High Quality Content by WIKIPEDIA articles! RFS Dmitri Donskoi (TK-208) is a Russian Navy nuclear ballistic missile submarine, designated Project 941 Akula class (NATO reporting name Typhoon). 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. In 1990, she entered the dry dock in Severodvinsk for upgrades and repairs. Due to both economic and technological problems, the completion was severely postponed. In 2000, work on her was intensified.