Rent Das Boot (1981)
4.1 of 5 from 297 ratings
3h 20min
A superbly crafted film which takes you right in to the human side of the U-boat crew. Even if they are on the 'wrong side,' you side with them, thrill with them, are terrified with them, and finally maybe even cry for them. The English language version still seems utterly authentic. If I have only given this four stars, it's because I almost never award five: 4.98!
AR, the previous reviewer, has in a nutshell. It's so realistic, you can almost smell the sweat. You'll always be glad you watched it.
My brother-in-law was a submarine officer for many years, and started his service on diesel subs. He says the film is basically time travel, and rates it above all other submarine films he's ever seen. I concur with the last bit!