[Myrddin]

No pilot - No labor

The pilot is sitting on the ground. The drone is flown by a radio link. There is not only labor for the pilot doing the flying, but there is also maintenance to keep the UAV in good mechanical and electronic condition. The principal advantage is not having a live pilot in the aircraft. Less fuel. No risk to the life of the pilot. Ability to make high G maneuvers that a live pilot could not tolerate.

[Travis McGee]

The smallest military UAVs in service actually have no pilot, on the ground or anywhere else. They are simply launched, and then fly to predetermined coordinates and run preset search patterns, and orbit around items of interest on a path which keeps the camera on the center of the orbit.

This saves the military having to train R/C pilots. Just send em up, and tell em where to go and when to come home.