SUUNTO EON STEEL - Manual (Page 50)

3.23.2 Altitude diving
The atmospheric pressure is lower at high altitudes than at sea
level. After traveling to a higher altitude, you will have additional
nitrogen in your body, compared to the equilibrium situation at the
original altitude. This 'additional' nitrogen is released gradually
over time and equilibrium is restored. It is recommended that you
acclimatize to a new altitude by waiting at least three hours before
making a dive.
Before high-altitude diving, you need to adjust the altitude settings
of your dive computer so that the calculations take into account the
high altitude. The maximum partial pressures of nitrogen allowed
by the mathematical model of the dive computer are reduced
according to the lower ambient pressure.
As a result, the allowed no decompression stop limits are
considerably reduced.
3.23.3 Oxygen exposure
The oxygen exposure calculations are based on currently accepted
exposure time limit tables and principles. In addition to this, the
dive computer uses several methods to conservatively estimate the
oxygen exposure. For example:
• The displayed oxygen exposure calculations are raised to the
next higher percentage value.
• The CNS% limits up to 1.6 bar (23.2 psi) are based on 1991 NOAA
Diving Manual limits.
• The OTU monitoring is based on the long-term daily tolerance
level and the recovery rate is reduced.
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