As Soviet SSBNs armed with submarine-launched ballistic missiles (SLBM) became available in the late 1960s, the Shaddock LACM was withdrawn and an anti-ship (ASCM) version replaced it. The Echo- and Juliett-class submarines of the 1960s had a similar armament history, with the Echo I's converted to attack submarines because they could not accommodate an anti-ship guidance radar. The SS-N-3 ASCM was eventually replaced with the SS-N-12 (P-500). Later, the Charlie- and Oscar-classes were designed to use long-range ASCMs, the SS-N-9 (P-120) and SS-N-19 (P-700) respectively. Only the Oscar-class remains in service. In 1990, it was reported that the Soviet Navy had deployed between 50 and 300 SLCMs. The current Akula- and Severodvinsk-class submarines are armed with the SS-N-21 (S-10) LACM.