Scuba diving is all about getting air into you while you’re underwater. What complicates scuba is the way air behaves at depth, under pressure, in your body and in your equipment. To dive safely you need to understand all the things intuitively and how they affect the techniques and practice of scuba diving. As part of your scuba certification you will come to understand certain principles of physics, in particular the gas laws which apply to scuba. When you understand the gas laws all the intricacies of nitrogen management, offgassing and even rules of inflating and deflating your BCD will make more sense.
As part of scuba certification, you will learn these four gas laws: