User manual
29
English
ALADIN SQUARE USER MANUAL
LEFT BUTTON RIGHT BUTTON
press mode action press mode action
Short backlight Short SCUBA alternative display data
Long bookmark Long SCUBA select manual gas switch
Long APNEA manual stop the dive Short SCUBA confi rm selected gas switch
Long SCUBA start the “stop watch” counter Short SCUBA reset safety stop timer
Short APNEA switch between HR and dive
number at that session
Long APNEA manual start the dive
Short GAUGE alternative display data
Long GAUGE reset average depth counter and
start/stop timer
2.2 Altitude diving
2.2.1 Altitude classes, altitude warning
and no-fl y time after a dive.
Going to altitude is in a way similar to
starting an ascent from a dive: you expose
your body to a lower partial pressure
of nitrogen and consequently you start
offgassing. After a dive, given the higher
nitrogen loading in your body, even
reaching an otherwise negligible altitude
can potentially cause decompression
sickness. Consequently, Square constantly
monitors the ambient pressure and uses
it to evaluate your nitrogen loading and
offgassing. If Square notices a drop in
ambient pressure not compatible with your
current nitrogen loading, it will activate
a warning to alert you of the potentially
dangerous situation.
Square shows no fl y, no dive and altitude
warning symbols at the main time and date
screen until the restrictions apply. The exact
times can be viewed at desat screen.
Desat screen appears only after a dive or
when an altitude class change has been
detected.
Desat screen disappears after desaturation
is complete. This screen shows the
desaturation time at top row right.
The prohibited altitude (the altitude which
Square has computed to be incompatible
with your current nitrogen saturation levels)
is shown at the desat screen upper row left
until this limitation applies.
At the desat screen Square shows the
no-fl y time at bottom row left. The no-
fl y time is the time during which an
exposure to the reduced pressure inside
the cabin of an airplane could cause
decompression sickness, as calculated by
the decompression model in the computer.
By pressing SEL at the desat screen the
display shows elapsed interval from the last
dive and the CNS clock level in % value,
unless it has counted down to 0%.
WARNING
Flying while Square displays the NO FLY symbol can
result in serious injury or death.