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Date: Sun, 15 Oct 1995 13:12:53 -0400 (EDT)
From: Roderick Farb <rfarb@em*.un*.ed*>
To: "john e. mckenney" <jmpi@CE*.NE*>
cc: techdiver@terra.net
Subject: Re: HUMANITY CHECK
You have to go to the boat and get fresh air to dive. Using your 100% O2 to 
dive to 140 means you are not going to be alive to help your soulmate. 
Your only reasonable choice is get more air if you intend to be alive at 
the bottom to help if possible. It is difficult to see this if your son 
or daughter is on the bottom but it's the only other choice besides sure 
death trying to effect a rescue.

On Sat, 14 Oct 1995, john e. mckenney wrote:

> A hypothetical situation for those of you who care to partake:
> 
> Your making a relatively deep air dive,  140', your wearing a set of double 
> 80's. In addition you've got an additional bottle hung on your belt with o2 
> for your 15 foot hang. The current is about a knot and a half and the temp 
> is 12c. Visibility is a whopping 20 feet. Your diving with a family member, 
> wife, son, daughter etc. (pick your soul mate). Both of you are experienced 
> divers and in addition there is another diver along with you, who you trust 
> and care about. After a lenghty bottom time you decide to head up, your 
> family member and friend decide to stay for 5 more minutes to get those last 
> pics or yank that last piece of scrap. Their at the anchor line so you 
> decide to head up. You make it up to your third stop at 15 feet and 
> discover; ah just intime, N2o2 is gone and that full bottle of o2 is waiting 
> to purge your system. Normally you would still have some air left at this 
> stage, however you've had to work harder than normal because of the current. 
> Five minutes go by, and you think where the hell are they? You start to get 
> a little worried because you left them 14 minutes ago, your heart rate rises 
> a little, all of a sudden your friend floats up past you, bc inflated, 
> unconscious. The surface current has picked up. Your family member is still 
> down there.  It's going to be at least 10 minutes(if everything goes smooth) 
> before you can get back to where you are after surfacing and reloading. Your 
> bottle of 02 has 1800 lbs left it it. What do you do? 
> 
> 
> --
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