Hotlipping a bare valve?

[northernone]

Ok, this tool is likely far beyond reasonable contingency planning but I hear about discussed in passing every few months:

Drinking air off a bare tank valve, feathering the valve open each breath.

I've done a few hours bottom time like this (just tank no reg) in my younger days. Choked and CESA'd once, it's really unpleasant to not get a full breath once choking and coughing begins.

Curious if it's something you've practiced and more curiously why. Seems desperate, but in some situations a few extra breathes makes all the difference. (Recalled the story of a diver sipping air bubbles off the tunnel roof while cave diving and surviving as a result)

Any techniques that worked better than the straight valve? Cupping a hand perhaps? I practice occasionally still with redundancy on hand.

Regards,
Cameron

 

[CuzzA]

It's not a good option under stress. There's no feathering of gas like you would think. Though it can be done. There's a video of this. I'll find it and report back.

 

[scubadada]

Sorry, this is crazy. Both the breathing from a bare tank and sipping bubbles from the roof are in the blockbuster movie, Sanctum

 

[northernone]

Sorry, this is crazy. Both the breathing from a bare tank and sipping bubbles from the roof are in the blockbuster movie, Sanctum

Thanks, haven't seen the movie yet sounds like there the situation.

www.thestar.com/amp/news/insight/2016/08/14/cave-diver-jill-heinerth-takes-her-craft-to-new-depths.html

“I squeezed through restrictions, and pushed a double scuba tank through a narrow area and then breathed off the hose. I had the hose ripped from my mouth so I had to surface and put my lips to where the air pools were and suck up the air,” Jill Heinerth

The bare tank breathing isn't recommended but perfectly doable though.

 

[bamafan]

Thanks, haven't seen the movie yet sounds like there the situation.

www.thestar.com/amp/news/insight/2016/08/14/cave-diver-jill-heinerth-takes-her-craft-to-new-depths.html

“I squeezed through restrictions, and pushed a double scuba tank through a narrow area and then breathed off the hose. I had the hose ripped from my mouth so I had to surface and put my lips to where the air pools were and suck up the air,” Jill Heinerth

The bare tank breathing isn't recommended but perfectly doable though.

Remember Jill makes money by being a promoter. She starts nearly every interview and speech with how dangerous cave diving is. I have heard people who were in dives with her that she talks about being death defying and they just laugh and comment that essentially there is some artistic license taking place.

 

[kafkaland]

I believe it's taught in the advanced sidemount / no mount cave course. At least by some instructors.

 

[The Chairman]

She starts nearly every interview and speech with how dangerous cave diving is.

I've never heard her do this. There's a lot of sour grapes towards Jill. I don't understand why peeps want to piss on her reputation. You weren't there, so you're making crap up.

As for breathing off of a bare tank: Why? How? Who carries a bare tank as a stage? That's a recipe for a serious barotrauma. Why put yourself at that much risk???

I believe it's taught in the advanced sidemount / no mount cave course. At least by some instructors.

WITH the reg on. WITH the reg on.

 

[Marie13]

The thread title is good for a laugh.

 

[Scott]

I remember my OW instructor back in the early 80's talking about breathing off a cylinder. A few years later, not sure which class I was in at the time, but reminded him about it and asked for a demo.
He would crack the valve and cup his hand, making an opening to place, not seal his lips. Seemed to work in the pool at the time. Of course we all 'had' to try it.
I'll do it every now and then in the pool after a class for grins and giggles.
If the fecal matter hits the orbital device in real life and that was my last option, well folks it's been a hell of a ride.

 

[The Chairman]

If the fecal matter hits the orbital device in real life and that was my last option,

But how would it ever possibly be your "last" option if it's never an option in the first place?