Largest destroyer built for Navy headed to sea for testing

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Largest US Navy Destroyer, Zumwalt
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Largest destroyer built for Navy headed to sea for testing
The first Zumwalt-class destroyer, the largest ever built for the U.S. Navy, heads down the Kennebec River after leaving Bath Iron Works, Monday, Dec. 7, 2015, in Bath, Maine. The ship is headed out to sea for the first time to undergo sea trials.(AP Photo/Robert F. Bukaty)
The first Zumwalt-class destroyer, the USS Zumwalt , the largest ever built for the U.S. Navy, leaves the Kennebec River, Monday, Dec. 7, 2015, in Phippsburg, Maine. The futuristic ship is headed out to sea for the first time to undergo sea trials.(AP Photo/Robert F. Bukaty)
The U.S. Navy's first Zumwalt-class destroyer, the USS Zumwalt, leaves the Kennebec River, passing a crowd of spectators near Fort Popham, a Civil War-era fortification, Monday, Dec. 7, 2015, in Phippsburg, Maine. The ship is headed out to sea for the first time to undergo sea trials.(AP Photo/Robert F. Bukaty)
The first Zumwalt-class destroyer, USS Zumwalt, the largest ever built for the U.S. Navy, passes spectators at Fort Popham at the mouth of the Kennebec River in Phibbsburg, Maine, Monday, Dec. 7, 2015, in Bath, Maine. The ship is headed out to sea for the first time to undergo sea trials. (AP Photo/Robert F. Bukaty)
Exhaust smoke surrounds the Coast Guard cutter Ocracoke as it moves into position to lead the U.S. Navy's first Zumwalt-class destroyer down the Kennebec River, Monday, Dec. 7, 2015, in Bath, Maine. (AP Photo/Robert F. Bukaty)
BATH, ME - DECEMBER 7: A crowd of people enjoy the view from the dog park deck as The Zumwalt launches from Bath Ironworks at 8:30 for sea trials and heads down the Kennebec River to the ocean at Popham Beach. (Photo by Gordon Chibroski/Portland Press Herald via Getty Images)
PHIPPSBURG, ME - DECEMBER 7: The U.S. Navy's newest destroyer, Zumwalt, sails down the Kennebec River toward the Atlantic for a series of sea trials after leaving Bath Iron Works on Monday morning. (Photo by Ben McCanna/Portland Press Herald via Getty Images)
PHIPPSBURG, ME - DECEMBER 7: The U.S. Navy's newest destroyer, Zumwalt, exits the Kennebec River toward the Atlantic after leaving Bath Iron Works on Monday morning. (Photo by Ben McCanna/Portland Press Herald via Getty Images)
PHIPPSBURG, ME - DECEMBER 7: Leslie Barker scans the Kennebec River for signs of the U.S. Navy's newest destroyer Zumwalt alongside husband Ken Barker on Monday at Ft. Popham. Hundreds of people gathred at the mouth of the Kennebec to witnesss the ship sail out to sea. (Photo by Ben McCanna/Portland Press Herald via Getty Images)
PHIPPSBURG, ME - DECEMBER 7: The U.S. Navy's newest destroyer, Zumwalt, sails down the Kennebec River toward the Atlantic for a series of sea trials after leaving Bath Iron Works on Monday morning. (Photo by Ben McCanna/Portland Press Herald via Getty Images)
PHIPPSBURG, ME - DECEMBER 7: The U.S. Navy's newest destroyer, Zumwalt, sails down the Kennebec River toward the Atlantic for a series of sea trials after leaving Bath Iron Works on Monday morning. (Photo by Ben McCanna/Portland Press Herald via Getty Images)
PHIPPSBURG, ME - DECEMBER 7: The U.S. Navy's newest destroyer, Zumwalt, enters open ocean after leaving Bath Iron Works on Monday morning. (Photo by Ben McCanna/Portland Press Herald via Getty Images)
PHIPPSBURG, ME - DECEMBER 7: Spectators share a pair of binoculars as the U.S. Navy's newest destroyer, Zumwalt, motors out of the Kennebec River and into the Atlantic. (Photo by Ben McCanna/Portland Press Herald via Getty Images)
The first Zumwalt-class destroyer, the USS Zumwalt, the largest ever built for the U.S. Navy, leaves the Kennebec River, Monday, Dec. 7, 2015, in Phippsburg, Maine. The ship is headed out to sea for the first time to undergo sea trials. (AP Photo/Robert F. Bukaty)
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BATH, Maine (AP) — The largest destroyer ever built for the U.S. Navy headed out to sea for the first time Monday, departing from shipbuilder Bath Iron Works and carefully navigating the winding Kennebec River before reaching the open ocean where the ship will undergo sea trials.

More than 200 shipbuilders, sailors and residents gathered to watch as the futuristic 600-foot, 15,000-ton USS Zumwalt glided past Fort Popham, accompanied by tugboats.

Kelley Campana, a Bath Iron Works employee, said she had goose bumps and tears in her eyes.

"This is pretty exciting. It's a great day to be a shipbuilder and to be an American," she said. "It's the first in its class. There's never been anything like it. It looks like the future."

Larry Harris, a retired Raytheon employee who worked on the ship, watched it depart from Bath.

"It's as cool as can be. It's nice to see it underway," he said. "Hopefully, it will perform as advertised."

Bath Iron Works will be testing the ship's performance and making tweaks this winter. The goal is to deliver it to the Navy sometime next year.

"We are absolutely fired up to see Zumwalt get underway. For the crew and all those involved in designing, building, and readying this fantastic ship, this is a huge milestone," the ship's skipper, Navy Capt. James Kirk, said before the ship departed.

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.

The ship looks like nothing ever built at Bath Iron Works.

The inverse bow juts forward to slice through the waves. Sharp angles deflect enemy radar signals. Radar and antennas are hidden in a composite deckhouse.

The builder sea trials will answer any questions of seaworthiness for a ship that utilizes a type of hull associated with pre-dreadnought battleships from a century ago.

Critics say the "tumblehome" hull's sloping shape makes it less stable than conventional hulls, but it contributes to the ship's stealth and the Navy is confident in the design.

Eric Wertheim, author and editor of the U.S. Naval Institute's "Guide to Combat Fleets of the World," said there's no question the integration of so many new systems from the electric drive to the tumblehome hull carries some level of risk.

Operational concerns, growing costs and fleet makeup led the Navy to truncate the 32-ship program to three ships, he said. With only three ships, the class of destroyers could become something of a technology demonstration project, he said.

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Follow David Sharp on Twitter at https://twitter.com/David_Sharp_AP

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This story has been corrected to show ship weighs 15,000 tons, not pounds.


Navy Largest Destroyer Begins Sea Trials
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