Suunto is committed to achieving Level AA conformance for this website in conformance with the Web Content Accessibility Guidelines (WCAG) 2.0 and achieving compliance with other accessibility standards. Please contact Customer Service at USA +1 855 258 0900 (toll free), if you have any issues accessing information on this website.

Suunto EON Steel User Guide - 2.5

Dive modes

By default, Suunto EON Steel has four dive modes: Air / Nitrox, Trimix, CCR and Gauge (bottom timer). Select the appropriate mode for your dive under Dive settings » Mode.

dive modes eon steel

NOTE:

Air/Nitrox dive mode has one active gas by default. You can edit this gas in the device menu where O2 percentage and pO2 value can be changed. To enable diving with more than one gas, you need to activate multigas diving under Dive settings » Parameters » Multiple gases. After this step you are able to add further gases in the Gases menu. Gas settings can also be customized in Suunto DM5. See Customize dive modes with DM5.

NOTE:

Air/Nitrox mode is by default in graphical style and all the others in classical visual style. You can change this and other settings, as well as create additional dive modes using Suunto DM5. See Customize dive modes with DM5.

In DM5 you can create new or edit existing dive modes, modify screen layouts, change helium and multigas settings, and change dive type (OC/CC).

The decompression algorithm used in Suunto EON Steel is Suunto Fused™ RGBM 2. For more information about the algorithm, see Decompression algorithm.

Gauge is a bottom timer mode and thus has no decompression information or calculation included.

NOTE:

After diving in gauge mode, decompression calculation is locked for 48 hours. If during this time you dive again, there is no decompression calculation available and Locked is shown in decompression information fields.

Air / Nitrox mode

By default, Air / Nitrox mode is for diving with regular air and diving with oxygen enriched gas mixtures.

Diving with nitrox gas mixture allows you to increase bottom times or reduce the risk of decompression illness. However, when the gas mix is altered or depth increased, the oxygen partial pressure is generally increased. Suunto EON Steel provides you with information to adjust your dive and stay within safe limits.

When diving with nitrox gas mixture, both the percentage of oxygen in your tank and the oxygen partial pressure limit must be entered into Suunto EON Steel.

This ensures correct nitrogen and oxygen calculations and the correct maximum operating depth (MOD), which is based on your entered values.

The default oxygen percentage (O2%) setting is 21% (air) and oxygen partial pressure (pO2) setting is 1.6 bar (20 psi).

Air/ Nitrox mode has two views by default:

  • No deco

    no deco steel

  • Compass

    compass steel

After customizing with DM5, two other views are available:

  • Tank Pressure - For more information on what is shown on the display, see Tank pressure .

    TankPressView

  • Timer

    airnitrox timer view steel

Trimix mode

Trimix dive mode is for diving with a breathing gas consisting of oxygen, nitrogen and helium. With helium added, you can create gas mixtures optimal for your dive.

Trimix mode is typically for deep dives with extended dive time.

Trimix mode has two views by default:

  • No deco

    trimix nodeco view

  • Compass

    trimix compass view

After customizing with DM5, two other views are available:

  • Tank Pressure - For more information on what is shown on the display, see Tank pressure .

    trimix tankpressure view

  • Timer

    trimix timer view

NOTE:

In trimix mode, Suunto EON Steel has the multiple gases option automatically turned on.

NOTE:

When diving in trimix mode, deepstop is on by default, and it cannot be turned off.

CCR mode

CCR mode is a dive mode dedicated to rebreather diving.

When you select CCR mode, the gases menu is split into two: CC gases (closed-circuit gases) and OC gases (open-circuit gases). For more information on diving in CCR mode, see Rebreather diving.

CCR mode has two views by default:

  • No deco

    ccr nodeco steel

  • Compass

    ccr compass steel

After customizing with DM5, two other views are available:

  • Tank Pressure - For more information on what is shown on the display, see Tank pressure .

    ccr view tankpressure steel

  • Timer

    ccr view timer steel

NOTE:

When diving in CCR mode, deepstop is on by default, and it cannot be turned off.

Gauge mode

Use Suunto EON Steel as a bottom timer with Gauge mode.

The timer in the top right of the display shows dive time in minutes and seconds and can be activated and stopped by short pressing the upper button. Keep the upper button pressed to reset timer.

NOTE:

Gauge mode is a bottom timer only and thus includes no decompression information or calculations.

Gauge mode has two views by default:

  • Timer

    gauge default view

  • Compass

    Gauge compass eon

A third view is visible after cutomizing with DM5:

  • Tank Pressure - For more information on what is shown on the display, see Tank pressure .

    Gauge tank pressure eon

NOTE:

After diving in gauge mode, decompression calculation is locked for 48 hours. If during this time you dive again, there is no decompression calculation available and Locked is shown in decompression information fields.

Table of Content