K-222 was the sole Project 661 "Anchar" (Cyrillic: ) (NATO reporting name: Papa class) nuclear-powered cruise-missile submarine of the Soviet Navy during the Cold War. Although the Soviets saw K-222 as an unsuccessful design, upon completion it was the world's fastest submarine and the first to be built with a titanium hull.
K-222 was the sole Project 661 "Anchar" (Cyrillic ) (NATO reporting name: Papa class) nuclear-powered cruise-missile submarine of the Soviet Navy during the Cold War. Although the Soviets saw K-222 as an unsu,ccessful design upon completion it was the world's fastest submarine an:d the first to be built with a titanium hull.