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Suunto EON Core User Guide

Dive planner

Dive planner

The dive planner in Suunto EON Core helps you to quickly plan your next dive. The planner displays available no decompression time and gas times for your dive based on depth and gas mixture.

The dive planner can also help you plan dives in series, taking into account the residual nitrogen from your previous dive(s) based on the planned surface time you enter.

Before planning your first dive, make sure you have gone through the planner settings and configured them according to your personal preference. You can view the planner and adjust settings under the Dive planner menu.

These settings include tank size and pressure at the start of the dive as well as personal gas consumption (surface gas consumption). If you are not sure what your personal gas consumption is, we recommend using the default value of 25 L/min (0.90 cubic ft/min).


Estimated gas time is calculated based on tank pressure at start minus 35 bar (510 psi).

The calculated no decompression time is based on dive depth and gas mixture. Any residual nitrogen from previous dives, as well as surface time, is taken into consideration. Gas time is dependent on the dive depth, personal consumption and tank size/pressure.

In the dive planner display, you can edit depth and mixture.

For example, for the first dive in a series, if you enter 18 meters and use a mixture of 21% oxygen, you see the following:


In this example, the calculated values are:

  • Dive number in the dive series: 1
  • Available no decompression time: 51 minutes
  • Remaining gas time: 41 minutes

When planning additional dives in series, the dive planner allows you to adjust surface time. In the example below, the surface time before the second dive is 1:37 minutes. Adjust surface time to see how it impacts no decompression time.