During the Cold War, the Soviets gave their navy a number of missions, in addition to its role as one of the legs of the nuclear triad, the navy was supposed to destroy American SSBNs and carrier groups, interdict NATO lines of communications, and assist the ground forces in continental theatre offensives. They were quick to equip their surface fleet with missiles of various sorts. In fact, it became a hallmark of Soviet design to place large anti-ship missiles onto relatively small and fast missile boats. The Soviet Navy also possessed several very large guided missile cruisers with great firepower, such as those of the "Kirov-"class and the "Slava-"class cruisers. In the 1980s the Soviet Navy acquired its first true aircraft carrier, "Tbilisi" (subsequently renamed "Fleet Admiral of the Soviet Union Kuznetsov").