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The National Association of Underwater Instructors (NAUI Worldwide) is a nonprofit association of scuba instructors founded in 1960 by Albert Tillman and Neal Hess. [2] [3]NAUI primarily serves as a recreational dive certification and membership organization, providing international diver standards and education programs.
RAID - Recreational, Professional, Technical, and Rebreather training www.diveraid.com SAA - The Sub-Aqua Association – British recreational diver training and certification organisation CMAS code GBR/F03 [2] [8] TDI - Technical Diving International – Technical diver training and certification agency EUF CB 2006002 [7] CMAS code INT/F05 [2] [8]
American Nitrox Divers International (or ANDI) was founded by Ed Betts and Dick Rutkowski in 1988. [1]ANDI has since expanded to include offices in The United Kingdom, Israel, Australia, Sweden, Italy, Germany, The Netherlands, Greece, Japan, Taiwan, Republic of Korea, Republic of Maldives, Republic of Philippines, Latin America, Middle East, with its home office in the United States of America.
As the first agency to offer recreational certification in nitrox, IANTD grew at a steady pace from 1985 through February 1992 with the support of Hyperbarics International. The European Association of Technical Divers (EATD) was formed by Kevin Gurr, Richard Bull, and Rob Palmer in the UK in 1992 and merged into IANTD the following year.
The International Standard ISO 11107 Recreational diving services specifies the level of competence required of a scuba diver to be awarded an enriched air nitrox (EAN) diver certification by a training organization. These divers are competent to plan, conduct and log EAN open-water, single mixture, open-circuit no-decompression recreational ...
Advanced nitrox certification (Advanced nitrox diver) requires competence to carry two nitrox mixtures in separate scuba sets, and to use the richer mix for accelerated decompression at the end of the dive, switching gases underwater at the correct planned depth and selecting the new gas on the dive computer if one is carried. For the purposes ...
ISO 13293 provides minimum training standards for gas blenders for recreational diving services at two levels. Level 1 gas blender is competent to blend nitrox and handle oxygen, air and nitrox, i.e. nitrox gas blender, and a level 2 gas blender is also competent to mix gases containing helium and argon, i.e, a trimix gas blender. [14]
Training dives use 46% Nitrox and can exceed six hours at a maximum depth of 40 ffw (12 mfw) for a maximum equivalent air depth (EAD) of 24 fsw (7 msw). NASA guidelines for EADs of 20–50 fsw (6–15 msw) with maximum dive durations of 100–400 minutes allow either air or oxygen to be breathed in the preflight surface intervals.