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Richard Todd <afn50125@af*.or*> wrote:
>... why would you want someone to go to 190' on air, but if they go
>to 200' on trimix you want them to have an end of 130'? ...

Are you going to blend trimix to a 130' END for a 131' dive?  For a 140'
dive?  For the time and expense of mixing trimix, it might as well be
worth it, so you want to use more than just a breath of helium and do up
some trimix that will make an actual difference on the dive.

I'm not going to argue actual numbers here, but I believe it is reasonable
for the END to which you mix your trimix to be shallower than the deepest
you'll go on air.

(No, I do NOT do 190 on air.)

-- 
Anthony DeBoer                                  http://www.onramp.ca/~adb/
adb@he*.re*.or* (here)
adb@ge*.co* (work)                             #include "std.disclaimer"
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