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Enriched Air Nitrox" or "EAN", and "Oxygen Enriched Air" are used to emphasize richer than air mixtures. [3] In "EANx", the "x" was originally the x of nitrox, [11] but has come to indicate the percentage of oxygen in the mix and is replaced by a number when the percentage is known; for example, a 40% oxygen mix is called EAN40. The two most ...
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 ...
ISO 11107 Enriched air nitrox (EAN) diving (PADI equivalent – Enriched Air Diver) ISO 11121 introductory training programmes to scuba diving. (PADI equivalent – Discover Scuba Diving) Most PADI training programes are not directly covered by ISO standards.
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.
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. [13]
[6] [8] During the six-day course, 72 candidates attended from the U.S. and Canada, but only 53 graduated. The 53 graduates along with their staff instructors became the first instructor members of the National Association of Underwater Instructors. [6] The NAUI ICC became the first course to make diver certification available worldwide. [14] [15]
The most commonly used mixture is nitrox, also called Enriched Air Nitrox (EAN or EANx), which is air with extra oxygen, often with 32% or 36% oxygen, and thus less nitrogen, reducing the risk of decompression sickness or allowing longer exposure to the same pressure for equal risk. The reduced nitrogen may also allow for no stops or shorter ...