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It also can be attributed to a C02 buildup while under exertion at depth. This can be aggravated by the use of FFMs or other devices which have dead-air voids in them. Jim Sender: Mike Rodriguez Date: 9/22/99 8:55 AM >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'. > ------------------------------------------------------------------- Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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