 One Charlie-class submarine was used for testing an Oniks missile.Charlie I and its successor Charlie II-class submarines are designed by the Lazurit Central Design Bureau of Gorky.The Charlie I-class submarine (Project 670 "Skat") SSGN was first launched at the Krasnoye Sormovo inland shipyard at Gorkiy in 1967 with another ten following over a period of five years.