Oceanic Watch / Dive Computer GEO - Manual (Page 74)

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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
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 Alter-
nate (O2) screen is accessed.
As time remaining before reaching the Oxygen Exposure Limit
decreases, segments are added to the O2 Bar Graph.
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. 65 - O2BG
Fig. 66 - O2 DIVE TIME
REMAINING
a
a