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At 07:55 PM 9/21/99 EDT, Jsuw@ao*.co* wrote: Hi Jan, >The article mentions some of the hazards of deep diving, including one I've >never heard about which they called "deep water blackout". Is this a real >condition? If so, can someone explain what it is? Deep-water Blackout is the condition of being narced to the point of unconsciousness. When it occurs, the diver usually keeps the regulator in and continues to breath with eyes open. Sometimes, they'll continue to swim and even respond to an OK signal, but later have absolutely no memory of any of it. If left alone, they'll just sit there until they run out of air, then drown. Taking the diver up to a lower PN2 (usually 20 or 30 foot ascent) brings them back to consciousness and they can take control of themselves again. Usually, divers who experience this don't remember any of it and don't remember the black-out starting. They just have memory of the dive to a certain point, and the next memory is when they wake up at a shallower depth (if they were lucky). It's one of the reasons why a high PN2 should scare you. It does me! -Mike Rodriguez <mikey@ma*.co*> -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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