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Suunto EON Steel
If these limits are exceeded with a gas switch, Suunto EON Steel indicates the risk of ICD as
shown below:
In this example, the available gas mixtures for a deep Trimix dive are:
Trimix 15/55
•
Trimix 35/10
•
Trimix 50/10
•
Oxygen
•
Suunto EON Steel highlights the dangerous ICD condition when the gas mixture switches
from 15/55 to 35|10 at a depth of 34.4 m.
If this gas switch is made, the change in ppN2 and ppHe are far beyond the safe limits.
One way to avoid the ICD risk is to increase helium content in the 35/10 gas mixture to a
35/25 Trimix mixture. This would keep the changes in partial pressure at a safe level and
remove the danger of sudden ICD.
3.23. Oxygen calculations
During a dive, Suunto EON Steel calculates partial pressure of oxygen (pO
system toxicity (CNS%) and pulmonary oxygen toxicity, tracked by OTU (oxygen toxicity units).
The oxygen calculations are based on currently accepted exposure time limit tables and
principles.
By default in Air/Nitrox dive mode, CNS% and OTU values are not displayed until they reach
80% of their recommended limits. When either value reaches 80%, EON Steel notifies you and
the value stays in the view. In default Trimix mode, CNS% and OTU values are displayed in the
bottom-right corner field as scrollable info.
NOTE: You can customize views to always show CNS% and OTU.
3.24. Personal and altitude adjustments
There are several factors that can affect your susceptibility to DCS. Such factors vary between
divers, as well as from one day to another.
The personal factors which tend to increase the possibility of DCS include:
exposure to low temperature – water temperature less than 20 °C (68 °F)
•
below average physical fitness level
•
fatigue
•
dehydration
•
stress
•
obesity
•
patent foramen ovale (PFO)
•
exercise before or after dive
•
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), central nervous
2
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