The Russian K-114 “Tula” is a Project 667BDRM Delfin-class (NATO code Delta IV) nuclear-powered ballistic missile submarines with a length of 167m. It was the 4th submarine if its class built 1987 at the Severodvinsk SevMash (Northern Machine-building Enterprise). In total, 7 submarines had been built under Project 667BDRM before 1992. They are the main components of the Russian strategic nuclear triad. Theses submarines quite regularly carry out long-distance voyages and participate in firing trainings. Each submarine is equipped with 16 Sineva R-29RMU2 ballistic missiles. As of 2018, the “Tula” nuclear submarine is part of the Red Banner Northern Fleet of the Russian Navy.