Page 70 - Central America
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ince wall diving often involves diving ymptoms include lightheadedness, eu- ferent times and places, changing currents
phoria, mental confusion or a “drunken” and choppy surface conditions can cause
S Sdeep, wall divers should watch for the
onset of nitrogen narcosis, a physiological feeling. These symptoms subside when the the boat crew to lose track of your wherea-
condition that occurs when the nervous sys- diver ascends to a shallower depth. bouts. You may surface and find the boat far
tem is exposed to increased nitrogen pres- S urface signaling device is a good safety away and the crew not looking in your di-
sure. Nitrogen narcosis usually occurs at accessory for wall divers. When drift div- rection. In this case an audible, inflatable or
depths of 100 feet (30 m) but some divers reflective surface signaling device, or better
may begin to feel its effects at shallower ing along the wall, the boat follows the bub- yet all three, will come in handy.
depths. bles and picks the divers up as they surface.
The combination of divers surfacing at dif-
