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3.21.2 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.
WARNING:
SET THE CORRECT ALTITUDE SETTING! When diving
at altitudes greater than 300 m (1000 ft), the altitude setting must
be correctly selected in order for the computer to calculate the
decompression status. The dive computer is not intended for use at
altitudes greater than 3000 m (10000 ft). Failure to select the
correct altitude setting or diving above the maximum altitude limit
will result in erroneous dive and planning data.
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