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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.
  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.

GUID-2A58ED2A-14A3-4161-ADB5-259E1781AF1B v6
November 2023
© 2022 Garmin Ltd.