Move over drones, driverless cars — unmanned ship up next

SAN DIEGO (AP) — It’s not only drones and driverless cars that may become the norm someday — ocean-faring ships might also run without captains or crews.
The Pentagon on Monday showed off the world’s largest unmanned surface vessel, a self-driving 132-foot ship able to travel up to 10,000 nautical miles on its own to hunt for stealthy submarines and underwater mines.
The military’s research arm, the Defense Advanced Research Projects Agency, or DARPA, in conjunction