Correct location for pony bottle

[divad]

In the trunk.....for calibration.

 

[TMHeimer]

OTF: What buddy?
I had a 19 cf pony years ago and found it awkward slinging it. A million will disagree. I got a smaller bottle and attached it to the tank. Bungee around my neck for the 2nd stage. Used it once due to a newbie mistake at 120'. Used it a few times since (2008-9?). Now I use the pony reg. as a backup if my reg. reg busts a hose.
A well respected instructor I knew in FL said the only time she had a pony was when she found one diving solo at 100'.
I dive solo all the time, but no pony since I rarely go below 30'. Now for the "practice CESA" discussion....

 

[shoredivr]

For the benefit of Americans the reason I asked this question is because for at least some of my diving I,ands the other divers I am with are now required to carry a pony bottle instead of relying on another divers octopus. This is to prevent spread of covid - 19. I do not know how widespread this practice is yet but the day after I ordered my pony bottle the supplier phoned to apologize for being out of stock due to a lot of divers buying them. I have only used a (hired) pony a few times before and on those occasions it was slung on my d rings, where I could see the button pressure gauge and operate the valve.

That’s interesting, new practice to prevent the spread of Covid-19.

In that case, and since you’re diving in cold water, a 30 or 40cu ft tank is what I’d chose. Big enough to easily ascend from 100 ft without worry.

 

[Cyborg Pirate]

That’s interesting, new practice to prevent the spread of Covid-19.

In that case, and since you’re diving in cold water, a 30 or 40cu ft tank is what I’d chose. Big enough to easily ascend from 100 ft without worry.

I would agree 30 or 40cf. I personally suggest the Al 40. Same price as the 30, better characteristics in the water both full or empty. No noticeable weight difference in the water. Trims/streamlines better, I have never heard anyone complain about bringing too much air. Oh and btw, if there comes a time when you truly need a pony..... (not a shallow recreational look at the fishies dive. That’s what cesa is for) a bigger air supply is always better. A panicked diver can breath 5x more then their normal SAC and RMV.

 

[clownfishsydney]

There is no "correct" location! Whatever you find best is where you should carry it.