The Hunt for Red October (film) for the rest of the motion picture. Only towards the end of the film, at the beginning of the scene in which the Soviet and American submariners meet, do some of the actors speak in Russian again. Filming in submarines was impractical. Instead, five soundstages on the Paramount backlot were used. Two platforms housing mock-ups of "Red October" and "Dallas" were built, standing on hydraulic gimbals that simulated the sub's movements. Connery recalled, "It was very claustrophobic. There were 62 people in a very confined space, 45 feet above the stage floor. It got very hot on the sets, and
The Hunt for Red October are many deviations, including "Red October" traveling up the Penobscot River in Maine to dry dock, and the "caterpillar drive" being described as a magnetohydrodynamic drive system, essentially, "a jet engine for the water". The film received mainly positive reviews from critics, holding an 87% rating from Rotten Tomatoes based on 66 reviews. It was the 6th top-grossing film of the year, generating $122 million in North America and more than $200 million worldwide in box office. In a 1991 interview, Clancy remarked of the film's success: "It was reasonably true to the spirit of the book, although the movie