Move Over Drones, Driverless Cars — Unmanned Ships Up Next

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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 Advanc