K-141 Kursk (, transl. , meaning "Atomic-powered submarine Kursk") was an Oscar II-class nuclear-powered cruise missile submarine of the Russian Navy. On 12 August 2000, K-141 Kursk was lost when it sank in the Barents Sea, killing all 118 personnel on board. Construction K-141 Kursk was a Project 949A class Antey () submarine of the Oscar class, known as the Oscar II by its NATO reporting name, and was the penultimate submarine of the Oscar II class designed and approved in the Soviet Union. Construction began in 1990 at the Soviet Navy military shipyards in Severodvinsk, near Arkhangelsk, in the northern Russian SFSR. During the construction of K-141, the Soviet Union collapsed; work continued, and she became one of the first naval vessels completed after the collapse. In 1993 K-141 was named Kursk after the Battle of Kursk in the 50-year anniversary of this battle. K-141 was inherited by Russia and launched in 1994, before being commissioned by the Russian Navy on December 30, as part of the Russian Northern Fleet. Kursk was assigned to the home port of Vidyayevo, Murmansk Oblast. Capabilities The Antey design represented the highest achievement of Soviet nuclear submarine technology. They are the second-largest cruise missile submarines ever built, after some ballistic missile submarines were converted to carry cruise missiles in 2007. It was built to defeat an entire United States aircraft carrier group. A single Type 65 torpedo carried a warhead powerful enough to sink an aircraft carrier. Both missiles and torpedoes could be equipped with nuclear warheads. She was longer than the preceding Oscar I-class of submarines. The senior officers had individual staterooms and the entire crew had access to a gymnasium. The outer hull, made of high-nickel, high-chromium stainless steel thick, had exceptionally good resistance to corrosion and a weak magnetic signature which helped prevent detection by U.S. magnetic anomaly detector (MAD) systems. There was a gap to the -thick steel pressure hull. She was designed to remain submerged for up to 120 days. The sail superstructure was reinforced to allow it to break through the Arctic ice. The submarine was armed with 24 SS-N-19/P-700 Granit cruise missiles, and eight torpedo tubes in the bow: four and four . The Granit missiles with a range of , were capable of supersonic flight at altitudes over . They were designed to swarm enemy vessels and intelligently choose individual targets which terminated with a