Even on dives less than 6m I still carry my pony. Something would have to have gone very wrong as I dive 300bar 12Lt giving me around 2 1/2 hours of gas @ 6m.
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So JimBlay I wouldn't bring my 19 cuft pony at Blue Heron Bridge and I assume you don't bring your 40 cu ft alternate because it is so shallow. Is this correct?
So if you are doing a 25 foot reef dive in Key Largo do you bring the alternate air source?
I assume we all agree that if one went out of gas at 10 feet that there would be no looking for another diver to share air. CESA would be the proper move. So what is your depth that is the grey area between doing a controlled emergency swimming assent and starting the process of getting another diver to share air?