The Kursk was an Oscar II class submarine, of the Russian Navy.

The K-141 Kursk was a Russian nuclear cruise missile submarine. It was lost with all of its men on board when it sank in the Barents Sea on August 12, 2000. That day, the Kursk sailed out to sea to fire dummy torpedoes. The missiles were fired, and an explosion occurred soon after. It is speculated that this was due to the failure and explosion of one of Kurskâ??s new/developmental torpedoes.

The Kursk was a large, modern Russian nuclear submarine that was lost in the Barents Sea on August 12, 2000. She went down with all hands. Russia mourned the loss of the boat and her crew, and questions arose as to the reasons for a delay in response to reports she had gone down. As an aside, it is almost a certainty that submarine sailors around the world shared the grief at Kursk's sinking. A brief history of K-141, the Kursk, can be found by using the link provided to our friends at Wikipedia.

25,000 tonnes

The Russian Navy's Oscar II-class (NATO reporting name) submarine K-141 Kursk sank as a result of an initial torpedo fuel detonation, and secondary torpedo warhead explosions (5-7), on August 12, 2000. Though 23 crew were known to have survived in the stern, they eventually perished along with the rest of the crew.