What type of system is used to send control commands to the UAS?

The correct choice highlights the importance of the data link system in the operation of Unmanned Aircraft Systems (UAS). A data link system is a crucial component that enables the transmission of control commands from the ground to the unmanned aircraft. It functions by establishing a communication network that allows for the exchange of telemetry data and command signals. This ensures that operators can effectively control the UAS in real-time, monitor its status, and receive relevant information during a mission.

In the context of UAS operations, the ground control station serves as the operator's interface, providing a visual representation of the UAS's real-time data and flight status. While the remote video terminal is specific to video feed and monitoring, it does not directly send control commands. An autonomous control system operates independently without the need for constant human input, making it distinct from the data link system responsible for manual control commands. Understanding these distinctions reflects the different roles each system plays in UAS operations.