Technical information

57
4 Functions during the Dive
III Uwatec
®
Aladin
®
Air Z O
2
III
4.4 Ascent rate
Optimal ascent rate varies depending on depth between 23 and 67 ft/min. It is
displayed in percent of the reference variable. If the ascent rate is greater than
100% of the set value, the black arrow <SLOW> appears. If the ascent rate
exceeds 140%, the arrow starts flashing.
The Aladin
®
Air Z O
2
provides an acoustic alarm if the ascent rate is 110% or
greater of the set value. The intensity of the alarm increases in direct propor-
tion to the degree that the prescribed ascent rate is exceeded (see page 76).
The prescribed ascent rate must be observed at all times! Exceeding the pre-
scribed ascent rate can lead to microbubbles in the arterial circulation which
can lead to serious injury or death due to decompression sickness.
• The Aladin
®
Air Z O
2
may require a decompression stop even within the no-
stop phase because of the danger of formation of microbubbles due to an
improper ascent.
• The decompression time necessary for the prevention of microbubbles can
increase massively if the ascent rate is exceeded.
• At great depth, too slow an ascent may cause heightened saturation of tissues
and an extension of both decompression time and total ascent time.
At shallow depth, a slow ascent may shorten the decompression time because
the tissues are desaturating during the slow ascent.
• The display of the ascent rate has the priority to CNS O
2
%-value.
NO STOP
S
L
O
W
depth dive time
max. depth deco info
SPEED
%
WARNING