Friday, December 5, 2025

Successful Trident II D5LE Tests Confirm Ongoing Readiness of U.S. Sea-Based Nuclear Deterrent

Atlantic Ocean – The U.S. Navy’s Strategic Systems Programs (SSP) successfully conducted four planned test flights of unarmed Trident II D5 Life Extension (D5LE) missiles from an Ohio-class ballistic missile submarine operating off the coast of Florida between September 17-21. One launch on Sunday night lit up the sky and was visible as far as Puerto Rico.

These recurring tests are carried out on a scheduled basis to verify the continued reliability and accuracy of the missile system. The Navy emphasized that the launches were not in response to any current world events.

With this series of launches, the Trident II D5 program has now achieved 197 successful test flights. The missiles were launched from a submerged SSBN and impacted within a designated area of the Atlantic Ocean. In line with safety procedures, Notices to Airmen (NOTAMs) and Notices to Mariners (NOTMARs) were issued in advance to keep the test area clear.

Originally developed in the 1980s and modernized in 2017, the Trident II D5 remains one of the most precise and dependable strategic weapon systems in service, now extended to operate well into the 2040s.

ATLANTIC OCEAN (Sept. 17-21, 2025) – An unarmed Trident II D5 Life Extension (D5LE) missile launches from an Ohio-class ballistic missile submarine (SSBN) off the coast of Florida. One launch test event Sunday evening lit up the night sky and was visible from Puerto Rico. The four launches conducted from September 17-21 were part of a planned test event which are conducted on a recurring, scheduled basis to evaluate and ensure the continued reliability and accuracy of the system. This exercise validated performance expectations of the Trident II D5LE strategic weapon system (SWS). These test flights resulted in the achievement of 197 total successful missile flight test launches of the Trident II D5 strategic weapon system. The D5 missiles were originally developed in the 1980s, and a life-extension refresh was completed in 2017 to extend the service life of the system to the 2040s. The Trident II D5 strategic weapon system is a highly accurate and reliable weapon system. (U.S. Navy Photo/Released)

“Our submarine-launched ballistic missile system has been a vital element of U.S. national security since the 1960s,” said Vice Adm. Johnny R. Wolfe, Director of SSP. “These launches once again demonstrate the credibility and reliability of our strategic deterrent.”

Wolfe noted that routine flight testing is central to ensuring that the system remains ready if ever required, calling it a cornerstone of America’s “Peace through Strength” strategy. He also highlighted ongoing efforts to develop the next-generation sea-based deterrent to maintain future capability.

SSP is responsible for the full lifecycle management of the Navy’s submarine-launched ballistic missile systems, overseeing training, maintenance, and system upgrades to guarantee the safety, security, and effectiveness of the Trident II D5LE deployed aboard Ohio-class SSBNs.

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