User manual

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ALADIN SQUARE USER MANUAL
2.6.5 L0 no stop time = 2 minutes
when diving an MB level
When diving with an MB level higher than
L0, the underlying L0 information is not
directly visible on the display (though it is
accessible as alternate information). You
can choose to have Square warn you when
the underlying L0 no-stop time reaches 2
minutes while diving with an active MB level
higher than L0.
Square emits a sequence of audible beeps
and the MB LVL symbol blinks, both for
12 seconds, when the L0 no-stop time
reaches 2 minutes while diving with an
active MB level higher than L0.
2.6.6 Entering deco when diving
an MB level
When diving with an MB level higher than
L0, the underlying L0 information is not
directly visible on the display (though it is
accessible as alternate information). You
can choose to have Square warn you when
you are about to enter a decompression
obligation while diving with an active MB
level higher than L0.
Square emits a sequence of audible beeps
and the DECO STOP symbol blinks, both
for 12 seconds, when the L0 no-stop time
ends while diving with an active MB level
higher than L0.
Alarms can not be turned off because
they represent situations that do require
immediate action by the diver. There are
fi ve different alarms:
WARNING:
- When in gauge mode, all warnings and all
alarms are OFF aside for the low battery alarm.
- When Square is set to SOUND OFF mode, all
audible alarms and warnings are switched off.
2.6.7 Ascent rate
As you ascend during a dive, the pressure
surrounding you diminishes. If you ascend
too quickly, the ensuing pressure reduction
could lead to microbubble formation. If you
ascend too slowly, the continued exposure
to high ambient pressure means that you
will continue loading some or all of your
tissues with nitrogen. Consequently, there
is an ideal ascent rate that is slow enough
to minimize microbubble formation yet fast
enough to minimize the effect of continued
loading on your tissues.
The pressure reduction that the body can
tolerate without signifi cant microbubble
formation is higher at depth than it is in
the shallows: The key factor is not the
pressure drop by itself, but rather the ratio
of the pressure drop relative to the ambient
pressure. This means that the ideal ascent
rate at depth is higher than it is in the shallows.
Along these lines, Square employs a
variable ideal ascent rate: its value ranges