The phrase "human pilot" refers to a person who controls or operates a vehicle, like an airplane or a spacecraft, instead of relying on automated systems or robots. Full definition
It was designed to fly enemy aircraft in a virtual air combat simulator, but has now been turned into a system that controls allied planes that accompany human pilots in the simulator. (newscientist.com)
Equipped with cameras, and operated from the ground by human pilots, wedding drones are the newest addition to the guest list. (discovermagazine.com)
It was also around this time that the existence of Armored Core Sigma was leaked, effectively a PlayOnline Armored Core game that would feature a battlefield comprised of human piloted AC's with an operator overseeing each faction. (mechadamashii.com)