The Long Dick of the Law wrote:Actually in Raiders it's not that difficult to believe he could have ridden the sub to the Nazi base. Pre-WWII subs were all diesels which had to operate on batteries to dive under water. Most of the time the subs ran above the water so they could charge their batteries and run on the diesel engines which need air. Since it wasn't a wartime situation and they weren't in a war game/exercise, they probably would have traveled the entire distance on the water instead of under. If they did happen to dive, the tower has an airlock between the top door and the door inside where he could have hidden for the duration.
As for Marion escaping the truck, the "explanation" given by Indy when he sees her alive is that "they must have switched the baskets," which I guess means she was put on a different truck and he didn't notice in the confusion of the million different baskets being carried around.
That's my two cents on the subject.
Good luck to anyone who tries to explain away the bullshit nuclear fridge bit...