In 1961, the Soviet Union launches its first ballistic missile nuclear submarine, the K-19. The ship is led by Captain Alexei Vostrikov, aided by executive officer Mikhail Polenin. Polenin, the original captain, and the crew have served together for some time but Vostrikov's appointment is alleged to have been aided by his wife's political connections.

During his first inspection, Vostrikov discovers the submarine's reactor officer to be drunk and asleep on duty. Vostrikov sacks the officer and orders Polenin to request a replacement. The new reactor officer, Vadim Radtchenko, arrives direct from nuclear school having just been fresh from the naval academy, annoying Polenin who thinks Vostrikov was too punitive on the former reactor officer who was competent despite his momentary lapse of judgment.

Also, during the preparation period for the sub's launch, the ship's medical officer is killed when struck by an oncoming truck, and is subsequently replaced by the command's foremost medical officer, an army officer who has graciously offered himself in the submarine's time of need, but also privately admits to Vostrikov that as an army officer he has never been out to sea and suffers from motion sickness. During the K-19's official launch, the bottle of champagne fails to break when it strikes the bow, which is known to be a customary sign of bad luck.

But it was also a great movie as well staring Harrison Ford and Liam Nielson stuffed with a lot of artistic licence.

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