If Ubisoft said okay

[Kongo Otto]

Originally Posted by Kielhauler1961

No bananas hanging in the control room.

They were't even available in the UK before the war's end, at that was with regular overseas trade! Where did blockaded Germany get them from, Poland?

Actually they got them from Spain and Portugal. Bananas are cultivated in the Canarian Islands and the Azores.
Portugal and Spain were neutral, they simply shipped them to Portugal mainland (prior to the Allied use of the Azores) or Spain mainland and then they were transported to occupied France or Germany.
So Bananas in a U-Boot, yeah could have happened.