[coin]

I have yet to see a practical solution that provides separation between UAV and manned aircraft. All flights under VFR are responsible for their own separation by way of see-and-be-seen. I have yet to see a UAV that can visually recognize an approaching aircraft and take evasive action.

[tim333]

Perhaps do the separation by height above the ground? In most of the world light aircraft are not supposed to fly below 500ft apart from landing. You could limit drones to flying below 200ft say. It would also reduce the impact when they pack up and crash on you!