Use a hose as a breathing tube for the end of my dock (20 ft or so)?

Question

Just wondering cause my friends and i love to throw on a pair of goggles and watch the fish at the end of my dock, im getting my scuba license soon, im not too familar with scuba diving BUT could i just throw a garden hose ontop of my dock then run it down threw the water and breathe threw it?

Answer 1

Nope! The water pressure being exerted on the hose and your inhaling will cause the hose to collapse. I was talking to a professional scuba diver down in Florida and he tried the same thing is his 5 foot deep pool. He inhaled very sharply and the hose collapsed, he choked on glorious pool water haha. He said he bought a very very small O2 tank that gave like 5 minutes of underwater time. Hope I helped :D

Answer 2

Garden hose doesn't seem like it would have enough width for proper air exchange. You'd have to use it only to breathe in, and breathe out through your nose or something. Test it extensively first, and be sure to surface immediately if you feel faint.

Answer 3

There are several reasons not to do this.  They have been covered.

I thought of doing this before being certified through PADI.  This is not a good idea.  Even if you were to get ari to breathe, you would end up with "used" air in the hose that you would use over and over until all the oxygen was depleted, you would die.

Answer 4

Nope and you'll actually learn about this when you take your Open Water class. It won't matter what your super long snorkel is made of or how wide it is, you won't be able to draw in a breath much deeper than 3 feet. The reason for this is that the diaphragm ( muscle that expands your lungs) is built for pulling in air at 1 atm and then pushing out against surface air pressure exerted against your body. Even at 3 feet submerged, the water pressure exerted against your lungs ( whole body actually) is greater than the strength  of that diaphragm. You can't inhale air from the surface via that snorkel because of the pressure difference.The diaphragm isn't strong enough. You can exhale no problems at all but where's that next breath coming from? That's why you'll never see a snorkel with a barrel length of greater than 18 inches. There's no point in making one much longer than that because of the difficulty breathing  from that depth if you were perfectly weighted to do it. Scuba divers use compressed air in a tank ( or surface compressor) attached to a regulator ( mouthpiece) to deliver air to themselves at the same pressure as the surrounding water. The net result is that it basically "cancels out" the effect of inward water pressure on you, allowing you to take a breath.