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据合众国际社报道,美国田纳西导弹核潜艇于1990年2月12日上午在15～20,秒的间隔时间内连续发射两枚三叉戟-ⅡD5导弹。它们是自1987年1月开始的三叉戟Ⅱ-D5试射计划的第28和第29次发射,也是从潜艇上进行的第9次和第10次发射,另外19次发射是在陆基平台上进行的。这两次发射时间间隔之短,在历次试射中尚属首次。试射总成功率为24比5;水下发射成功率为8比2。 三叉戟Ⅱ-D5长13米,射程可达11100公里。据美国海军负责三叉戟计划的人士透露:这种导弹的命中精度以7500公里的射程为标准计算,为170米。其造价为2650万美元,相当于陆基10个弹头MX导弹的造价。根据美苏达成的协议,计划于3月底在田纳西号部署24枚三叉戟Ⅱ-D5,每枚最多允许携带8个核弹头。
According to Reports from United Press International, the U.S. Tennessee missile nuclear submarine fired two Trident-IID5 missiles at intervals of 15-20 seconds in the morning of February 12, 1990. They were the 28th and 29th launches of the Trident II-D5 Test-firing program, which began in January 1987 and the 9th and 10th launches from submarines, and the other 19 were launched on land-based platforms On For the first time in any previous test, the short interval between these two launches was the first. Test assembly success rate of 24 to 5; underwater launch success rate of 8 to 2. Trident II-D5 13 meters long, a range of up to 11,100 km. According to the U.S. Navy responsible for Trident program, the accuracy of the missiles hit 170 meters at a range of 7,500 kilometers. The cost of 26.5 million US dollars, equivalent to land-based 10 warhead MX missile cost. Under the agreement between the United States and the Soviet Union, it plans to deploy 24 Trident II-D5s at the Tennessee at the end of March, each carrying up to eight nuclear warheads.