Page 339 - Hawaii: Diving, Surfing, Pearl Harbor, Volcanoes and More

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