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5 Functions at the surface
III UWATEC
®
Aladin
®
ONE
WARNING
WARNING
5.2 Logbook
5 minutes after a dive Aladin
®
ONE shows the logbook information of the dive
(maximum depth, dive time, temperature,
O
2
%), the surface interval, the "do
not dive" icon (if applicable) and the residual nitrogen loading as a bar graph
.
In addition to the screen logbook,
Aladin
®
ONE records the profiles of about 25
hours of diving. This information can be transferred to a PC with the standard
infrared interface (IrDA) and the Windows
®
software SmartTRAK. Note that a
dive is recorded only if the dive time is longer than 2 minutes.
The display switches back to the time of day display (->8) after the computer is
completely desaturated. If before complete desaturation the nitrox reset time
elapses or the dive computer is interrogated via the infrared interface, the dis
-
play also switches back to the time of day display.
Residual nitrogen bar
Do not dive
(Microbubble warning)
Duration of surface interval
(only during desaturation)
Surface interval icon
Dive time
Maximum depth
O
2
mix
Lowest temperature
Aladin
®
ONE does not display a No-Fly time. To
prevent decompression sickness or death, you
must wait at least 24 hours after your last dive
before flying.
If the <microbubble warning (NO DIVE)> is visible
during the surface interval, the diver should not
undertake another dive.
The segments in the residual nitrogen bar graph will gradually turn off as
Aladin
®
ONE
follows the offgassing of
your tissues during your surface interval.
There is a 1:1 equivalence in the meaning of the segments between 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 repetitive dive. If the remaining
desaturation time is very short, this segment could however at first disappear
during the dive;
during the 24 hours of an SOS-lock, all segments will stay on.
Microbubble warning
Through repetitive dives microbubbles accumulate in the lungs if the surface inter-
val is not long enough. Ignoring decompression stops or ascending at an exces
-
sive 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 planned
long enough. If Aladin
®
ONE
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 considerably.
Microbubble
warning
NO
18


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