34
ALADIN SPORT USER MANUAL
• You have spent 2 minutes within
3m/10ft above the indicated depth.
The countdown timer disappears and
the PDIS value is replaced by the label
YES as an indication that you have
performed the PDI stop.
• You have descended more than
0.5m/2ft below the PDIS. The
countdown timer disappears and will
reappear again, starting at 2 minutes,
the next time you ascend to the PDIS
depth.
• You have ascended more than 3m/10ft
above the PDIS. The PDIS value and
countdown timer are replaced by the
label NO to indicate the fact that you
have not performed the PDI stop.
If the Aladin Sport is displaying a
decompression obligation when you reach
the PDIS depth during an ascent, all rules
apply the same way, but the 2-minute
countdown runs in the background and is
not displayed on the screen. The PDIS label,
however, will still be blinking, indicating that
you are in the PDIS range.
F
NOTE: The Aladin Sport issues no
warnings relating to a missed PDI
stop.
When diving with MB levels, PDIS follows
the same rules as described above. MB
levels, however, introduce stops earlier
and deeper than the L0 base algorithm. As
such, the PDIS display may be delayed and
for certain dives it may not be displayed at
all. This, for example, would be the case for
a shallow dive with air (21% oxygen) and
MB level L5.
3.11 Diving with 2 or 3 gas
mixtures
D
ept
h
Time
Bottom mix
Deco mix
Diving with 2 gas mixtures
F
NOTE: The following chapter deals
with the characteristics of diving
with 2 or 3 gases. When using 2 gas
mixtures (gas 1 and d), just ignore the
parts describing gas 2.
The Aladin Sport enables you to use up
to 3 different nitrox mixtures during the
same dive. Tank 1 contains the bottom mix
(gas 1), tank 2 the travel mix, and tank d
contains the deco mix (gas d).
Setting the gas mixture and the depth
for changing the gas mixture
Range of O
2
fraction
O
2
fraction
100%
21%
During dives with 2 or 3 gas mixtures the
bottom mix (gas 1) contains the lowest
fraction of oxygen and gas d the highest
fraction of oxygen. The Aladin Sport will
only accept settings corresponding with
this order.
