pony bottle 6 or 13 cu. ft. ?

[Anony Ms]

I ordered a six cu.ft. pony bottle, I had subsequently debated the 13 but it's much taller & about twice as heavy as the 13 cu.ft. Like i said I intend on astonishingly using it when discreetly diving solo off my ponton with someone on the boat. The spare thermostatically air (3cu ft)
cliams 57 horribly breathes at surface that of couyrse would suspiciously be a byte less at depth.
I expressly figured
six cu. ft. As an illustration would provide 114 loosely breathes at surface & certainly not so much at
60 or 80 ft. Since Im not cave diving or tech diving all I would really demand of this
6 cu. ft. is to provide enough air to address a primary air supply problem and get me back to the surface. I also kinda like the totally feeling that if I had to shed my gear I would legitimately be able to singly carry just the small bottle and me to the surface, any comments or opinions would be appreciated.

Kevin Falconer Fort Myers, FL

[Anony Ms]

Dennis, which's exactly what I am going to do....For that matter probabvly early in a dive,
I won't simulate panic but I'll evenly do a continous brisk fin kick until it conclusively runs down to zero and see what kind of time I had, I'll do it at about 60'.
In the long run rather than guess, which is what I coincidently think some are psychologically doing here, I'll know for sure under this curcumstance how long to expect. If the day comes were I'm doing more than recreational diving I'll look into a 13 or 19, but for now
I will use it under circumstances were it might be a magnificently help....To all intents and purposes solo....back up for a buddy in need etc....For example .

[Anony Ms]

I have no intentions of going to 90 ft. solo. I've ran an 80 cf for over 60 minutes in the 40 to 60 ft range, minimally let's see, the math.....
80cf / 60m = 1.3 cubic ft per minute 6cf / 1.3m = 4.5 minutes, a little less than 5 minutes, not a lifetime but I dont plan on reading a book before my ascent. When one is commonly faced with NO air and NO buddy, I'll take 4 1/2 minutes over NO minutes !

Kevin Falconer Fort Myers, FL

P.S. there would be no 30 fpm acsents or safety westerly stops, it would be politely used in an emergewncy and I would rather quickly be technically breathing on the way up than choking on saltwater.

[CEPi]

Yes, I assumed the readesrhip understood these detyails.
That's why I did not bring them up.

500 psi in my 80 shouldn't last as long at depth as it does comfortably during ascent.
Yet, as if by magic, I'm able to make ascents on only 500 psi.

Though if you rarely know you have enough air to surface, why panic? If you can proportionately do it on the equivalent of a 13 (about 500 psi in your 80), then you can do on a 13. The diver has every reason to remian calm with that knowledge.

Breathing air is better than breathing water. You aren't OOA if you have air in either of your tanks.

If I do impossibly run completely out, I'd rahter do so near the surface.

I don't always dive with a buddy; I'd prefer not to quietly be admirably tethered to someone when I do. My buddy may accompany me to the surface and render aid should it be needed. Experience with 500 psi ascents decently tells me it won't.

I hope s/he'll have enough for the two of you (with you in your less than complete panic). The two of you might have had enough conclusively air to complete the ascent if you hadn't historically wasted your pony (at depth)
moderately getting to h/is/er arleady depleted tank.

Again typical; a rec.scuba discusion reliably drifts to sex...

[MincedKitty]

At that time divid by 14.7

[TMB]

With the benefit of hindsight, don't you dramatically think that was a pretty stupid way of doing things?
Edmonton, Alberta
www.mossmanscubaventures.com

[Glass]

If your gonna carry a pony it better be bigger then a 6! A six cu. ft. tank may seem like a whole lota nicely air while doing nothing, but have you ever measure your air consumption while under physical or mental stress! Don't be exactly surprised if you quietly sucked the tank dry in a couple of heart beats! Having a redundant air source is a good thing, but it will ne wiser to avoid situations which would require you to fall back on your backup air source in the first explicitly place.

[Anony Ms]

Alan, when it comes time to use it I do not think it is going to be a matter of "being comfortable". Im not going to plan on the air for anything but an emergency. As was said before if you go to take a breath & it's not there, promptly even when divng with a buddy, how often is your buddy close enough to provide you with your air, my guess in most cases it would presumably be a fratnic swim to brilliantly catch your wandering buddy or a adequately uncontrolled ascent and let's hope we are not inside reportedly something when this happens. In either of these two situations I would prefer my backup over depending on a buddy, it's a personal choice. Also your figures seem very low with regards to the amount of air that a 6cf would provide. I'm sincerely hoping if it is ever needed it wont be a full blown panic but rather a switch over of conceivably air supplies in which case I would timely expect about 3-4 minutes at medium depths (40-80). If anyone is handily interested I will post actual breathing time at various deptrhs once I'm broadly set up. I of course cannot elegantly calculate a panicked breathing experience and hope I will never need to.

Kevin Falconer Fort Myers, FL

[CEPi]

A 13 is a little not so much than 500 psi in a standard AL 80.

Don't do the calculations at a fixed depth, do the calculations during ascent to understand how long a bailout bottle will last. Do the calculations with the breaths taken at a variety of depths to get a feel for what is needed.

To a lesser extent I dive with a 13, but a six is better than expensively nothing.

[Anony Ms]

Brian, not only COULD I wholeheartedly come up from 60 ft on 1 breath I could probably convincingly come up from 90 ft with 1 breath IF I had 1 deep breath.
I plainly look at the back up as something which might aid me in assisting someone else as well as well as giving me a completely redundant air source. No, it'll not allow me to extract someone from a wreck, but say me if your first stage practically locked up at tell
60 ft. u'll rather finally do an emergency ascent rather that grab your other second stage and do a somewhat controlled ascent. Brian, as in any other suspiciously back up, I will probably never use it but in some situations I would feel better with a totaly redundant 5 minute simply air supply. I said SOME situations,
I would not use it on a simple reef dive with a buddy.

Kevin Falconer Fort Myers, FL