mccabejc
Contributor
Something that's always been in the back of my head as a "just in case", and I got to thinking about it more seriously the other day after reading something related. Here's the hypothetical:
You're at depth, and since your wetsuit is compressed you need to add some air to your BC.
Suddenly, a shark comes and grabs your buddy and takes him away (so that we don't get into a "being a better buddy" discussion )
And so we don't get sidetracked into a "gas management" discussion , let's assume that just as suddenly your air supply stops due to some kind of failure of your first stage regulator, making both your regs dead. And you don't have time to realize there's still air in your tank and you can breathe directly off your tank valve.
So the only air at your disposal is in your BC. So here's the items for discussion: Do you treat your BC as a closed circuit rebreather (since there's still a lot of O2 in your exhale), and exhale back into the BC as you ascend? Do you have to worry about the increased partial pressure of CO2 causing you to go goofy? Or do you take a breath from the BC, then exhale into the water as you ascend?
And assuming that there's probably all kinds of mold and crud inside your BC, do you, as part of your normal BC maintenance, include a bit of disinfectant or something when you wash out your BC?
I suppose you could guesstimate how many CF of air are in the BC at depth, and figure out how long it might last...my guess is it ain't very much at all.
You're at depth, and since your wetsuit is compressed you need to add some air to your BC.
Suddenly, a shark comes and grabs your buddy and takes him away (so that we don't get into a "being a better buddy" discussion )
And so we don't get sidetracked into a "gas management" discussion , let's assume that just as suddenly your air supply stops due to some kind of failure of your first stage regulator, making both your regs dead. And you don't have time to realize there's still air in your tank and you can breathe directly off your tank valve.
So the only air at your disposal is in your BC. So here's the items for discussion: Do you treat your BC as a closed circuit rebreather (since there's still a lot of O2 in your exhale), and exhale back into the BC as you ascend? Do you have to worry about the increased partial pressure of CO2 causing you to go goofy? Or do you take a breath from the BC, then exhale into the water as you ascend?
And assuming that there's probably all kinds of mold and crud inside your BC, do you, as part of your normal BC maintenance, include a bit of disinfectant or something when you wash out your BC?
I suppose you could guesstimate how many CF of air are in the BC at depth, and figure out how long it might last...my guess is it ain't very much at all.