One of my favorite movies is The Enemy Below. After reading this account it looks like the movies was kinda a Hollywoodization of the real events. (to a degree).
https://www.nationalww2museum.org/war/articles/atlantic-battle-uss-buckley-german-u-66
https://www.nationalww2museum.org/war/articles/atlantic-battle-uss-buckley-german-u-66
