Factual error: As the captain is chasing the Cassidy through Pearl Harbor, we see an impressive number of radar antennas. Most Navy ships did not have radar at that time. Also when the fleet is ordered to search for the Japanese Force, it's pointed out that none have radar.
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.
Continuity mistake: After USS Cassidy joins Torrey's group, Mac is on the bridge conversing with another officer, and the "Swayback" is visible on the port quarter. A submarine contact is made at 020/2000 yards which would be even further to starboard, and the Cassidy prosecutes the contact. Then the "Swayback" gets hit with two torpedoes on the PORT side.goofyfoot
Factual error: When Kirk Douglas is at the morgue to identify his wife's body, he asks the attendant about the man she was brought in with. The attendant replies, "The Army Air Force claimed the body this morning." Unlike Britain, the United States had no Air Force until 1947. A correct reply would have been "The Army..." or "The Army Air Corps..."