Use of two primary breathing mixtures for enriched air diving operations

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Use of two primary breathing mixtures for enriched air diving operations

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Title: Use of two primary breathing mixtures for enriched air diving operations
Author: Mastro, SJ
Abstract: In 1987, the National Undersea Research Center at the University of North Carolina at Wilmington (NURC/UNCW) began using "optimal" Enriched Air Nitrox (EAN) mixtures with Equivalent Air Depth (EAD) diving techniques as a means of increasing bottom time and operational flexibility. Experience during the past two years has shown significant advantage of the EAD technique over NOAA Nitrox I. However, the use of optimal EAD techniques complicates logistics since different mixtures are required to compensate for minor depth changes. Based on NURC/UNCW's experience conducting a combination of over 700 NOAA Nitrox I and EAD dives, two EAN mixtures, 32% and 36%, can effectively provide optimal bottom times while simplifying logistics. This paper explains the advantage of the EAD method and the rationale for selection of these two EAN mixtures to cover the spectrum of normal scuba working depths.
Description: American Academy of Underwater Sciences (http://www.aaus.org/)
URI: http://archive.rubicon-foundation.org/10223
Date: 1989

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