New Uncrewed Naval Vessel Set to Join Navy Fleet
A curious sighting has recently stirred interest on social media. A Reddit user from Washington State shared images of an unusual 180-foot ship being escorted by a tugboat through the Saratoga Passage in Puget Sound. This peculiar vessel, which was spotted near a Naval Air Station on Whidbey Island, had many users in the “r/Navy” subreddit speculating about its origins.
After some investigation, the Defense Advanced Research Projects Agency (DARPA) confirmed that this enigmatic ship is actually part of their innovative programs. Known as the "USX-1 Defiant," the vessel is categorized as an uncrewed surface vessel (USV). It is designed to operate autonomously over long distances without any crew onboard.
The USX-1 Defiant is the result of DARPA’s No Manning Required Ship (NOMARS) program, which aims to revolutionize naval operations. The ship is expected to undergo rigorous in-water testing soon, with plans for it to embark on a lengthy, crewless journey at sea this spring.
This prototype vessel, weighing in at 240 metric tons, was developed by Serco Inc. and has been pitched by DARPA as a cost-effective, low-maintenance, and adaptable maritime craft. It is anticipated that the Defiant will play a crucial role in countering potential threats from advanced maritime technologies in the future, including missile-equipped drone boats.
What sets the Defiant apart is its innovative modular design, enabling the vessel to host angled missile launch systems and operate as a transport unit. This flexibility may prove beneficial as the Navy faces new challenges on the water.
Serco received a significant contract worth $68.5 million from DARPA for the NOMARS program in 2022. The agency highlighted that the Defiant features advanced capabilities such as hybrid power generation, podded propulsion, and high-capacity batteries. These enhancements are intended to ensure the vessel can sustain itself during extended missions without recharging or servicing.
DARPA’s design philosophy for the NOMARS vessels is focused on "graceful degradation." This ensures that even if certain equipment malfunctions during a voyage, the ship will still operate effectively, maintaining a speed of 15 knots over the course of a full year at sea. This redundancy in systems is essential for missions that require durability and reliability in unpredictable environments.
The development of the USX-1 Defiant marks a significant milestone in naval technology. As the global naval landscape evolves, such innovative solutions will likely become critical assets for the United States Navy. While some may express skepticism about relying solely on unmanned vehicles, the reality is that these advancements hold the potential to enhance maritime security and efficiency.
The confirmation of the Defiant’s existence also prompts important questions regarding the balance of human and robotic presence in military operations. Ensuring national security while adapting to the challenges posed by emerging technologies could pave the way for a new age in maritime strategy.
As DARPA continues to refine and test the capabilities of the USX-1 Defiant, it remains to be seen how quickly this revolutionary vessel will integrate into the Navy’s operations. However, it is clear that the Defiant represents the future of naval engagements and the ongoing mission to modernize our military forces.
In conclusion, the unveiling of the USX-1 Defiant showcases the innovative spirit of our defense agencies as they work to keep our Navy at the cutting edge of technology. As this unique ship prepares for its debut, we can only hope it serves as a cornerstone for future advancements in protecting our national interests at sea.


