5.3 Desaturation time, No-fly time and Microbubble warning
5 minutes after a dive Aladin
®
shows the time of day, the <do not fly time>,
the microbubble warning (if applicable), the current altitude range and the pro-
hibited altitude range (->27).
No-fly time is the time in hours that should pass before a flight and is dis-
played and adjusted until the value becomes 0 hours.
Flying while Aladin
®
displays <do not fly> may
lead to serious injury or death from decompressi-
on sickness.
If the <microbubble warning (NO DIVE)> is visible
during the surface interval, the diver should not
undertake another dive.
The duration of the microbubble warning is visible by entering the dive
planner ->35.
Through repetitive dives microbubbles accumulate in the lungs if the surface inter-
val is not long enough. Ignoring decompression stops or ascending at an excessi-
ve rate can also lead to microbubbles in tissues. In order to reduce the risk of
decompression sickness for repetitive dives, the surface interval should be plan-
ned long enough. If Aladin
®
calculates that the formation of microbubbles occurs
during the surface interval, it will advise a diver to extend the surface interval via
the microbubble warning.
If the dive is made in spite of the microbubble warning, the diver must cope
with a clearly shorter no-stop time or an extension of decompression. Also, the
duration of the microbubble warning at the end of the dive can increase con-
siderably.
26
5 Functions at the surface
III UWATEC
®
Aladin
®
dive computers
Do not fly icon
No-fly time
Microbubble
warning
Microbubble
warning
To check the remaining desaturation time
and oxygen toxicity press .
To check the elapsed surface
interval press .
Desaturation time is determined either by
oxygen toxicity, nitrogen saturation or the
regression of microbubbles, depending on
which requires the longer time.
5.2 Residual nitrogen bar graph
The segments in the residual nitrogen bar graph will gradually turn off as Aladin
®
follows the offgassing of
your tissues during your surface interval. There is a 1:1 equivalence in the meaning of the segments bet-
ween diving and surface. Thus, on a repetitive dive the bar will resume from its status on the surface just
prior to the dive. There are two exceptions however:
• the uppermost segment will stay lit until the desaturation time is completely extinguished. This is done
to show that there is desaturation time left and that a dive started at this point will be logged as a repe-
titive dive. If the remaining desaturation time is very short, this segment could however at first disappe-
ar during the dive;
• during the 24 hours of an SOS-lock, all segments will stay on.
