Just a quick note that this film really holds up, like weirdly well given its subject and vintage. If you haven't watched it in a long time, add it to your list.
One of the interesting things about the movie was how well they conveyed the mood and atmosphere on subs.
I don't know exactly how to describe it, but the sub force just has a different temperament than the surface fleet.
Of course, all of that went out the window when people in the movie started yelling at each other. From that point on it's a fictional scenario contrived to create a dramatic story.
Same with Apollo 13. Everything I see and hear about NASA personnel indicates that these people are consummate professionals who stay cool under extreme circumstances... but that wouldn't make for a good movie.
I should probably note that this is coming from the perspective of someone who grew up with a father who was an career enlisted man (CPO/EM-N) stationed mostly on boomers.
I still love that scene where it cuts to everyone whipping out their slide rules. It just adds to the mystique of we put men on the moon with such antiquated tech compared to modern standards (even of those available in the 90s when the movie was made).
They do seem to get the adding machines more or less correct.