UCAV

&nbsp An unmanned aerial vehicle (UAV), also known as a unmanned aircraft system (UAS), remotely piloted aircraft (RPA) or unmanned aircraft, is a machine which functions either by the remote control To distinguish UAVs from missiles, a UAV is defined as a "powered, aerial vehicle that does not carry a human operator, uses aerodynamic forces to provide vehicle lift, can fly autonomously or be piloted remotely, can be expendable or recoverable, and can carry a lethal or nonlethal payload".|[1] Therefore, cruise missiles are not considered UAVs, because, like many other guided missiles, the vehicle itself is a weapon that is not reused, even though it is also unmanned and in some cases remotely guided.There are a wide variety of UAV shapes, sizes, configurations, and characteristics. Historically, UAVs were simple drones but autonomous control is increasingly being employed in UAVs.