Specifications

DECOMPRESSION MODEL

The decompression model used by the 500AI is based on the no decompression

multilevel repetitive dive schedules successfully tested by Dr. Ray Rogers and

Dr. Michael Powell. These tests did not include repetitive dives deeper than 90

feet (27 m) or decompression dives. Due to the present unavailability of statis-

tical data, 500AI decompression predictions are based on U.S. Navy theory.

MULTIPLE TISSUE TRACKING

The 500AI tracks twelve tissue compartments with halftimes ranging from 5 to

480 minutes. The Nitrogen Bar Graph always displays the controlling com-

partment that is the only one important at that time. Think of the Nitrogen

Bar Graph as twelve separate transparent displays laid on top of one another

(Fig. 83). The tissue compartment that has filled up fastest is the only one the

viewer can see from the top.

At any particular point, one tissue compartment may be absorbing nitrogen,

while another that was previously higher may be off-gassing. Figure 84 illus-

trates the point at which one compartment “hands over” control to another

compartment at a different depth. This feature of the Decompression Model is

the basis of multilevel diving, one of the most important contributions the

500AI offers you.