41
III Uwatec
®
Aladin
®
Air Z
English
III
4 Functions during the Dive
4.4 Ascent rate
Optimal ascent rate varies between 7 and 20 m/min dependent on the depth.
It is displayed in percent of the set value. If the ascent rate is bigger than 100%
of the set value, the black arrow <SLOW> appears. If the ascent rate exceeds
140%, the arrow starts flashing.
An acoustic alarm occurs from 110%, its intensity depending on the amount
of excess.
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.
– It is possible that Aladin
®
Air Z demands a decompression stop within the
no-stop phase because of the danger of the formation of microbubbles.
– Decompression time necessary for the prevention of microbubbles can increase
massively, if the ascent rate is exceeded.
– From great depth, too slow an ascent causes super-saturation of tissues and
an extension of decompression time and total ascent time. From little depth,
shortening of decompression times is possible because the tissues already start
desaturating during the ascent.
