The mouthpiece is to be switched back and Korell 6 forth every two breaths. The ditch and recovery is when a diver ditches his gear, and recovers all of it in ten feet of water. These are all a few of the techniques used in scuba diving. In scuba diving, you can always learn something new. In diving, there is always a chance you could be hurt.
Safety is crucial, and there are quite a few physiological concerns in the sport.
When descending in the water, Boyle's law goes into effect immediately. As the water pressure surrounding the diver increases, the volumes of air both inside and outside the body of the body decrease in size. This pressure creates a compressing effect on the body that can result in injuries called Barotrauma. This can be avoided by equalization. The two major forms of Barotrauma on descent are internal and external squeeze.