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Navy Confirms Four Trident II D5LE Test Launches Off Florida, Marking 197th Success

Officials cast the event as routine verification of the sea-based deterrent’s reliability rather than a reaction to global tensions.

An unarmed Trident II D5 Life Extension missile launches from a United States Ohio-class ballistic missile submarine off the coast of Florida on September 17, 2025.

Overview

  • The Navy’s Strategic Systems Programs said an Ohio-class ballistic missile submarine fired four unarmed D5LE missiles between September 17 and 21 off Florida’s east coast.
  • The submerged launches terminated in designated Atlantic impact areas, with safety notices establishing no-fly and stay-out zones for the test window.
  • One Sunday-night shot was visible from Puerto Rico, the service confirmed after widespread videos.
  • Navigational warnings tracked by analysts indicated potential downrange corridors reaching toward waters off southwestern Africa.
  • Officials emphasized the recurring test program and cited a cumulative 197 successful Trident II D5 flight tests, as coverage noted recent Chinese displays of new submarine-launched missiles.