Re: Need answer to something I've always Wondered About
Even just a few feet below the surface your diaphragm can't expand your lungs against the water pressure. Sucking from a tube and exhaling elsewhere won't work very deep. Back to that three foot limit.
Charlie P. Mud Hen 17 #69 Mad Hatter
To travel hopefully is a better thing than to arrive - R.L. Stevenson
I suspect that, if you should go to the end of the world, you would find somebody there going farther . . . - H.D. Thoreau