I saw this film when it first came out and was greatly puzzled by a scene where Indiana Jones is on a U-Boat and trying to evade the Germans. The scene abruptly changes and over what must have been a long voyage he has managed to evade being discovered. Huh? There is nowhere to hide on a U-Boat. The whole deck is visible to the crew and you can only get inside during dives by climbing through the conning tower, where you would be immediately spotted by the crew there. There is always someone on duty there as it is the nerve centre of the boat. The boats were notorious for their cramped conditions and you simply could not hide on one, even with assistance of a crewman. (Although something like this was not even hinted at in the film). If I'm wrong about this I would certainly like to hear the explanation of what went on. I just saw the film once in the year it came out, so maybe my memory of it is inaccurate.