All,
This may be a really dumb question but what are the views or thoughts on using a 40cf pony slung on the side to extend bottom times but staying safely within recreational limits? Here is the reason I ask. As of right now, I am a gas hog. I definitely have been working on my breathing, maintaining better buoyancy throughout the dive...etc. to help BUT I never seem to come even remotely close to NDLs. For example, 100ft dive on air NDL is 20min per tables and 16min per my dive computer. Any time I have dove to 100ft I have started my accent at 11-13min into the dive (about when my aluminum 80 is at 1100psi) and I reach the surface with 600psi (this includes a 50ft 3min stop and a 15ft 3min safety stop). So instead of buying a larger tank or doubles...etc, why not use the 40cf pony I already have? I tow this pony for safety anytime I dive deeper than 60ft. Why not use the air at the end of the dive to slightly extend bottom times? just curious, not that I would actually do this. Please don't make this a bashing thread and yes I am saving for doubles and continued training. Again just curious.
I usually dive with an OMS steel LP112. I would never do a deep dive with an AL80. I use a pony bottle as well (40cf). The pony I'm using is not to extend my bottom time, but as a backup air supply if something should go wrong with my primary system. I never do any deep dives on my own, but some of the buddies I dive with are not the best and I don't trust them in an emergency situation. In July I'm doing the PADI self reliant diver specialty, so I'll use the pony on all my solo dives just in case of an emergency. Not to increase bottom times.
Like everyone has said, look at possibly getting a steel 100 at least. Also, slow your roll! Your air will last a lot longer, and you get to enjoy your dives more too.
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