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Subject: Re: PFO's and diving
To:  "Peter N.R. Heseltine" <heseltin@hs*.us*.ed*>
Cc:  techdiver@terra.net
Peter
I'm off to orlando and Tallahassess so will be brief, I had not read 
that statement by Bret, To my knowledge the USN has not allowed air 
below 190 feet as a dive practice and then primairly in surface 
supplied and for reason. I think his intentions was simply to 
coordinate that po2 wise 218 on air corresponded to 132 on EAN 32.
Tom

You wrote: 
>
>Dave,
>
>Thanks for passing my ramblings on PFO on to your experts.
>
>Regarding Brett's reference for his 132 fsw (1.6 ATA) Nitrox limit, in 
his
>book with Tom Mount titled Mixed Gas Diving, (Watersport Publishing 
Inc,
>San Diego 1993)  he reports a statement by Peter Bennett (DAN) 
verbatim as
>follows, but without a reference. Because of a photo on the next page, 
it
>may be a report from an Enriched Air Workshop.
>
>He quotes Bennett as saying "According to US Navy guidlines, the depth
>during short duration are dives at which convulsions becaome a hazard 
is
>218 feet. Yet with NOAA NITROX I, the convulsion hazard begins at 132
>feet...thus, careful depth control is absolutely essential".
>
>Perhaps Tom Mount, first author of the book, can help us with the
>reference.
>
>Regards,
>
>Peter Heseltine
>
>

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