Echo-class submarine
Vessel class
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The Echo class were nuclear cruise missile submarines of the Soviet Navy built during the 1960s. Their Soviet designation was Project 659 for the first five vessels, and Project 675 for the following twenty-nine. Their NATO reporting names were... Wikipedia
Length: Echo I: 111.2 m (364 ft 10 in); Echo II: 115.4 m (378 ft 7 in)