Rolls-Royce plans remote-controlled ships with no captain or crew on board

A fleet of giant cargo ships, up to almost a quarter of a mile long and wider than a motorway, are to crisscross the world’s oceans without a captain or crew on board.
The remote-controlled vessels, which could set sail within the decade, are the latest development in the growing trend for unmanned vehicles, with drone aircraft already flying and Google planning to introduce driverless cars.