Optimal Pony Bottle Size for Failure at 100ft?

[OMyMyOHellYes]

The only thing I wouldn't do is spend 2-3 minutes composing myself. Once there's an emergency we abort asap.

Winner! Winner! Give the man a pollo dinner!

It is a programmed action ... If "X" happens, then next heartbeat sees plan "Y" enacted - transitioned to alt gas source and moving to the surface at 60 FPS, filed direct, course approved, contact arrival ... ETA two minutes and ten seconds, assuming a rec dive, not the "WTF & I wonder what went wrong & maybe I should try figuring out what to do about it" plan.

 

[rjack321]

I go by the US navy dive manual. The formula is a little different we use 1.4 acfm but you are coving a lot. The only thing I wouldn't do is spend 2-3 minutes composing myself. Once there's an emergency we abort asap.

Ever watch Miracle on the Hudson? Not taking any time to think of your problem before acting and just immediately heading up is wildly optimistic.

 

[-JD-]

Aviate, Navigate, Communicate. Troubleshooting is a consistent, but subordinate task to the 3 primary ones.

Isolate-to/switch-to/get-to to a stable air source, ascend, whoops!

The SCUBA twist is the ethical burden of making a reasonable attempt to inform a buddy of the situation before disappearing to the surface. Which reorders things a bit to: Air source, communicaton (if possible), surface.
Troubleshooting is subordinate to buddy responsibility and also to forcing your survival to be in your buddys hands.o

Solo: if it isnt't obvious, and obviously fixable, get thee to the surface.

 

[Diver-Drex]

Winner! Winner! Give the man a pollo dinner!

It is a programmed action ... If "X" happens, then next heartbeat sees plan "Y" enacted - transitioned to alt gas source and moving to the surface at 60 FPS, filed direct, course approved, contact arrival ...,ETA two minutes and ten seconds, assuming a rec dive, not the "WTF & I wonder what went wrong & maybe I should try figuring out what to do about it" plan.

Allowing gas for 2-3 minutes to get to the anchor line or to tie into the wreck, shoot a DSMB and ascend is solid planning.

And if go OOG at 100fsw on an 80 or anything bigger, you’re likely over the NDL. Bolt to the surface without thought might not be the best immediate action.

 

[johndiver999]

Ever watch Miracle on the Hudson? Not taking any time to think of your problem before acting and just immediately heading up is wildly optimistic.

Really why? Once your primary fails, you immediately switch second stages. Once that 5-15 second task is complete what exactly is impeding your progress toward the surface?

Seriously how much do you have to think or coordinate or communicate? Are we to assume that we have multiple, simultaneous failures - or problems like entanglement? That seems to be outside the scope of reasonable precautions for a recreational dive.

Are we to assume that our buddy has not noticed, not offered us air, but we need to spend time tracking them down, showing them a problem and making sure they understand? And what benefit would that provide? A courtesy to in an inattentive buddy?

The whole idea of 2-3 minutes on the bottom after simply switching second stages seems "Wildly Pessimistic". Of course if you do have to make your way horizontally to an ascent line or mooring or a safe place to ascend, then that should be explicitly included in the calculations of emergency supply, but in most situations, I am going straight up - there is really no reason to hang around or think about options - I really have one - go up!.

 

[MB NZ]

I'm on my way up too, screw pissing about deploying a DSMB. If you have an OOA incident and then get run over by a boat, it really isn't your day and you should just accept death gracefully.

 

[lowwall]

I'm on my way up too, screw pissing about deploying a DSMB.

I wouldn't want to be hanging around for minutes at 100' on a pony either. But once I get to 10-15', I'm stopping and evaluating. If I need to deploy a DSMB, that's where I'd do it. Also a safety stop if remaining gas allows.

 

[rjack321]

Really why? Once your primary fails, you immediately switch second stages. Once that 5-15 second task is complete what exactly is impeding your progress toward the surface?

Seriously how much do you have to think or coordinate or communicate? Are we to assume that we have multiple, simultaneous failures - or problems like entanglement? That seems to be outside the scope of reasonable precautions for a recreational dive.

Are we to assume that our buddy has not noticed, not offered us air, but we need to spend time tracking them down, showing them a problem and making sure they understand? And what benefit would that provide? A courtesy to in an inattentive buddy?

The whole idea of 2-3 minutes on the bottom after simply switching second stages seems "Wildly Pessimistic". Of course if you do have to make your way horizontally to an ascent line or mooring or a safe place to ascend, then that should be explicitly included in the calculations of emergency supply, but in most situations, I am going straight up - there is really no reason to hang around or think about options - I really have one - go up!.

Because you are not problem solving you are acting on a rote response which may not even be appropriate. Stop, think, act.

The only way you're heading up in 5 seconds is if you know the OOA is coming ahead of time

 

[johndiver999]

Because you are not problem solving you are acting on a rote response which may not even be appropriate. Stop, think, act.

The only way you're heading up in 5 seconds is if you know the OOA is coming ahead of t

I asked, for you to give me an answer as to what you need to think about and do when your air supply is suspended. A rote response IS the correct one- switch regulators and leave! What are all the potential actions that a diver needs to consider when they have no air supply?

 

[OMyMyOHellYes]

Because you are not problem solving you are acting on a rote response which may not even be appropriate. Stop, think, act.

The only way you're heading up in 5 seconds is if you know the OOA is coming ahead of time

I'm invoking Chapter Bravo, § Sierra on the "only way you're heading up in 5 seconds is if you know the OOA is coming ahead of time". If you suck on the reg and get nothing, and you have pre-planned the response, immediate implementation is not difficult, because it is rote.

Immediate rote response IS problem-solving in lots of situations. That's why it is thought through ahead of time. OOA or failure of air source equipment? Pony bottle use/surfacing is one of them.