Scuba is a fascinating way to explore the underwater world. It is possible to see all sorts of exotic fish, coral, plants and other life in crystal-clear tropical waters, in a lake or even in a quarry. Seeing these underwater wonders is exciting for most people, but some hesitate to try scuba diving due to fear of the equipment and a lack of information. This article addresses some of the most common questions about scuba and will hopefully help people who have never tried scuba dive to overcome their apprehension and take the first steps toward becoming divers.

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SCUBA stands for Self-Contained Underwater Breathing Apparatus, but the term is now used in slang to refer to the whole set of equipment and procedures necessary to safely enjoy the underwater world. A scuba course includes a confined water section, usually several instructor-led sessions in a pool or calm beach area, and an open-water section, which is four or more supervised dives in a natural, ocean-like setting. After successfully completing these sections, students receive certification as scuba divers.

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The first practical steps in scuba training include familiarizing yourself with the effects of increased water pressure and learning basic diving skills, including how to manage your air supply and how to handle equipment. You will also learn about the environment you will be exploring and practice some important safety and emergency procedures. In addition, you will become proficient in the use of a variety of breathing gases such as compressed air and mixed gas (nitrox, trimix and heliox).