If you have ever flown model airplanes much, it's really difficult to judge when the model is over something, closer or further.
Tree for example, it's really hard to tell if your on this side or the other side of a tree. I assume than the "drone" would have to have a camera
on it to tell if it's over the victim?
How about something like a line trowing cannon, just shoot a messenger line over top of the victim, low cost, low tech, no wind
limitations. You would have to have enough sense to not shoot the victim though.
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