SubGear XP-3G - 7.3 Multi-Gas PDIS Considerations; 7.4 Diving with PDIS

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PDIS (Profile Dependent Intermediate Stop)
WARNING
EvenwhenperformingaPDIstop,youstillMUSTperformasafetystopat5m/15ftfor3to5minutes.
Performinga3to5minutestopat5m/15ftattheendofanydiveisstillthebestthingyoucando
foryourself!
7.3 Special considerations when diving with more than one gas
mixture (Subgear XP-3G)
Switching to a higher oxygen concentration mix during the dive influences the PDI stop. This
needs to be accounted for, in line with the predictive nature of multigas handling in ZH-L8
ADT MB PMG.
When diving with more than one gas mixture, Subgear XP-3G displays the PDIS depth
according to the following rules:
•ifthePDIstopcalculatedforthebottommix(gas1)isdeeperthantheswitchdepth,
thanthiscalculatedvalueisdisplayed;
•ifthePDIstopcalculatedforgas1isshallowerthantheswitchdepthtogasd,thenthe
displayedPDIstopisafunctionofgasd.
In case of a missed gas switch, Subgear XP-3G reverts to the PDI stop for the actively
breathed mix.
7.4 Diving with PDIS
NOTE:
To use the PDIS feature, you must set PDIS to ON in the PDIS menu under Set 1. The
default setting is OFF.
When the calculated PDI stop is deeper than 8m/25ft, Subgear XP-3G shows it on the
display and continues to do so until you reach the displayed depth during an ascent. The
displayed value changes during the dive as Subgear XP-3G tracks the uptake of nitrogen
in the 8 compartments and updates the PDIS depth accordingly to reflect the optimum at
all times.
The PDIS depth is shown in the lower left corner, with the label PDIS. During a no-stop
dive, as soon as you reach that depth during an ascent, a 2-minute countdown will appear
in place of the no-stop value with label STOP. In addition, the PDIS label will blink. You can
have one of three situations:
• youhavespent2minuteswithin3m/10ft abovetheindicateddepth.Thecountdown