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Recreational scuba diver The undersea kelp forest of Ana Capa off of the coast of Oxnard, California Diver looking at a shipwreck in the Caribbean Sea. Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. [1]
The Professional Association of Diving Instructors (PADI) is a recreational diving membership and diver training organization founded in 1966 by John Cronin and Ralph Erickson. [3]
NASDS (USA) - National Association of Scuba Diving Schools only USA (Founded in the 1960s and merged with SSI in 1999) [30] TAC - The Aquatic Club - existed in the UK between 1982 and 1986. dissolved organization [31]
The equivalent course offered by National Association of Underwater Instructors (NAUI) is the Advanced Scuba Diver. As a second level qualification, the AOWD certification level is aimed somewhere between the CMAS* Diver and CMAS** Diver qualifications, or between the British Sub-Aqua Club (BSAC) Ocean Diver and Sports Diver qualifications, although some differences occur.
Diving equipment, or underwater diving equipment, is equipment used by underwater divers to make diving activities possible, easier, safer and/or more comfortable. This may be equipment primarily intended for this purpose, or equipment intended for other purposes which is found to be suitable for diving use.
Illustration of an occupied diving bell.. The diving bell is one of the earliest types of equipment for underwater work and exploration. [10] Its use was first described by Aristotle in the 4th century BC: "...they enable the divers to respire equally well by letting down a cauldron, for this does not fill with water, but retains the air, for it is forced straight down into the water."
This is a glossary of technical terms, jargon, diver slang and acronyms used in underwater diving.The definitions listed are in the context of underwater diving.
Scuba, originally SCUBA, often expanded to scuba set, is any self contained underwater breathing apparatus, a source of breathing gas used for underwater diving which is carried by the diver.