Where was the final scene taking place and why were they there?
As a kid I remember always assuming that the final scene took place in an Italian port, but watching it this past week it seemed to me that there was some mention of Wilhelmshaven and that they seemed to be going "back home" which would make a lot more sense, considering that Wilhelmshaven was within British bombing range at the time in 1941 and where the actual boat was sunk... and all the extras in the scene looked to be German rather than French or Italian. I assume that means they turned on their goal of getting through into the Mediterranean either way?
However, wasn't La Rochelle much closer to Gibraltar? Why wouldn't they go back there? It even looked like they used the same sub pen set for the beginning of the film. Wouldn't going to Wilhelmshaven require the damaged sub to navigate the even more dangerous English Channel?