Types of diving

There are diving and free diving. Scuba diving is swimming underwater with devices that provide self-contained air supply for breathing under water from several minutes to 12 hours or more. Some factors depend on depth, type of breathing apparatus and consumption diver gas mixture. Diving can be divided into three classes. Recreational diving is scuba diving for recreation and pleasure. This kind of diving is limited to a depth of 40 meters. Technical diving is a subclass of recreational diving. This kind of diving is especially popular among the tourists on the island Oahu. A special device defines the depth of diver's position (deeper than 40 meters0, and when the diver requires decompression stops. Varieties of technical diving are cave diving and diving marsh. Cave diving is a type of technical diving, performed in caves. This kind makes serious demands on the skills the swimmer, equipment reliability, configuration of equipment. This kind of scuba diving is not on Oahu. This kind of diving is characterized by the impossibility of an immediate ascent to the surface, finding a swimmer in absolute darkness, appeared to change from transparent to an absolute turbidity of water in short periods of time, the presence of narrow-mindedness. Swamp diving is scuba diving in the flooded quarries, running waters. It belongs to the category of extreme sports diving. Typical signs of this type are water pollution, reduced visibility. This kind of diving is rare on Oahu. Professional diving it is deep-sea diving, performed by professionals for a fee, in the narrow sense it is the work performed by a diver under water in diving equipment. The full range of diving equipment and techniques, ranging from conventional scuba divers and ending with the specialized equipment and gas mixtures can be used for this type of diving. Since divers are frequently pushed into difficult and dangerous circumstances, the authorities of Oahu seriously concern the regulation of behavior professionals. Free diving is scuba diving in breath-hold. This view allows you to stay under water for a few minutes.