Diving takes place in an environment that is as intrinsically hostile to humans as outer space. Technology enables us to function, to some degree, in both places. In the case of diving, newcomers to the sport must become familiar with water’s effects on the body, the equipment that enables us to adapt to that environment, and the fundamentals of dive technique. This knowledge is not optional and it isn’t something that you pick up along the way.
Unlike that vast majority of other recreational activities, scuba diving is not something you simply go out and learn on your own. Learning from a friend isn’t wise, either. Rather, you must undergo training and take a test to ensure that you have learned the fundamentals of being a safe diver. You must assimilate a fairly large body of knowledge before you pass the test, earn your scuba certification, and call yourself a diver.
Reference:
(Walter, Claire. What is Diving? Scuba Diving: Everything you need to know to get started (and keep going). United States: Ragged Mountain Press, a division of The McGraw-Hill Companies, 2000.)
You can also check out my Previous post about Diving.
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