The Defiant will have to pass one final test that comes in the form of a long voyage out on the open seas, facing different ...

The ship, named the USX-1 Defiant, is the prototype resulting from about five years of work by the Defense Advanced Research ...

DARPA christened the USX-1 Defiant, a 180-foot fully autonomous medium unmanned surface vessel built for the U.S. Navy.

DARPA has its eyes on the skies with this program, but it is also going autonomous in the seas. Earlier this week, it ...