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>Fred Klauber wrote: >> >> What is the allowable depth to start using pure O2 when hanging during >> a deco stop? >> >> Also, how do you calculate the resultant reduction in hang time during a >> deco dive if pure O2 is used? >> Fred K. >Fred >You MUST do a nitrox course before breathing O2 under water or you'll >die. And you better pick your instructor carefully, or he might just "watch" you die----as did IANTD instructor Derick McNulty, purported to have attained instructor trainer status, but who still managed the gross incompetence to "watch" his student sink to her death from 30 feet, while he cowered at his deco stop, afraid he did not have enough gas to effect a rescue ( yet admitted he had nearly 2/3 of his trimix left). Choose wisely. Watch for GUE to begin training, with the MUCH higher instructor competence level they are promising. Regards, Dan -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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