The U.S. Navy said it made a breakthrough in drone technology with the first flight of the X-47B, a bat-winged unmanned jet designed to take off and land from an aircraft carrier, one of the most complex and difficult feats in aviation.

The experimental aircraft, made by Northrop Grumman Corp., made its debut flight Friday, taking off from and returning to Edwards Air Force Base. The 29-minute flight was designed to pave the way for an eventual demonstration that the fighter-sized robotic aircraft can operate from the deck of an aircraft carrier, not just from land, as current drones do.

The first flight of the X-47B highlights the dramatic evolution of unmanned aircraft in recent years, a technology the U.S. is relying on for surveillance and strike missions in the Afghanistan war. Unlike the Predator drone, which is operated by a controller on the ground, the X-47B is supposed to operate more autonomously, flying on a pre-programmed flight path. The X-47B also will be less visible to radar than most drones.

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