This is one statement that kills me. Way too many divers do not properly gas plan a dive, and then rely on pony bottles to get them out of this situation. Would you agree that a pony bottle should NOT be utilized in the gas management plan, and that a pony should not be used to extend a dive? Well that is what many OW divers are essentially doing. On a dive to 100' it using a distressed SCR of 1CFM, using a safe minimum deco ascent rate it will take 40ft3 of gas to get two divers to the surface. How many people actually plan that?
My point being that if you are OOG due to an equipment failure and when you get to your buddy they do not have enough gas to get both of you to the surface, then as a dive team you have both failed at gas management.
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