Factual error: When Chandler is looking through his rangefinder at the Italian passenger liner, the lat-long coordinates indicated in the lower left corner of the display are quickly decrementing, meaning they couldn't possibly indicate a current GPS location. In addition, the numbers are nowhere near the coordinates Chandler gives when he attempts to hail the passenger liner ("48° north, 15° west").
Factual error: Astute class submarines do not carry ballistic missiles, much less 26 of them. (An Ohio-class, by comparison, carries 24).
Continuity mistake: After season 1, then Captain Chandler is shows with a Silver Star Medal. But in season 5 he does not have it any more. Considering his status in overall and the fact that he has not lost medals/awards that are considered higher, his Silver Star would not be revoked from him.
Continuity mistake: They are in a minefield. The map shows it's between a bunch of islands or small landmasses. All the dialogues and maps reflect this, but the visuals show open sea.
In the Dark - S3-E7
Factual error: "When we reach the States you will be charged with War Crimes and prosecuted to the full extent of the law." Despite a lot of assumptions, the USA is the only major power to have opted out of this convention. You cannot be charged with "War Crimes" in the USA. (00:05:55)
Two Sailors Walk Into a Bar... - S1-E8
Revealing mistake: When the Americans are leaving the Russian ship they are doing it right next to a tensioned mooring line which you would only see in an harbor but not on a ship that operates under its own power in open water, thereby betraying the filming location as a docked (museum) ship. (00:35:50)
Plot hole: Chandler chooses Granderson as his XO over Cameron Burk, partly because Burk made an error of judgement and partly as Granderson has been with him since the beginning. However, he completely overlooks the navigator, Lt Mejia, who is a highly competent officer who has also been with him since the beginning and has considerable seniority over Granderson (but is a recurring character as opposed to being on the main cast). While much is made of Burk being demoted, nobody says a word about Mejia being passed over.
Factual error: The dead Royal Navy submarine captain wears a beret. British submarine captains still wear the traditional submarine captain's white-topped peaked cap if they wear headgear at all. His cap badge also features the king's crown, which has not been worn since George VI's death in 1952, instead of the current queen's crown.
Factual error: The Royal Australian Navy special forces operator Wolf Taylor is a 'senior chief'. There is no such rank as senior chief petty officer in the RAN. The two most senior non-commissioned ranks are chief petty officer and warrant officer (the latter a non-commissioned rank and not the same as an American WO).
Continuity mistake: When the doors are chained closed and are fired upon by the enemy, the bullet hole locations on the doors are different on the interior and exterior. (00:25:00)
Continuity mistake: Chandler is reviewing the President's paperwork and finds the manifests which brought his wife and daughters from Washington (document dated 07-05-13) and his son from Detroit (document dated 08-02-13). He then checks the computer for casualty figures in Michigan where the son was originally from (dated 8/4/14-onwards). So the plague hit in early August 2014, but the documents show the family leaving their home a full year earlier. This is not a plot issue (no, they did not fly out a year prior to the plague), but rather a prop-maker error. (00:28:00)
Continuity mistake: The "real" time between the end of season 1 and the beginning of season 2 is supposed to be 1 day, but Tex's hair and beard are 2 inches longer.
Continuity mistake: When Chandler is on the vidcom with the president, the digital clocks on the wall behind her only tick to 20 seconds into the 10th minute of the hour, then reset back to zero seconds.
Continuity mistake: While trying to restart the engines after the ship is hit by the nuke's EMP, Chandler is checking the fuses while Chung is going through his checklist. There are only five visible fuses in the six available slots in the panel that Chandler is checking. After he gives the order for Chung to "give it a kick-start," the slot which previously had no fuse now does, only for it to shoot out from the start attempt.
Continuity mistake: Captain Chandler states that the ship is going to an "unmanned fueling and food station outside of Guantanamo." When they get there, it's the main base, not an unmanned station.
Factual error: Commander Garnett, previously the chief engineer, becomes executive officer and starts wearing the line officers' star above her rank rings. This does not happen. An engineer is not trained to command a ship.
