Oceanic GEO 2, Operating Manual, Page: 48 / 124

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FO2 Gas 1 will continue to reset to the FO2 50% Default after subsequent repetitive dives
until 24 hours elapse after the last dive, or the FO2 50% Default is set Off.
FO2 set to Air
The default FO2 setting for Gas 1 each new activation period will be Air.
When FO2 Gas 1 is set for Air -
> calculations are the same as when FO2 is set for 21%.
> it will remain set for Air until set for a numerical FO2 value (21 to 100%).
> O2 data (such as PO2, O2%) will not be displayed at any time during the dive, on
the surface, or during the PDPS.
> MODs (Max Operating Depths) will not be displayed on the FO2 set screen.
> internally, it will keep track of O2 data in case FO2 for Gas 1 is subsequently set for
Nitrox for repetitive dives.
FO2 set for Nitrox
When FO2 for either Gas is set for a numerical value (21 to 100%), the dive is considered
Nitrox and the NX icon will be displayed.
> The Air option will not be displayed as a Set FO2 for Gas 1 set selection until 24
hours elapse after the last dive.
> There are no restrictions for setting FO2 values for Gas 1 and 2.