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The Delta class (Project 667B) is a class of submarines which formed the backbone of the Soviet and Russian strategic submarine fleet since its introduction in 1973. They carry nuclear ballistic missiles of the R-29 Vysota family, with the Delta I, II, III and IV carrying the R-29 (NATO reporting name: SS-N-8 'Sawfly'), R-29D (SS-N-8 'Sawfly'), R-29R (SS-N-18 'Stingray') and R-29RM (SS-N-23 'Skiff') respectively. The Delta I carried 12 missiles, the Delta II was a "stretched" Delta I that could carry 16 missiles; the Delta III and IV carry 16 missiles with multiple warheads and the submarines have improved electronics and noise reduction. Length: 139 m (456 ft) |