US Navy tested world's largest unmanned surface vessel, Sea Hunter

On 2 May 2016 US Navy tested the world's largest unmanned surface vessel named Sea Hunter in San Diego.
•    It is a self-driving 132-foot ship able to travel up to 10000 nautical miles.
•    It is designed to travel thousands of miles out at sea without a single crew member on board.
•    The Pentagon's research arm, the Defense Advanced Research Projects Agency (Darpa) developed the ship with Virginia-based Leidos.
•    The ship is powered by two diesel engines.
•    It is a 132ft-long (40-metre) unarmed prototype ship.
•    The ship underwent two years of testing which includes verifying that it can safely follow international norms for operating at sea.
•    It is the naval equivalent of Google's self-driving car.
•    It marks the first step toward sending unmanned cargo vessels between countries, according to military officials, who showed off the ship in San Diego today before it was put in the water.
•    The Pentagon's research arm, the Defense Advanced Research Projects Agency (Darpa) developed the ship along with Virginia-based Leidos. 
•    Darpa will test it in conjunction with the Navy over the next two years off California's coast. 
•    The tests will largely focus on its ability to react on its own to avoid collisions with seafaring traffic.
•    During the testing phase, the ship will have human operators as a safety net, but once it proves to be reliable, the autonomous surface vessel will maneuver itself — able to go out at sea for months at a time.