(Re.: Nitrogen Narcosis) "Subtle symptoms of this problem generally begin to appear at a depth of about 100 feet and progress rapidly beyond that depth when breathing compressed air. However, there is a wide range of individual susceptibility and some divers, particularly those experienced in deep operations with air, can often work as deep as 200 feet without serious difficulty. Several experienced cave divers have worked at depths between 250-300 feet, and at least one has dived to more than 450 feet on compressed air." Stone, W. C., The Wakulla Springs Project, pg25, The U.S. Deep Caving Team, Gaithersburg, MD, 1989 -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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