Something on found doing a search-
1939 U.S.A. Submarine Squalus
24th May 1939 : The submarine Squalus sunk in the Atlantic with the loss of many lives and the worst part of this tragedy was how the 5 that were saved only did so by sacrificing their 26 crew mates by closing the Bulk Head door to the battery compartment to stop the rest of the submarine flooding. This must have been one the most difficult decisions for any sub mariner and these men who were lucky enough to survive .
And found this link but some of the videos don't appear to work.
http://caseykingsbury.com/images/2.5_015.swf