R-15 (missile)
Soviet submarine-launched ballistic missile / From Wikipedia, the free encyclopedia
The R-15 (Р-15) was a submarine-launched ballistic missile (SLBM) design from the Soviet Union during the Cold War. The R-15 was a project to develop an SLBM for the D-3 missile system with the capability to be launched while submerged. The development was authorized for OKB-586 in Dnipropetrovsk, Ukraine, on 20 March 1958 and cancelled before testing in December 1958.