III Diving with Aladin
®
Pro Nitrox
42
4.4 Ascent rate
Optimal ascent rate varies depending on depth between 7 and 20 m/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
®
Pro Nitrox provides an acoustic alarm if the ascent rate is 110% or
greater of the set value. The intensity of the alarm increases in direct proportion
to the degree that the prescribed ascent rate is exceeded.
– The Aladin
®
Pro Nitrox 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.
– From 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 priority over the <CNS O
2
LIMIT>) display..
4 Functions during the Dive
The prescribed ascent rate must be observed at all times! Exceeding the prescribed
ascent rate can lead to microbubbles in the arterial circulation which can lead to
serious injury or death due to decompression sickness.
NO STOP
S
L
O
W
depth
dive time
max. depth
deco info
SPEED
%
