TAIPEI -- Checking in at 7.7 kilograms and 70 centimeters long is the second version of the TTRobotix's Seawolf submarine, a motorised remote control submarine that can dive down to a depth of 8 ...

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While there are plenty of aerial drones that show us our surroundings from up in the air, there are far fewer remote-control devices that let us see what's lurking beneath the surface of the water.