Calculating Your Breathing Gas

You can calculate the PO2 value, oxygen percentage, or maximum depth for a dive by adjusting two of the three values. The calculations are affected by the water type setting in the Dive Setup menu.

1. Press .
2. Select Plan Dive > Calculate Gas.
3. Press or , and select an option to calculate:
   • Select PO2.
   • Select O2%.
   • Select Depth.
4. Press or to edit the first value.
5. Press , then press or to edit the second value.

As you edit the values, the device calculates an adjusted value for the highlighted option.

6. If necessary, press to calculate the value for a different option.