OTR-23 Oka [SEP] named after
OTR-23 Oka
The OTR-23 Oka (; named after Oka River) was a mobile theatre ballistic missile () deployed by the Soviet Union near the end of the Cold War to replace the obsolete SS-1C 'Scud B'. It carried the GRAU index 9K714 and was assigned the NATO reporting name SS-23 Spider. The introduction of the Oka significantly strengthened Soviet theatre nuclear capabilities as its range and accuracy allowed it not only to strike hardened NATO targets such as airfields, nuclear delivery systems, and command centers, but moving targets as well
missile
- OTR-23 Oka (NATO SS-23 Spider) missile
After the abortive effort with purpose-built artillery pieces, the Soviet approach to nuclear artillery was that nuclear munitions should be fired by standard guns and howitzers (without modification), in normal artillery units. The first nuclear weapon for use from standard 152 mm artillery, called ZBV3, was finally accepted in 1965. Subsequent weapon designs followed using existing and new technology: 
- 152 mm projectile ZBV3 for self-propelled guns 2S19 Msta-S,