Specifications

DECOMPRESSION MODEL

The Decompression Model used by the ATMOS

is based on the no

decompression multilevel repetitive dive schedules successfully tested

by Dr. Ray Rogers and Dr. Michael Powell. These tests did not in-

clude repetitive dives deeper than 90 feet (27 meters) or decompres-

sion dives. Due to the present unavailability of statistical data,

ATMOS

decompression predictions are based on U.S. Navy

theory.

TISSUE COMPARTMENT CONTROL

The ATMOS

tracks twelve tissue compartments with halftimes

ranging from 5 to 480 minutes. The Nitrogen Bar Graph always dis-

plays the controlling compartment that is the only one important at

that time. Think of the Nitrogen Bar Graph as twelve separate trans-

parent displays laid on top of one another. The compartment that has

filled up fastest is the only one the viewer can see from the top.

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

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

92 illustrates one compartment handing over control to another

compartment at a different depth. This feature of the Decompres-

sion Model is the basis of multilevel diving, one of the most im-

portant contributions the ATMOS

offers you.

Fig. 92 - Tissue Compartment

Control Hand Over

Display Seen

by the Diver

Tissue

Half-Times