What is an 'Unmanned Aircraft System' (UAS)?

An 'Unmanned Aircraft System' (UAS) refers specifically to an aircraft that is operated without a pilot on board. This means the operation is conducted remotely, often involving a ground control station that allows an operator to steer the aircraft and manage its functions. The UAS encompasses not just the aircraft itself but also includes the control system and the communication links necessary for operation. This definition aligns with regulatory frameworks and technical descriptions used in aviation contexts.

The other options present different scenarios that do not accurately describe a UAS. For instance, mentioning a manned aircraft or specifying it exclusively for land surveying or as a type of helicopter does not capture the essence of a UAS, which fundamentally involves remote control and lack of onboard pilots, making option B the appropriate choice.