a

The algorithm used is based upon Haldane’s theory using

 

maximum allowable nitrogen levels developed by Merrill Spencer.

Repetitive diving control is based upon experiments designed

and conducted by Dr. Ray Rogers and Dr. Michael Powell in

1987. Diving Science and Technology® (DSAT), a corporate Fig. 65 - O2BG affiliate of PADI®, commissioned these experiments.

Oxygen Accumulation Time Remaining (OTR)

When FO2 is set for Nitrox, Oxygen Accumulation (saturation or exposure) during a dive, or 24 hour period, appears graphically as the O2 Bar Graph (Fig. 65a) when the Alternate (O2) screen is accessed.

As time remaining before reaching the Oxygen Exposure Limit decreases, segments are added to the O2 Bar Graph.

a

When the amount of time remaining before reaching the O2

Limit becomes less than NDC (No Deco Dive Time Remaining),

 

calculations for that Depth will be controlled by O2. O2 Time

 

Remaining will then appear as Dive Time Remaining (Fig. 66a)

 

identified by the TIME and O2 icons.

 

As Oxygen Accumulation continues to increase, segments will

 

add to the O2 Bar Graph.

Fig. 66 - O2 DIVE TIME

 

REMAINING

 

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