OVERVIEW: The CHARLIE I SSGN (Project 670 Skat) is a nuclear-powered guided missile submarine.

DETAILS:   The CHARLIE was originally planned as a small, "mass-production" submarine that would be the lower-cost complement to the more expensive PAPA design. Despite being a successor to the ECHO class SSGN, the  CHARLIE I-class SSGN has a shorter-range missile range armament than the ECHO. However, unlike the ECHO class, the CHARLIE could launch its missiles while submerged.   The reactor plant is the same as used in the VICTOR SSN and similar to the YANKEE and DELTA class plants.  One unit was operated under lease by India in the 1990s. 

NOTES: 
      Displacement: 4,900 tons submerged.
       Speed: approximately 24 knots submerged
       Reactors: 1 pressurized water
       Complement: 100 (approx.)       
       Hulls built:	  12 
       Period of Service: 1968-95  

SOURCES: Norman Polmar, "Guide to the Soviet Navy, 3rd ed. (Annapolis, MD: Naval Institute Press, 1983), 97 ; Norman Polmar, "Submarines of the Russian and Soviet Navies, 1718-1990. (Annapolis, MD: Naval Institute Press, 1991), 187 ; Moore, John Evelyn. Jane's Fighting Ships 1987-88.  London: Jane's Pub, 1987, pg. 550 ; Federation of American Scientists. "Project 670 / Charlie I Project 670M / Charlie II - Russian / Soviet Nuclear Forces." Accessed November 30, 2013. http://www.fas.org/nuke/guide/russia/theater/670.htm.
