The US Navy's newest destroyer, the USS Zumwalt (DDG-1000) has left its berth at Bath, Maine and begins her sea trials. She's due to enter service next year. At 600 feet in length, almost a full 100 feet longer than the Arleigh Burke class, she's the largest destroyer the US Navy has ever launched.

No doubt naval enthusiasts will debate on her classification as a 'destroyer' but that is what the US Navy considers her. Here's a video from the US Naval Institute News site of her under way :

Zumwalt underway

From the USNI site, written by Sam LaGrone
On Monday morning, the first-in-class Zumwalt-class destroyer left its pier at General Dynamics Bath Iron Works, headed down Maine’s Kennebec River bound for the Atlantic Ocean and its first taste of saltwater.

The 16,000-ton Zumwalt (DDG-1000) departed the yard for its first set of open ocean trials — years after the ship began construction in 2008 and after several production delays.

The trials follows a four day “fast cruise” in October in which the ship did everything from rolling the shafts, bringing up and down systems, testing failure modes, testing watch station effectiveness,” Sean Stackley, Assistant Secretary of the Navy for Research, Development & Acquisition (RDA) told Defense News last month.
“We did everything that we could next to the pier prior to getting underway.”

Zumwalt is the first of three planned ships in the $22.1 billion program that promises a next generation propulsion system that has enough energy to power future sensors and weapon systems.

However, delays in production for the ships at BIW have pushed back delivery schedules for other ships in the yard.