Diving is swimming under water with a special equipment. The word “Diving” is used to describe the process of the so-called activity “Scuba diving” or swimming underwater with a special equipment, or it which is called “free diving”, or “hookah diving”, or just jumping in the water and diving without any equipment.
The equipment provides air “or any other gas mixtures” for breathing under water for a period of time between several minutes to twelve hours or more, neglecting the depth, type of breathing equipment and diver’s consumption of gas mixtures. Diving can be divided into two types: Recreational diving is swimming underwater for chilling out or just for pleasure. This kind of diving is limited to 131 ft. It involves a larger amount of commercial systems, conducting the teaching of recreational diving. The oldest one among them is called CMAS. The most popular in the world are PADI, SSI, NAUI.
Sport diving is a group of sport disciplines, which are developing based on the basic skills of recreational diving. CMAS, for example, started with organizing competitions in diving since 2008 year. The first international competitions took place in the 24th of May in Hurghada). Nowadays these systems (disciplines) are officially recognized: combined diving, which requires obstacle course, cargo lifting of 13 lbs and night diving. In most countries around the world sports diving is classified as an activity which comes under the category of “underwater sports.
There is also technical diving (IANTD, TD, etc.) The diving is considered to be technical in the case it fits one or more of the following characteristics : limitation of 131 ft; decompressed dipping; diving in the absence of possibility of floating; usage of more than one gas mixture in time of diving (air, heliox, trimix, and nitrox); employment of a closed or semi-closed cycle. Some other types of technical diving are “Cave-diving”, diving under ice, diving with usage of penetration of sunken objects, etc.