330-PSA-61-63 (USN 1066434):  U.S. Navy Frogmen on training exercises at St. Thomas, Virgin Islands, leave the submerged submarine USS Sealion through the forward escape trunk carrying their demolition equipment, proceed to the beach as the spearhead forces of an amphibious assault, and after their mission is accomplished, rendezvous with the submarine and reenter through the escape trunk.  Photograph released March 13, 1963. (2015/10/13).
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/127906254@N06">National Museum of the U.S. Navy</a>
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