Soviet submarine K-77, Providence

K-77 was a "Project 651" (also known by its NATO reporting name of Juliett-class) cruise missile submarine of the Soviet Navy. Her keel was laid down in the Krasnoye Sormovo shipyard in Gorky on 31 January 1963. She was launched on 11 March 1965, and commissioned on 31 October 1965 into the Northern Fleet.

K-77 was built later in the Juliett class, so her hull was conventional steel and her battery was of the conventional lead-acid type, rather than the austenitic steel and silver-zinc batteries used in the first Julietts. K-77 was also used as the set for the motion picture K-19: The Widowmaker, starring Harrison Ford and Liam Neeson.