The Zumwalt is an imposing sight as it heads down the Kennebec River from Bath Iron Works in September 2016, drawing spectators along the way.

Spectators gather along the Kennebec River as the Zumwalt sails away from Bath Iron Works, where it was built.

The Zumwalt heads down the Kennebec River after leaving Bath Iron Works.

The Zumwalt sails down the Kennebec River, beginning its trip to Baltimore.

Capt. James Kirk, skipper of the Zumwalt, stands in front of the destroyer at Bath Iron Works the day before it left to be commissioned in Baltimore.

The Zumwalt has an angular shape to minimize its radar signature, an unconventional wave-piercing hull and a composite deckhouse that hides radar and other sensors.