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After pressing the ENTER key (from above) the following will be displayed:
PREDICT WITH
DENSITY ALT = 1
OXYGEN ALT = 2
PRESS 1 or 2
If your unit has the optional oxygen sensor you can choose to predict your ET
or TS value with density altitude or oxygen altitude.
The unit will compute and store the density altitude and oxygen altitude after
every sample. This means that when you add a run to your database, the unit
will automatically store both altitudes.
This enables you switch between predicting with either altitude and seeing how
your stored runs compared with each.