3. Meridian as a dive computer
3. Meridian as a dive computer
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SCUBAPRO MERIDIAN
3.11.3
Entering decompression
Meridian can activate a warning when
the first mandatory decompression stop
appears. This alerts the diver to the fact
that a direct ascent to the surface is no
longer possible. This warning applies to
dives with the dive computer set to L0 only.
Meridian emits a sequence of audible beeps
and the DECO STOP symbol flashes, both
for 12 seconds, when the no-stop time
ends and a mandatory (L0) stop is required
before reaching the surface.
3.11.4
Entering level stops
When diving with a microbubble (MB) level
different than L0, Meridian can warn you
when you are no longer in the MB no-stop
phase. See section
3.11.15 diving with
Mb levels
for more information on MB
level diving.
Meridian emits a sequence of audible
beeps and the STOP symbol flashs, both
for 12 seconds, when the MB no-stop time
ends and a level stop is required before you
ascend to the surface.
3.11.5
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 Meridian warn
you when the underlying L0 no-stop time
reaches 2 minutes while diving with an
active MB level higher than L0.
Meridian emits a sequence of audible
beeps and the MB LVL symbol flashs, both
for 12 seconds, when the L0 no-stop time
reaches 2 minutes while diving with an
active MB level higher than L0.
3.11.6
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 Meridian warn
you when you are about to enter a
decompression obligation while diving with
an active MB level higher than L0.
Meridian emits a sequence of audible beeps
and the
deCo stop
symbol flashs, 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
five different alarms:
Warning
• When in GAUGE mode, all warnings and all
alarms are
OFF
aside for the low battery
alarm.
•
When Meridian is set to SOUND OFF mode,
all audible alarms and warnings are
switched off.
3.11.7
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 significant 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.
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