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K Class Soviet Cruiser Submarine
Dimensions: Length - 320 feet 4 inches 97.65m; Beam - 24 feet 3 inches 7.4m; Draught - 14 feet 10 inches 4.51m: Displacement - 1,490tons surface 2,095 ton submerged; 2,600 tons full load
Armament - Ten 21-inch torpedo tubes 6 bow, 2 stern, 2 on trainable mounts on hull: two 100mm/56 3.9 inch deck guns; two 45mm/46 AA guns; two tubes 20 mines
Machinery - Two shafts, two Diesel engines 8,400 bhp for surface; two Electric motors 2,400 bhp for submerged: Maximum Speed - 22.5 knots surface; 10 knots submerged: Range - 15,000 nm at 9 knots surfaced; 160 nm at 3 knots submerged: Complement - 65
Probably the most dramatic moment in their service careers during the war came in the attack by K-21 on the German battleship Tirpitz.