An anonymous reader writes: The first Zumwalt-class destroyer, the USS Zumwalt, the largest ever built for the U.S. Navy, headed out to sea today. Departing from shipbuilder Bath Iron Works, the ship left to undergo sea trials. The AP reports: "The ship has electric propulsion, new radar and sonar, powerful missiles and guns, and a stealthy design to reduce its radar signature. Advanced automation will allow the warship to operate with a much smaller crew size than current destroyers. All of that innovation has led to construction delays and a growing price tag. The Zumwalt, the first of three ships in the class, will cost at least $4.4 billion."