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