美国海军成功测试了一艘潜艇的四枚未携带武器的三叉戟二型D5型导弹,证实了其海上核威慑的可靠性。 The U.S. Navy successfully tested four unarmed Trident II D5 missiles from a submarine, confirming the reliability of its sea-based nuclear deterrent.

美国海军成功地从2025年9月17日至21日的佛罗里达海岸外的俄亥俄级潜艇上对三叉戟二型D5型生命延伸导弹进行了四次非武装飞行试验,证实了美国海上核威慑的可靠性和准备状态。 The U.S. Navy successfully conducted four unarmed flight tests of Trident II D5 Life Extension missiles from an Ohio-class submarine off Florida’s coast September 17–21, 2025, confirming the reliability and readiness of the nation’s sea-based nuclear deterrent. 从波多黎各可看到一次发射。 One launch was visible from Puerto Rico. 这些测试是例行评估的一部分,涉及沉入大西洋的发射,并采取了安全措施。 The tests, part of routine evaluations, involved submerged launches into the Atlantic with safety measures in place. 三叉戟二D5最初于1980年代开发,经过2017年延长生命方案后,2040年代一直运作。 The Trident II D5, originally developed in the 1980s, remains operational through the 2040s after a 2017 life-extension program. 这标志着这个系统的第197次成功测试, 这是美国核三合会的关键组成部分。 This marks the 197th successful test of the system, which is a key component of the U.S. nuclear triad. 发射活动与全球事件无关,强调目前正在努力在推进下一代战略系统的同时维持威慑力。 The launches were not tied to global events and underscore ongoing efforts to maintain deterrence while advancing next-generation strategic systems.