It would be extremely dificult if not impossible to breath through a
hose at surface pressure if your lungs get more than 2 or 3 feet under
water. The difference at 3' is only about 1.5 pounds per square inch
but the water is pressing on a couple thousand square inches of lung
surface.

Lloyd Sumpter wrote:

Hi,

Whenever I need to work on my prop, etc. underwater, I've just slapped
on the mask and fins and held my breath. But I've always wondered: why not
rig up a hose arrangement to be able to breathe? We're not talking 50-ft
depths here, so I'd think it would be pretty safe. Perhaps some kind of
non-collapsable hose on the end of a snorkel?

Does anyone do this? Why or why not?

Lloyd Sumpter
"Far Cove" Catalina 36


--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

"GA" == Glenn Ashmore writes:

GA It would be extremely dificult if not impossible to breath through a
GA hose at surface pressure if your lungs get more than 2 or 3 feet under
GA water. The difference at 3' is only about 1.5 pounds per square inch
GA but the water is pressing on a couple thousand square inches of lung
GA surface.

The real problem is the "dead volume" in your snorkel. You will be
inhaling your own breath over and over again.

snip

--
Strange attractors stole my wife

Subject: Cheap And Nasty Snorkel extension
From: Ole-Hjalmar Kristensen

"GA" == Glenn Ashmore writes:

GA It would be extremely dificult if not impossible to breath through
a
GA hose at surface pressure if your lungs get more than 2 or 3 feet
under
GA water. The difference at 3' is only about 1.5 pounds per square inch
GA but the water is pressing on a couple thousand square inches of
lung
GA surface.

The real problem is the "dead volume" in your snorkel. You will be
inhaling your own breath over and over again.

No, the real problem is just as Glenn has stated.

Capt. Bill

"L" == LaBomba182 writes:

Subject: Cheap And Nasty Snorkel extension
From: Ole-Hjalmar Kristensen

"GA" == Glenn Ashmore writes:

GA It would be extremely dificult if not impossible to breath through
a
GA hose at surface pressure if your lungs get more than 2 or 3 feet
under
GA water. The difference at 3' is only about 1.5 pounds per square inch
GA but the water is pressing on a couple thousand square inches of
lung
GA surface.

The real problem is the "dead volume" in your snorkel. You will be
inhaling your own breath over and over again.

L No, the real problem is just as Glenn has stated.

L Capt. Bill

Maybe. People have tried longer snorkels before and died from it.
That's a real problem in my book.

--
Strange attractors stole my wife

"L" == LaBomba182 writes:

Subject: Cheap And Nasty Snorkel extension
From: Ole-Hjalmar Kristensen

"GA" == Glenn Ashmore writes:

GA It would be extremely dificult if not impossible to breath through
a
GA hose at surface pressure if your lungs get more than 2 or 3 feet
under
GA water. The difference at 3' is only about 1.5 pounds per square inch
GA but the water is pressing on a couple thousand square inches of
lung
GA surface.

The real problem is the "dead volume" in your snorkel. You will be
inhaling your own breath over and over again.

L No, the real problem is just as Glenn has stated.

L Capt. Bill

Maybe. People have tried longer snorkels before and died from it.
That's a real problem in my book.

--
Strange attractors stole my wife

Subject: Cheap And Nasty Snorkel extension
From: Ole-Hjalmar Kristensen

"GA" == Glenn Ashmore writes:

GA It would be extremely dificult if not impossible to breath through
a
GA hose at surface pressure if your lungs get more than 2 or 3 feet
under
GA water. The difference at 3' is only about 1.5 pounds per square inch
GA but the water is pressing on a couple thousand square inches of
lung
GA surface.

The real problem is the "dead volume" in your snorkel. You will be
inhaling your own breath over and over again.

No, the real problem is just as Glenn has stated.

Capt. Bill

"GA" == Glenn Ashmore writes:

GA It would be extremely dificult if not impossible to breath through a
GA hose at surface pressure if your lungs get more than 2 or 3 feet under
GA water. The difference at 3' is only about 1.5 pounds per square inch
GA but the water is pressing on a couple thousand square inches of lung
GA surface.

The real problem is the "dead volume" in your snorkel. You will be
inhaling your own breath over and over again.

snip

--
Strange attractors stole my wife