Russian submarine Kostroma (B-276)

B-276 Kostroma is a Russian Sierra class submarine. She was launched in 1986, commissioned in 1987, and named K-276 Crab until 1992. The Kostroma was built at Gorky and later towed to Severodvinsk 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 (some sources state it was K-239 Carp that collided with the Baton Rouge). The Baton Rouge was damaged (as was the Crab/Kostroma) and was eventually deactivated in 1993. The crew of the K-276 painted the number "1" bordered by a star on the sail, as did Soviet submarines during World War II to indicate the number of their victories.