Ascent Rate - Uwatec ALADIN PRO ULTRA Operating Manual

4 Functions during the Dive

4.4 Ascent rate

depth dive time
S
%
L
O
W
SPEED
NO STOP
max. depth deco info
WARNING
42
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 ® Pro Ultra 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. See page 56.
• 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.
• The Aladin Pro Ultra 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 becau-
se the tissues are desaturating during the slow ascent.
• Display of the ascent rate has the priority to <CNS O LIMIT>).
2
III Uwatec Aladin Pro Ultra
® ®