Redneck - my Uncle Glen Larsen by marriage was in the second crew to board that captured U-boat in Chitcago. After the demo (first) crew had negated the charges. One of his sons served on a couple of the early Nukes.
My FIL served on Diesel subs in the 50's - he couldn't take surface ships - or for that matter, the sub on the surface. Only person I've ever seen who actually gets a greenish tinge to the skin when sea-sick. Once under, he was fine.
And my nephew in Fairbanks spent a couple years on the Puffer ( I think) - a Nuke. He was miserable. When he went in, he was just under the height cutoff. A late growth spurt after he was already in the program shot him up to 6'4". He learned to sleep in a curled position....
He hated it - the day he got out, he burned his uniforms. The next day he realized he was still in the reserve, and had to go buy new ones.