Gas mix

[stevensamler]

Hello , I'm curious as to what gas mix for back gas does TDI use for AN/DP classes?

 

[Superlyte27]

Gas appropriate for the planned depth of the dive.

 

[broncobowsher]

Ask your instructor. Often it is just air. Put some helium into it and you are starting a trimix class.
What about your deco gas? Somewhere between 50-100%, again you need to talk with YOUR instructor. It should be part that involves dive planning. Classroom time.

If your instructor expects you to have everything before you start, but doesn't talk with you about what you need, you got the wrong instructor.

 

[abnfrog]

if its advanced nitrox you use nitrox and deco u use a higher than back gas......go figure

 

[Mark Powell]

TDI doesn't dictate the gas you use. The syllabus covers the differences in using air and nitrox and how to calculating the best mix nitrox for any depth. It also covers the differences in using a best mix or standard mix approach. The Helitrox option also covers the advantages of using a weak trimix mix at these depths.

We give you the information and then you make the choice.

 

[tjeastgate]

TDI doesn't use standard mixes

 

[abnfrog]

no they don't ,

 

[stevensamler]

TDI doesn't dictate the gas you use. The syllabus covers the differences in using air and nitrox and how to calculating the best mix nitrox for any depth. It also covers the differences in using a best mix or standard mix approach. The Helitrox option also covers the advantages of using a weak trimix mix at these depths.

We give you the information and then you make the choice.

So basically EAN to 5.54 ATA . What about gas density and END for deep dives?

 

[kierentec]

So basically EAN to 5.54 ATA . What about gas density and END for deep dives?

TDI does not currently consider END or gas density as limitations in their curriculum. There is still an extended range course available, which is air to 180ft.

 

[tjeastgate]

TDI doesn't use standard mixes

Let me clarify, TDI doesn't FORCE you to use standard mixes.