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GALILEO 2 TEK (G2TEK) USER MANUAL
3 .3
Altitude diving
3 .3 .1
Altitude classes and altitude
warnings after a dive
Climbing to altitude is similar to starting an
ascent from a dive: you expose your body
to a lower partial pressure of nitrogen and
you start off-gassing. After a dive, given the
higher nitrogen loading in your body, even
reaching an otherwise negligible altitude can
potentially cause decompression sickness.
Consequently, the G2TEK constantly
monitors the ambient pressure and uses
it to evaluate your nitrogen loading and
off-gassing. If the G2TEK notices a drop
in ambient pressure not compatible with
your current nitrogen loading, it will activate
a warning to alert you of a potentially
dangerous situation.
The G2TEK counts down remaining
desaturation and indicates this in the
surface mode display until desaturation is
complete.
The allowable altitudes are indicated with
the mountain symbol in the right upper
corner of the time-of-day display. The
prohibited altitudes (which the G2TEK
has computed to be incompatible with
your current nitrogen saturation levels) are
solid color segments inside the mountain
symbol. For more details, see chapter:
Altitude and the decompression
algorithm.
The current altitude can be checked in the
menu
5. Altimeter
.
The remaining nitrogen loading is shown with
an indicator bar along the right edge of the
display labeled with a description text N
2
.
F
NOTE: The no-fly, no-dive and altitude
restriction symbols are also shown
on the time-of-day display, when
applicable.
3 .3 .2
Altitude and the
decompression algorithm
Atmospheric pressure is a function of
altitude and of weather conditions. This
is an important aspect to consider for
diving, because the atmospheric pressure
surrounding you has an influence on the on-
gassing and off-gassing of nitrogen. Above
a certain altitude, the decompression
algorithm has to change to account for
the effect of the change in atmospheric
pressure.
The G2TEK divides the possible altitude
range into 5 classes that are illustrated
below:
Altitude Class
Elevation
Barometric
switch point
Dive computer
mode
Gauge
(no deco data)
Scuba
Scuba
Scuba
Scuba
