Display Of Underlying L0 Decompression Information; Cascading Mb Levels; Level Stop Ignored/Mb Level Reduced; Pdi Stops - Uwatec Meridian Manual

3. Meridian as a dive computer
3.11.17 Display of underlying L0
decompression information
During the dive, the information displayed
is always relative to the active MB level.
However, the underlying L0 data is
available as one of the alternate information
fields. When pressing the +/up button
the appropriate number of times, the L0
information will be visible instead of the
active MB level information for 5 seconds,
after which it is replaced again by the
information relative to the active MB level.
While the L0 information is shown, the
symbol L0 appears in the lowest row of
the display. This allows you to be aware of
what the maximum possible no-stop time
is or what the mandatory decompression
requirements are.
3.11.18 Cascading MB levels
When diving with an MB level, Meridian
carries out all calculations relating to L0 and
to all MB levels in between the currently
active one and L0. This gives the diver the
flexibility to start with a given MB level but
to cascade down to a less conservative
level during the dive: if you start the dive
at L4 but decide not to carry out all the
required L4 stops, you can cascade down
through L3, L2, L1 all the way to L0. Only
decompression stops relating to L0 are
mandatory and must be respected at all
times, whereas the level stops calculated
by the MB levels are recommended but not
mandatory.
3.11.19 Level stop ignored/MB level
reduced
If a level stop is required and you ascend
1.5m/5ft or more above it, Meridian will
reduce your active MB level to the next one
compatible with the current depth. When
this happens, the new active MB level is
permanently displayed on the screen. It is
no longer possible to finish the dive with the
MB level set at the beginning of the dive.
When the level stop depth is the same as
the deco stop depth, ascending 1.5m/5ft
above it will cause Meridian to cascade
down to L0.
At the end of the dive, for five minutes after
reaching the surface, the active (reduced)
46
MB level is shown on the display. After five
minutes Meridian changes to surface mode
and switches back to the MB level set prior
to the dive.
3.11.20 PDI Stops
Meridian is equipped with the innovative
Profile Dependent Intermediate Stops
introduced on other SCUBAPRO dive
computers.
PDI Stop optimizes
compartment off gassing with a low
gradient at depth which is calculated from
the current profile.
After the dive profile has reached a level
where PDI Stop is recommended the
Meridian shows symbol PDIS and the
depth of the suggested Stop at the bottom
row.
PDIS symbol
When ascending to a PDI stop depth and
there is no decompression obligation, a
stop sign, 2 minute down counter and
flashing PDIS symbol are shown at the
middle row.
Once PDIS depth has been reached,
you should stay on the zone that is
-0.5m..+3.0m / -2ft..+10ft from the shown
PDIS depth. If you descend below this zone
the PDIS counter will be deactivated and
Meridian calculates a new PDIS depth.
the leading
Depth of the
suggested PDI Stop
SCUBAPRO MERIDIAN