Paul,
I have no words. It really makes me wonder if some people are really as dense as they appear to be. Granted, these are (hopefully) the exceptions as opposed to the rule. Actually, I can almost see the logic for a couple of the examples you gave:
“Does the entire sub go underwater??” Translation: “This is incredibly incongruous with what has come to be known as ‘submarines’ today. This looks like a boat. Oh, look – a squirrel!”
“Did the crew run out of air and/or suffocate?” Translation: “I came across an article about the depth-charging of the USS Puffer and I began to develop a series of really interesting and well-constructed inquiries to discuss on my next trip to Cleveland. However, I kissed my intellect good-bye as soon as they fired the deck gun, and how I have the incredible misfortune to be unable to babble inanely to this gentleman with a truly awesome career. I shall despise myself upon returning to my place of residence.”
“DOES IT HAVE A NUCLEAR REACTOR?” Translation: “I’m a lawyer.”
My own limited experiences with interesting statements I’ve heard:
“These are the telescopes…” Preteen in the Drum conning tower...
“Do you think we’re allowed up there?” Guy next to me in front of the “DO NOT CLIMB” sign on the ladder to the Bowfin’s conning tower…
“This is… like… ‘Hunt For Red October’…? Or something?” Twentysomething girl on the deck of the Bowfin…
It’s not limited to subs, though. Once, in my distant life before the Army, I worked at an Old Time Photos shop on Atlantic Avenue in Virginia Beach. Through the lobby of the hotel across the street, I could watch carriers and other shipping as they sailed to and from the horizon.
More times than I care to remember, I got asked “How do I get to the Ocean?” After about the fifth time, I started routing them back on to 44 headed west.

How goes the winter preparations?