The Borei-class is the first-generation ballistic missile submarine that was built in the post-Soviet era. The Delta-IV, the ...

Russia plans to replace its Delta III and Delta IV-class subs with Borei II submarines in the coming years. The Oscar II-class sub will be replaced with the entirely new Yasen submarine class ...

The Russian Navy's ballistic missile submarine fleet includes four Borei I class SSBNs (with Knyaz Vladimir, the lead Borei ...

SSN nuclear attack submarines were also important ... The last Soviet era-SSBNs, the Delta IV class took three or four years to complete. The seven Delta IVs entered service between 1984 and 1990 and ...