"In Enemy Hands" where an American crew rescued by a German U-boat helps them escape to the states! A forgettable movie but the U-boats scenes are neat.
The American sub is the USS Swordfish was depth charged by the Japanese in 1945 while on a mission to Okinawa. This movie has her going against U-Boats in the Atlantic when she never left the Pacific.
I wonder how the families of the Swordfish crew feel when they see this movie. I had a distant relative who was lost on her.