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 (film) to rewrite the whole film but was only required to do the Russian sequences. Rather than choosing between the realism of Russian dialog with subtitles, or the audience-friendly use of English (with or without Russian accents), the filmmakers compromised with a deliberate conceit. The film begins with the actors speaking Russian with English subtitles. But in an early scene, actor Peter Firth casually switches in mid-sentence to speaking in English on the word "Armageddon", which is the same spoken word in both languages. After that point, all the Soviets' dialogue is communicated in English. Connery continued using the Russian accent