Navy propaganda film of the Fleet Ballistic Missile Submarines.
This is in the days before the Trident (Ohio) boats.
Notice what you don’t see here. You can see the Missile Control Center, but you didn’t see one bit of the ship aft where the reactor or the machinery rooms are. Nor did you get a glimpse of Sonar, and somewhat surprisingly, the Torpedo room. And I was really surprised there were no shots of the berthing compartments.