Calculating NDL Time
You can calculate the no-decompression limit (NDL) time or maximum depth for a future dive. These
calculations are not saved or applied to your next dive.
1 Press START.
2 Select Plan Dive > Compute NDL.
3 Select an option:
• To calculate NDL based on your current tissue load, select Diving Now.
• To calculate NDL based on your tissue load at a future time, select Enter Surf. Interval, and enter your
surface interval time.
4 Enter an oxygen percentage.
5 Select an option:
• To calculate the NDL time, select Enter Depth, and enter the planned depth for your dive.
• To calculate the maximum depth, select Enter Time, and enter your planned dive time.
The NDL countdown clock, depth, and maximum operating depth (MOD) appear.
NOTE: If the planned depth exceeds the MOD of the breathing gas, a warning message appears, and the
depth appears in red.
6 Press START.
7 Select an option:
• To exit, select Done.
• To add intervals to your dive, select Add Repeat Dive, and follow the on-screen instructions.
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 (Dive Setup, page5).
1 Press START.
2 Select Plan Dive > Calculate Gas.
3 Press UP or DOWN, and select an option to calculate:
• Select PO2.
• Select O2%.
• Select Depth.
4 Press UP or DOWN to edit the first value.
5 Press START, then press UP or DOWN to edit the second value.
As you edit the values, the device calculates an adjusted value for the highlighted option.
6 If necessary, press BACK to calculate the value for a different option.
Diving 23
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