This is the best tl;dr I could make, original reduced by 87%. (I'm a bot)

> Now a novel combination of a metal detector and a drone with five degrees of freedom is under development at the Autonomous Systems Lab at ETH Zurich.

> Unless you want to mount your metal detector on some kind of gimbal system, you need a drone that can translate its position without tilting, and happily, such a drone not only exists but is commercially available.

> The drone used in this research is made by a company called Voliro, and it's a tricopter that uses rotating thruster nacelles that move independently of the body of the drone.

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