So, when we are talking about a UAV which isn’t controlled by any pilot, the chances of a collision happening in the air multiply greatly. While the pilot of a manned aircraft can detect the presence of vehicles flying in their vicinity and take evasive action quickly, a drone cannot make that call unless it is directed to do so from the ground.
Thus, UAVs are more likely to get involved in an air collision than piloted aircraft. Unless this safety issue is resolved, the future of UAV transport looks questionable. Ground Collisions It is not only the collision of the UAV with other aircraft in the air that may cause great damage.