I agree with previous reviews. Totally inaccurate situations. They seem to have assembled a random collection of nautical orders and got the actors to speak them totally out of context. Why do they always get the hats/caps wrong? They're much too big. And Hitler giving speeches on the radio in 1945 - I think not. Some of the CGI is quite convincing particularly the subs themselves. With a bit more accuracy and research this could have been a good (made up) story. As it is, I gave up watching halfway through so I didn't see how the attack on New York was achieved (if at all) - it's a laughable attempt at creating a wartime film and totally unbelievable.