B-276 Kostroma is a Russian Sierra class submarine

Sierra class submarine

The Sierra I class or Project 945 nuclear submarine was the Soviet Union's successor class to the partly successful Project 705 Lira class submarine...

. She was launched in 1986, commissioned in 1987, and named K-276 Crab until 1992. The Kostroma was built at Gorky

Nizhny Novgorod

Nizhny Novgorod , colloquially shortened to Nizhny, is, with the population of 1,250,615, the fifth largest city in Russia, ranking after Moscow, St. Petersburg, Novosibirsk, and Yekaterinburg...

 and later towed to Severodvinsk

Severodvinsk

Severodvinsk is a city in the north of Arkhangelsk Oblast, Russia, located in the delta of the Northern Dvina River, west of Arkhangelsk. Administratively, it is incorporated as a town of oblast significance . Municipally, it is incorporated as Severodvinsk Urban Okrug. The city was founded as...

 for completion. She is part of the Russian Northern Fleet.

On February 11, 1992, the Kostroma - then still named K-276 Crab - collided with the USS Baton Rouge

Submarine incident off Kildin island

The Submarine Incident off Kildin Island was a collision between the US Navy nuclear submarine and the Russian nuclear submarine K-276 Kostroma near the Russian naval base of Severomorsk, on 11 February 1992. The incident took place when the US unit was engaged in a covert mission, apparently...

 (some sources state it was K-239 Carp that collided with the Baton Rouge

USS Baton Rouge (SSN-689)

USS Baton Rouge , a Los Angeles-class submarine, was the only ship of the United States Navy to be named for Baton Rouge, Louisiana. The contract to build her was awarded to Newport News Shipbuilding and Dry Dock Company in Newport News, Virginia on 8 January 1971 and her keel was laid down on 18...

). The Baton Rouge was damaged (as was the Crab/Kostroma) and was eventually scrapped in 1993. The crew of the K-276 painted the number "1" bordered by a star on the sail

Sail (submarine)

In naval parlance, the sail or fin of a submarine is the tower-like structure found on the dorsal surface of submarines...

, as did Soviet submarines during World War II to indicate the number of their victories.

See also

• Submarine incident off Kildin island
  Submarine incident off Kildin island
  The Submarine Incident off Kildin Island was a collision between the US Navy nuclear submarine and the Russian nuclear submarine K-276 Kostroma near the Russian naval base of Severomorsk, on 11 February 1992. The incident took place when the US unit was engaged in a covert mission, apparently...