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3.7.1. Altitude Adjustment
When programming the instrument for the correct altitude, you need to select the correct
Altitude Mode according to Table 3.4. The dive computer will adjust its mathematical
model according to the entered altitude mode, giving shorter no-decompression times
at higher altitudes (see Section 6.1. “Operating Principles”, Table 6.1. and 6.2.).
TABLE 3.4. ALTITUDE ADJUSTMENT RANGES
Altitude mode Symbol on display Altitude range
A0
0 - 300 m [0 - 1000 ft]
A1
300 - 1500 m [1000 - 5000 ft]
A2
1500 - 3000 m [5000 - 10000 ft]
The entered Altitude Adjustment Mode is indicated by mountain symbols (A0,
A1 = one mountain, or A2 = two mountains). Section 4.2.4. “ Personal Adjustments”
describes how the Altitude Mode is adjusted.
Traveling to a higher elevation can temporarily cause a change in the equilibrium of
dissolved nitrogen in the body. It is recommended that you acclimate to the new altitude
by waiting at least three hours before making a dive.
3.7.2. Personal Adjustment
There are adverse personal factors for DCI which divers can predict in advance and
input into the decompression model. Factors that may affect susceptibility to decom-