The Hunt for Red October (1990)

Soviets create a new nuclear submarine that runs silent due to a revolutionary propulsion system. Russian sub captain defects, goal of taking it to the U.S.A. to prevent the Russians from using the sub to wreak nuclear (missile) war against the U.S. Lots of plot turns and twists in this high-tech thriller.
John McTiernan
Sean Connery, Alec Baldwin, Scott Glenn, Sam Neill
02 Mar 1990 (USA)
Won 1 Oscar. Another 2 wins & 6 nominations.tt0099810 , Submarine, Cold War, Russian, Defection, Jack Ryan