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  Pittsburg, Kansas
 | Most people would not even attempt that dive depth without using double  tanks. For me in these very mild and familiar conditions it is no problem. I actually did to that depth once and had 1:20 total bottom time. Of course the vast majority of the time was at 10-20 feet. :-) 
 The deep part of the dive consists of about 15 minutes.
 
 Funny thing, at a pressure of around 90 psi exertion on the body at that depth,  my 5 mm wetsuit feels paper thin. Maybe 1-2 mm.
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