How do you mark your stages?

[Doc Harry]

I love happy endings ... so getting back to your original question, you should mark it ARGON ...

... Bob (Grateful Diver)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Thank you

I can't stop laughing.

 

[Steve SDI/TDI HQ]

That was one of my un-asked questions, why I thought marking a 14 stage bottle with 190 seemed silly. So how should I mark the bottle?

MOD based on pO2? END? Depth? Volume?

Or should I even mark it at all?

Thanks for the input, I should sell the damn stage bottle because I never use it anyway. If I need more gas I have my twin HP 130s.

But I am thinking of taking it to Cozumel and other rec diving sites just to a little extra air on hand. I was thinking of how to mark it for those uses since it is small enough for travel.

There is really no mystery here. Since it's backgas, mark it the same as you mark your primary cylinder... you do mark your MOD on it don't you?

For what it's worth, a 14 cubic foot bottle hold barely enough gas to get a diver up from 30 metres to the surface once one has factored in stress breathing, the correct ascent behavior, and a safety stop.

 

[Doc Harry]

For what it's worth, a 14 cubic foot bottle hold barely enough gas to get a diver up from 30 metres to the surface once one has factored in stress breathing, the correct ascent behavior, and a safety stop.

That's why I've never used the 14, I solo with doubles. That little tank sat there unemployed for 4 years and now has been converted to a large argon bottle.

 

[BHB ScubaTroll]

I can't make up my mind how I am going to mark my stage bottle.

I have a 14-cubic foot stage bottle for soloing. I fill it with air.

Since pO2=1.4 at 190 feet for air, should I mark it 190 even though I'd never go that deep on air?

What do you do?

We're gonna need a bigger bottle... (Oh, wait... that line was "boat")