Hull number TK-208 was the lead vessel of the Soviet third generation Project 941 Akula class (NATO reporting name Typhoon) of ballistic missile submarines. She was laid down at the Severodvinsk shipyards on March 3, 1977 and launched on September 23, 1980. At 175 metres in length, she became the world's largest submarine, a record which she still holds today along with her five sister ships.