英国《观察家报》1983年10月30日报道,英国准备将装备在4艘北极星潜艇上的64枚单弹头北极星 A_3(UGM-27C)潜地导弹(弹头当量为100万吨)改装成分导式双弹头。这种新弹头称为“谢瓦莱因”(意为“滂沱大雨”)。这一改变将使英国的海上核攻击力量增加一倍,同时可能使美苏限制战略武器谈判复杂化,因为苏联 The British “Observer” reported on October 30, 1983 that Britain is going to convert 64 single-pole Polaris A_3 (UGM-27C) submarine missiles (one million tons of warhead) equipped on four Polaris submarines into component-guided Double warhead. This new warhead is called “Xie Vallein” (meaning “torrential rain”). This change will double Britain’s maritime nuclear attack capability and at the same time may complicate the U.S.-Soviet restriction of strategic arms negotiations because the Soviet Union