inflatable or reflective surface
system is exposed to increased nitrogen signaling device, or better yet all three, will
pressure. Nitrogen narcosis usually oc- S urface signaling device is a good safety come in handy.
curs at depths of 100 feet (30 m) but some accessory for wall divers. When drift
divers may begin to feel its effects at shal- diving along the wall, the boat follows the
lower depths. bubbles and picks the divers up as they
surface. The combination of divers surfac-
ing at different times and places, changing
