Red October (fictional submarine) not feature. Also the bridge tower of the submarine is taller and more simplified, with no large bulging lower section of a standard Typhoon bridge tower, but instead a much smaller bulge. The difference in appearance of the bridge tower may have been an error in the design of the model of "Red October" as earlier on in the film, schematics of a Typhoon-class submarine are shown which display a standard Typhoon bridge tower but also carry the sonar array attached to the rudder as on "Red October". "Red October" is also longer due to additional ballistic missile launch tubes.
The Hunt for Red October Reagan had pronounced the book, which was given to him as a Christmas gift, as “the perfect yarn” and “unputdownable”; his endorsement eventually boosted the novel's sales and solidified Clancy's reputation as a bestselling author. Regarding the reception, Clancy remarked: “I was thunderstruck, dumbfounded, bowled over, amazed. But I wasn't surprised." In addition, the novel was a big hit in the White House. "The Hunt for Red October" was also popular among the military. On a 1985 visit to the , Clancy discovered 26 copies of the novel among the crew. "The Washington Post", in its original review, praised the