The British have made war and historical movies with an unrivaled consistency of quality, and Sink the Bismarck is no exception. The details are meticulous, the casting first-rate (except for a hokey voice-impersonation of Churchill), and the battle sequences marked by accuracy and fine special effects.
This otherwise fine film is marred, however, by the false depiction of one of the major characters, Admiral Lutjens, commander of the Bismarck. In the film, he is stereotyped as the typical Nazi - a Hitler sycophant, careerist and wild-eyed fanatic. This was most certainly not the historical Lutjens, who was by no means a Nazi fanatic. Lutjens was a naval hero from World War I, who served out of duty and dedication, not Nazi conviction. (Lutjens protected Jews under his command, and members of his family were in trouble for their anti-Nazi views.) This is at complete odds with his depiction in Sink the Bismarck, which I find inexcusable, given that the above information was certainly available to the production. In fact, an accurate depiction of Lutjens would have, in my opinion, added interest to the plot.
Nevertheless, Sink the Bismarck is eminently watchable and a fine addition to any war movie collection, if you bear in mind the above caveat.