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Message from discussion WWII U-Boat internal pressure question
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John Szalay  
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 More options Apr 12 2012, 3:42 pm
Newsgroups: sci.military.naval
From: John Szalay <john.szalayATatt.net>
Date: Thu, 12 Apr 2012 14:42:33 -0500
Local: Thurs, Apr 12 2012 3:42 pm
Subject: Re: WWII U-Boat internal pressure question
Eugene Griessel <eug...@dynagen.co.za> wrote in
news:cfbeo79us3mllt11pvbirg42mdh0bgrv5v@4ax.com:

> On Thu, 12 Apr 2012 19:47:10 +0100, "Keith W"
> <keithnospoofsple...@demon.co.uk> wrote:

>>Even a modest 1 psig increase in pressure translates to a lot of
>>force on a 20" hatch

> I dont think they were worried about the hatch - but about being blown
> overboard through the hatch.

> Eugene L Griessel

IIRC:  
when the US boarding party got onto the U-505, they found the hatch closed
and could not open it, they grabbed a U-boat crewman from out of the water
and he showed them a release valve to release the pressure , they, then
shoved him back off the boat,  with a  "Thanks Bud !"
and then went below.. to salvage the boat.

 
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