What is the primary flight control used for the boom?

The primary flight control used for the boom is known as the Boom Control Lever. This lever specifically manages the positioning and control of the boom during aerial refueling operations, allowing pilots to precisely maneuver the boom to connect with receiver aircraft.

While the term "Boom Flight Control Stick" might suggest a control interface for managing the boom’s operations, the standard terminology for the actual control mechanism in aerial refueling systems is the Boom Control Lever. It is designed to provide the necessary tactile feedback and precision that pilots require during such critical in-flight operations.

Other choices such as the Vertical Stabilizer and Flight Management System do not directly relate to the control of the boom. The vertical stabilizer is a structural component of the aircraft that helps maintain stability during flight, while the flight management system is responsible for navigation and route planning, not for operating the boom itself.