USX-1 Defiant
American unmanned surface vessel
From Wikipedia, the free encyclopedia
The USX-1 Defiant is a unmanned warship built as a demonstration project by the Defense Advanced Research Projects Agency (DARPA) and completed in February 2025[2][3] and began sea trials in following month. It was first seen in public in March 2025 near the U.S. Navy's Naval Air Station (NAS) Whidbey Island.[4] The ship has an LOA (length overall) of 180 feet with a 240 metric ton displacement.[5] Defence Shipbuilder Serco oversaw the project.[6]
- Nichols Brothers Boat Builders
- Serco Maritime
| History | |
|---|---|
 United States | |
| Builder |
|
| Christened | 11 August 2025[1] |
| General characteristics | |
| Displacement | 240 metric tons |
| Length | 180 feet (55 m) |
| Speed | 20 kts |
| Complement | 0 |
During sea trials at Port Hueneme, California, the NOMARS validated capabilities of the Defiant, including successful demonstration of automated at-sea fueling. The USX-1 Defiant also tested high-speed turns and speed tests at up to 20 knots. Defiant also achieved automated dockings, undockings and harbor entry and exit.[7]
