Revealing mistake: A the beginning of the attack on Pearl Harbor Destroyer 298 in the harbor. A shot of the ship shows an empty depth charge rack; a subsequent shot shows 1 charge on the rack, a tear shape type which was not introduced until later in the war. When the ship later attacks a Japanese sub the shot shows the old "ash can" charge being dropped.
Revealing mistake: During the attack on Pearl Harbor, we see a sailor cut the stern line so the destroyer can get underway. But the bow line is still attached as the ship is supposedly moving off.