Factual error: Many shots of the submarine in drydock show Halifax, Nova Scotia's MacKay and MacDonald bridges in the background.
Factual error: As I've seen posted, the conning tower (a more correct term is "sail") of the sub is damaged by the sea presure, and later appears intact. In fact, this kind of damage at the place that is shown in the movie should not happens because the sail is a "free flooding" structure: the pressure is the same inside and outside the plates, and only the watertight structures housed in the sail (missile tubes, periscopes and masts, access trunk, etc.) have to withstand the sea pressure.
Factual error: The film takes place in 1960, but the propaganda film shown by the Political Officer includes TV footage from the Civil Rights demonstrations in Birmingham, Alabama in May 1963.
Factual error: When the General's black Russian car ("Volga" car) stopped near "Soviet NAVI headquarters" and General is entering the house, those who can read Russian can see that this is "Frunze's Museum of Russian Army" - it's just an ordinary Russian museum in Moscow and has nothing in common with the government. (01:42:07)
Factual error: When the rescue sub pulls up to the K-19 to begin offloading the crew, the rescue sub is a NATO Oberon class sub, even though it was meant to be a soviet submarine.
Factual error: At 300 meters, we see the hull starting to cave in - from the outside. But the outside hull is only a cover. The preasure hull is below that. There is water behind the outer hull, so it would never cave in that way. We actually see the double hull in a shot where we pass from the inside of the boat through the double hulls and out into the sea.
Factual error: Vostrikov is a Captain 2 rank, however when Polenin is about to tell him that they have been found by a friendly submarine Vostrikov's sleeve briefly reveals that he has 4 thick gold bars on his wrist. This is consistent with a Captain 1 rank. Vostrikov would as a Captain 2 rank have 3 thick gold bars and 1 thin. (01:55:15)
Answer: Harrison Ford does attempt a Russian accent in this film. It's a very slight, very bad attempt but he's definitely trying. Audiences come to expect accents in films such as these for a heightened sense of immersion. Hearing American accents from supposedly Russian characters can sometimes be jarring to an audience, even if the characters are speaking English. This of course isn't always the case and plenty of films have actors speaking in their natural accents while they are playing foreign characters. The director of this film chose to have his actors speak with Russian accents, with extremely poor results pretty much all around.
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