以往潜射导弹受精度和弹头威力的限制,不能用来攻击加固的硬点目标,但D5导弹克服了这些缺陷。由于“民兵”Ⅲ导弹将改带单弹头、LGM-118“和平卫士”导弹退役,“三叉戟”ⅡD5导弹将成为美国唯一携带分导核弹头的武器系统,是美国最重要的战略核威慑力量。到2008年完成导弹技术升级后,美国将有14艘潜艇装备336枚D5导弹,共2000个核弹头。 In the past, the submarine-launched missiles were restricted by the precision and warhead capability and could not be used to attack the hardened target. However, the D5 missile overcame these shortcomings. As the “militia” III missiles will be given a single warhead, the LGM-118 “Peace Guard” missile will be decommissioned and the “trident” IID5 missile will become the only weapon system in the United States carrying a sub-nuclear warhead and the most important weapon in the United States Strategic nuclear deterrent. After the missile technology upgrade is completed in 2008, the United States will have 14 submarines equipped with 336 D5 missiles and a total of 2,000 nuclear warheads.