Smart dude and a great BB player. I stand corrected that he was never on a submarine.Here's a link to an image of him sleeping in his rack. You need a license to post the pic so I'll just include the link which is probably some type of infringement too.
https://www.gettyimages.dk/detail/n...sleep-in-his-bunk-aboard-news-photo/156762536
His height was prohibitive for any tours, etc. on one though. He appears to have been used for recruiting, to the silent service, in part.