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DJI drones have been able to navigate back to their takeoff point and land automatically for a while now. Landing's much easier for a multicopter than for a fixed wing aircraft.

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Ours went haywire and crashed into a pond onetime when we used the Return to Home feature. YMMV

I didn't say I'd ride on one personally. :P Just that the basics are solved, and reliability is a Simple Matter Of Engineering.

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