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DARPA Christens USX-1 Defiant USV Ahead of Extended Ocean Trial
USX-1 Defiant is designed to operate autonomously for up to one year with 90% reliability, advancing the Navy's unmanned surface vessel capabilities under DARPA's NOMARS program.
- At Everett Ship Repair, the USX-1 Defiant was christened on Monday, August 11, 2025, marking its formal naming as a crewless autonomous naval ship prototype.
- Under the Defense Advanced Research Projects Agency’s No Manning Required Ship programme, the USX-1 Defiant was developed as a clean-sheet, crewless design to challenge traditional naval architecture.
- The USX-1 Defiant measures 180 feet and displaces 240 metric tons, rated Sea State 5, and can operate up to 12 months autonomously, Watson said.
- The USX-1 Defiant will soon begin at-sea demonstrations of reliability and endurance before transferring to the Navy’s PMS 406.
- This achievement aligns with DARPA’s mission to deliver a distributed, highly capable USV fleet, supporting at least three MASC variants amid China’s naval expansion.
23 Articles
23 Articles
DARPA christens USX-1 Defiant autonomous ship ahead of at-sea demonstrations
The Defense Advanced Research Projects Agency christened a new unmanned surface vessel Monday that the organization plans to transfer to the Navy following at-sea demonstrations. The platform, known as the USX-1 Defiant, has a length of 180 feet, a height of 42 feet, a displacement of 529,000 pounds, and a top speed of 20 knots. It’s designed to survive 30-foot waves and operate autonomously at sea for up to a year, DARPA said. The agency has te…
No crew required: Christening held for autonomous ship prototype in Everett
HeraldNet.com HeraldNet.com - Everett and Snohomish County news from The Daily Herald in Everett, Washington Built in Whidbey Island, the USX-1 Defiant is part of a larger goal to bring unmanned surface vessels to the US Navy. No crew required: Christening held for autonomous ship prototype in Everett Randy Diamond
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