An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without any human pilot, crew, or passengers on board. UAVs are a component of an unmanned aircraft system (UAS), which includes adding a ground-based controller and a system of communications with the UAV. The flight of UAVs may operate under remote control by a human operator, as remotely-piloted aircraft (RPA), or with various degrees of autonomy, such as autopilot assistance, up to fully autonomous aircraft that have no provision for human intervention.
An unmanned ground vehicle (UGV) is a vehicle that operates while in contact with the ground and without an onboard human presence. UGVs can be used for many applications where it may be inconvenient, dangerous, or impossible to have a human operator present. Generally, the vehicle will have a set of sensors to observe the environment, and will either autonomously make decisions about its behavior or pass the information to a human operator at a different location who will control the vehicle through teleoperation.
Unmanned Surface Vehicles (USVs; also known as Unmanned Surface Vessels (USVs) or (in some cases) Autonomous Surface Vehicles (ASVs), Uncrewed Surface Vessels (USVs), or colloquially drone ships) are boats or ships that operate on the surface of the water without a crew.USVs operate with various levels of autonomy, from simple remote control to autonomous COLREGs compliant navigation.
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