"Larry Dighera" wrote

In fact, to my knowledge, the UAV manufacturers have
not yet demonstrated a synthetic vision system adequate to permit UAVs
to comply with FAA see-and-avoid regulations.

You know, I wonder why they have not developed some means, yet. There are
certainly radar systems that could be tuned to detect planes in the area.
Perhaps they could just swing their existing ground surveillance systems up
and around the surrounding airspace once in a while, to make sure the
airspace is clear?
--
Jim in NC