DARPA has announced its 132-foot Unmanned Surface Vehicle called Sea Hunter. It is highly autonomous and can stay at sea for months at a time. Comprised of three main areas, Sea Hunter is packed to the gills with sensors, fuel tanks, computers, and anti-fire mechanisms. Leidos, the company formally known as Science Applications International Corporation (SAIC) was contracted by DARPA to build Sea Hunter.

https://www.digitaltrends.com/cool-tech/darpa-officially-christens-the-actuv-in-portland/