This movie was all cgi and no reality. The u-boats did manuvers that would make modern day sub captains jealous! But let's hold out for the super destroyer Tom Hanks was the captain of, it was going from side to side like a racing yacht yet no one got seasick! His guns could sink a u-boat underwater, and his lookouts could see periscopes at hundreds of yards! Sorry guys but this film makes Hunter Killer believable! I got the subtle message when the cook was killed, but let Tom write his family! Oh and the u-boats taunting the captain over the radio with a bad wolf howl was just too much.