A historical feat of engineering has come together right here in the Puget Sound: the U.S Navy’s first-ever fully autonomous vessel, which can sail without a crew, has been christened in the Port of Everett.The ship, named the USX-1 Defiant, is the prototype resulting from about five years of work by the Defense Advanced Research Projects Agency (DARPA).The premise of the project was to find a way to make a naval ship, just like a Roomba. Yes, the circular robot that cleans your kitchen floors. However, the concept, he says, is essentially the same. Fit the technology for an autonomous program into a big vessel.–