Which of the following describes the two distinctive types of unmanned aircraft systems?

The correct choice highlights the essential operational categories of unmanned aircraft systems (UAS), which are classified based on their method of control. Autonomous systems operate without human intervention, relying instead on pre-programmed algorithms and onboard sensors to navigate and perform tasks. In contrast, remote control systems require a human operator to manage the aircraft in real-time from a distance, using a handheld controller or interface.

Understanding these two types is crucial as they fundamentally influence the design, application, regulatory requirements, and operational frameworks of unmanned aircraft. Autonomous systems tend to be employed in applications ranging from agriculture to search and rescue, while remote-controlled systems are often used for tasks like surveillance and recreational flying.

The other options describe different aspects of unmanned aircraft but don't encapsulate the fundamental operational distinction as effectively. For instance, while fixed-wing and rotor-based pertain to the physical design, and military and civilian categorize based on usage, they do not directly address the control methods which are critical to the functioning of UAS. Similarly, consumable and recon do not adequately represent the broader classifications of unmanned systems.