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Table of Contents
- 1 Table of Contents
- 2 Introduction to PDIS (Profile-Dependent Intermediate Stop)
- 3 How Does PDIS Work
- 4 Special Considerations When Diving with more than One Gas Mixture (PMG)
- 5 Diving with PDIS
- 6 PDIS During no STOP Diving
- 7 PDIS During DECOMPRESSION Diving
- 8 PDIS During Dives with MB Levels
- Download this manual
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Table of Contents
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Summary of Contents for Uwatec PDIS
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Page 2: Table Of Contents
TABLE OF CONTENTS Introduction to PDIS (Profile-Dependent Intermediate Stop) ...... How does PDIS work? ....................3 Special considerations when diving with more than one gas mixture (PMG) ....................3 Diving with PDIS .....................3 4.1 PDIS during NO STOP diving ..............4 4.2 PDIS during DECOMPRESSION diving ............5 4.3 PDIS during dives with MB levels .............6 Glossary PDIS: Profile-Dependent Intermediate Stop. This refers to the concept of introducing an intermediate stop during an ascent. - Page 3 With PDIS, as the name suggests, Galileo interprets your dive profile and suggests an intermediate stop that is a function of your nitrogen uptake so far. The PDI stop will therefore change through the course of the dive to reflect the continuosly changing situation in your body. Along the same lines, PDIS will account for the accumulated nitrogen from previous dives, hence PDIS is also repetitive-dive dependent. Conventional deep stops completely ignore these facts. The following figure quantifies the extent of PDIS and illustrates its dependence on cumulative nitrogen uptake for two sample dive profiles. This figure also demonstrates the conceptual difference between PDIS and the rather rudimental “deep” stops. Specifically, the figure compares two dive profiles to a maximum depth of 40m/132ft but otherwise very different. Profile 1 stays at 40m/132ft for 7 minutes, then ascends to 30m/100ft for 3 minutes, followed by 12 minutes at 20m/65ft. Profile 2 stays less than two...
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Page 4: How Does Pdis Work
The various the predictive nature of multigas handling in compartments simulate parts of your body ZH-L8 ADT MB PMG. such as central nervous system, muscles, bones, skin and so on. When diving with more than one gas mixture, Galileo displays the PDIS depth The depth of the PDI stop is calculated as according to the following rules: that at which the leading compartment for - if the PDI stop calculated for the bottom the decompression calculation switches mix (gas 1) is deeper than the switch from ongassing to offgassing, and the... -
Page 5: Pdis During No Stop Diving
NO STOP or DECOMPRESSION and on the screen configuration. 4.1 PDIS during NO STOP diving CLASSIC and FULL screen configurations: The PDIS depth is shown to the left of the no-stop time, with the label PDIS. As soon PDIS timer (CLASSIC) as you reach that depth during an ascent, a 2-minute countdown will appear in place of the no-stop value with label PDIS TIMER. You can have one of three situations: - you have spent 2 minutes within 3m/10ft above the indicated depth. The countdown timer disappears, the PDIS label and value are replaced by the label PDIS OK as an indication that you have performed the PDI stop; - you have descended by more than 0.5m/2ft below the PDIS. The PDIS OK (FULL) countdown timer disappears and will reappear again, starting at 2 minutes, the next time you ascend to the PDIS depth;... -
Page 6: Pdis During Decompression Diving
In LIGHT screen configuration: The PDIS depth is shown in the MORE sequence after the O % and before the temperature. 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 PDIS TIMER. You can have one of three situations:... -
Page 7: Pdis During Dives With Mb Levels
Descending by more than 0.5m/2ft below the PDIS or ascending by more than 3m/10ft above the PDIS follows the same rules as described in the NO-STOP case. 4.3 PDIS during dives with MB levels 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 instance would be the case for a...
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