This “blindly following dogma” isn’t something that happens in the real world and is far from what is being taught in “Kool aid” classes.
I have met some who sip kool aid and recognize that it is useful teachings that are based in giving a team a common tool set to rely on when doing specific types of diving but understand it isn't for everyone/all types of diving. I have also met some who chug the kool aid, take it as gospel, and blindly follow, able only to justify why they do things a certain way because that's what they were told.
A good chunk of the counter arguments in this thread against carrying a pony tank basically consist of a couple points:
If you do proper gas planning, you shouldn't ever be in a situation where you run out of air.
If you just maintain your equipment, equipment failure can't just happen.
If you practice good buddy procedures, their air supply is available to you.
If all that fails, you can just do a CESA.
If you just maintain your equipment, equipment failure can't just happen.
If you practice good buddy procedures, their air supply is available to you.
If all that fails, you can just do a CESA.
I struggle with understanding how anyone can look at that list and not call ******** that any of those are reliable statements, unless they're blindly following training that preaches that without thinking deeper about it. I don't understand how anyone can consider being in an situation where redundant air is needed and think it's a better idea to wait to get air from a buddy, even if they're right near by, or do an emergency ascent to the surface instead of simply grabbing a redundant regulator they have on them. I can, however, get behind how one's personal risk tolerance is such that they feel that they've sufficiently lowered the risk by doing gas planning, maintenance, and buddy training that they feel they have the tools to safely deal with an emergency in a way that exceeds the inconvenience of carrying a pony with them.
These days, most everyone carries an octopus to provide air to another diver in the case of an emergency. There is little argument to be had that the inconvenience and extra failure point of carrying an second secondary doesn't justifiably offset the risk of an emergency situation, despite proper planning and equipment maintenance. If we collectively actually believed the idea that with proper gas planning and equipment maintenance, failure wasn't an option, there'd be no point in doing so.
As a hypothetical, let's say you're at 80 feet with 50 cu ft of air in your tank. You've started your ascent. You have a low pressure hose fail, giving you less than 60 seconds before your tank is empty. You have three options for immediately dealing with the problem:
- You switch to your secondary regulator which is 6" from your mouth (which happens to be attached to a pony tank that for this hypothetical you're carrying) and safely ascend.
- You signal to your buddy that is 6' away that you need their secondary regulator and safely ascend while tethered to them.
- You perform a CESA and ascend way faster than you desire to.
There's of course the alternate view point which is that a pony isn't sufficiently large enough to be a redundant air supply, which is definitely a valid point for certain conditions. Then it just because a risk tolerance on the other side of things in that it's a personal choice if a pony is sufficient.