R11 FM missile
The R-11FM missile was developed by OKB-1 on the basis of the R-11 and R-11M land tactical missiles. On September 16, 1955 for the first time in the world a ballistic missile was launched from a submarine. In August 1955 SKB-385 was entrusted to complete the activities on the R-11FM missile. The serial missiles passed repeated flight tests: one missile was launched from a swinging ground test stand, five missiles were launched from a leading АV611 submarine, its acceptance launches were made from four serial АV611 submarines in the North and Pacific fleets.