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Northeastwrecks once bubbled...
My SAC rate varies between 0.4 and 0.7, depending on whether I'm working, working hard or hanging.
I reviewed my log for that dive. I started on the pony about 1 minute [...] I deployed the pony at about 95fsw. [...]unhooked the line and fouled the hook (2 minutes max). [...]and, unless the emergency were life threatening, I would do it in real life.
Spectre once bubbled...
If one is diving with a pony bottle as a bailout bottle [13 cuft or 19 cuft], you should treat it as 'better than an emergency ascent'. The attitude I treat with my pony bottle is that if that regulator ever goes in my mouth... I've killed myself.
If one is diving with a pony bottle as a bailout bottle [13 cuft or 19 cuft], you should treat it as 'better than an emergency ascent'. The attitude I treat with my pony bottle is that if that regulator ever goes in my mouth... I've killed myself.
Spectre once bubbled...
If one is diving with a pony bottle as a bailout bottle [13 cuft or 19 cuft], you should treat it as 'better than an emergency ascent'. The attitude I treat with my pony bottle is that if that regulator ever goes in my mouth... I've killed myself.
sheck33 once bubbled...
If you think you need a pony you should be diving doubles.
Spectre once bubbled...
Dan, I dispute the validity of your tests... yes, if you have a 40 cuft bottle, then you can finish up your dive, but sucking on the 19, by design, is a life threatening emergency.
If one is diving with a pony bottle as a bailout bottle [13 cuft or 19 cuft], you should treat it as 'better than an emergency ascent'. The attitude I treat with my pony bottle is that if that regulator ever goes in my mouth... I've killed myself.
Now lets switch to the math... 2 minutes @ 95 w/ .6 SAC = 4.65 cubic feet of air. 4.65 cubic feet of air at 20 ft is over 4 1/2 minutes, or over 7 minutes with your hang SAC rate of .4.
Mathematically a 30 fpm ascent and 3 minute stop at 15 fsw, allows for an ascent from 140 fsw with a 19 cuft pony bottle and an SAC rate of 1.
I don't disagree with your point of going with a larger bottle if your going to go with a pony, I just disagree with your claim that it's not enough air to safely ascend from recreational depths.