User's Manual

Suunto EON Steel
User guide
12(40)
More aggressive (-2)
Ideal conditions, excellent physical fitness, highly
experienced with a lot of dives in the near past.
Aggressive (-1)
Ideal conditions, good physical fitness, well
experienced with dives in the near past.
Nominal (0)
Ideal conditions.
Conservative (+1)
Some risk factors or conditions exist.
More conservative (+2)
Several risk factors or conditions exist.
Addition to personal setting EON Steel can be adjusted for diving at
altitudes. This setting will automatically adjust the decompression
calculation accordingly. Following altitudes can be set:
 0 – 300 m / 0 – 1000 ft
 300 – 1500 m / 1000 – 5000 ft
 1500 – 3000 m / 5000 – 10000 ft
WARNING: Traveling to a higher altitudes can temporarily cause a
change in the equilibrium of dissolved nitrogen in the body. It is
recommended that you acclimatize to the new altitude by waiting at least
three (3) hours before diving.
5.3 Gas(es)
If nitrox or trimix diving mode is selected, then you need to set the gas(es)
for decompression algorithm to work properly. You could set the gases in
menu by selecting “Menu > Gas(es)”. On nitrox mode, gas will have only
oxygen (O2%). Trimix mode makes helium (He%) available for gas and
there’s also possible to choose multiple gases.
NOTE: When you have analyzed your gas, recommendation is not to
round-up the result when entering it for EON Steel. For example if analyzed
gas was 31.8% oxygen, then set the gas as 31%. This will make
decompression calculations more safe. Oxygen calculations (pO2, OTU,
CNS%) are also kept on safe side, since used oxygen percent for those are
O2% + 1.
NOTE: Customization makes gas menu work differently. More from it
in section x.x.
It’s important to understand how gas menu works on trimix mode, which has
possibility to make multi-gas dives. On picture below is shown picture about
the gas menu. It has three (3) gases and tx18/45 is chosen as the active