Unmanned underwater vehicles: Aluminium batteries could let submarine drones range farther | The Economist

MUCH is made of the potential of flying drones. But drones are useful at sea, too. Unmanned underwater vehicles (UUVs), as they are known technically, are employed for things ranging from prospecting for oil and gas to naval warfare. Like their aerial cousins, though, ocean-going drones have limited ranges—limits that are often imposed by their batteries.

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What Drones Did for the Sky, Robot Subs Are About to Do for the Sea

The next drone revolution is happening underwater. Just as flying drones have changed from expensive specialist tools to mass-market million-sellers in a few short years, their aquatic counterparts are opening up the seas.

Unmanned submarines, known as Remotely Operated Vehicles, can regularly be seen on television exploring sunken cities or looking for crashed aircraft.

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