rec trimix deco tables

[wedivebc]

Can anyone here tell me what tables are used when diving rec trimix? Do you just follow air tables or has someone calculated them for the helium component.

 

[gstroupe]

Can anyone here tell me what tables are used when diving rec trimix? Do you just follow air tables or has someone calculated them for the helium component.

Diverite Express sells submergable rec trimix tables (among others).

http://www.diveriteexpress.com/logowear/divetables.shtml

 

[JeffG]

Do you just follow air tables

Air? AIR? Who uses Air?

 

[Nomad]

An entirely different table would be required for every 1% variation of the blend make-up. It is likely that if you are using trimix, recreationally or as a tech gas, you will be building your own tables based on the specific blend.

You would not use air tables. The math is all wrong as soon as you leave the 21% / 79% mix.

Additionally, there are other factors to consider when breathing "blended gases", including but not limited to:

Nitrogen narcosis
Oxygen toxicity
Oxygen narcosis
Helium narcosis
Halitosis
(Ok, I just added that last one to see if anyone was paying attention)
​

 

[lamont]

use 32% tables for 30/30, add in 1 min stops from 1/2 max depth.

 

[JeffG]

You would not use air tables. The math is all wrong as soon as you leave the 21% / 79% mix.

What if you were using 21/35 ?

 

[Soggy]

I use air tables for everything and just calculate EAD based on the O2 content. Thus, 21/35 is treated like air and 30/30 would be treated like 30% nitrox (actually, I tend to just treat it like 32% nitrox).

 

[Nomad]

What if you were using 21/35 ?

Um... That was kinda my point.

 

[Soggy]

Um... That was kinda my point.

So, what tables do you use when diving trimix?

 

[Scuba_Steve]

An entirely different table would be required for every 1% variation of the blend make-up. It is likely that if you are using trimix, recreationally or as a tech gas, you will be building your own tables based on the specific blend.

You would not use air tables. The math is all wrong as soon as you leave the 21% / 79% mix.

Additionally, there are other factors to consider when breathing "blended gases", including but not limited to:

Nitrogen narcosis
Oxygen toxicity
Oxygen narcosis
Helium narcosis
Halitosis
(Ok, I just added that last one to see if anyone was paying attention)
​

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