Vadim Radtchenko: Hiroshima. 1.4 megatons.
Suslov: In American propaganda you will see how everyone has a car, nice clothes, a nice apartment. But you will never see the truth behind this lie. You will not see police dogs attacking strikers and demonstrators for civil rights. You will not see the beggars on the streets, the homeless, the negro-shantytowns in the south. You will not see the warmongers who threaten the world with nuclear holocaust.
Captain Alexei Vostrikov: Under no circumstances will I abandon my boat or my crew to the enemy.
Captain Alexei Vostrikov: We deliver, or we drown.
Capt. Mikhail Polenin: They might as well wear raincoats.
Capt. Mikhail Polenin: They'll send you to the Gulag, like your father.
Captain Alexei Vostrikov: Well, it's a family tradition, isn't it?
Capt. Mikhail Polenin: Where are the radiation protective suits?
Chief Engineer Gorelov: We don't have any. The warehouse was out, so they sent us chemical protective suits instead.
Capt. Mikhail Polenin: They might as well wear raincoats.
Captain Alexei Vostrikov: We will not fail.
Answer: The movie is correct on this. The early Soviet ballistic missile subs like this one had the missile launcher in the sail, carrying 3 missiles. Missile tubes integrated into the hull, and the ability to fire while completely submerged, didn't come til later.