When is the only time the Boom Operator will move the boom during BDA operation?

The Boom Operator's primary role during a Boom Drain Area (BDA) operation is to ensure safe and effective refueling. The operator is trained to monitor the positioning of both the boom and the receiver aircraft closely during the process. The only time the Boom Operator will move the boom during a BDA operation is to avoid striking the receiver aircraft. This action prioritizes safety and operational integrity, ensuring that no collision occurs while transferring fuel.

Choosing to reposition the boom in this scenario demonstrates the operator's proactive approach to maintaining a safe environment, particularly since the receiver aircraft is often in a position of uncertainty during the fueling process due to varying speeds, altitude changes, or unexpected maneuvers. Ensuring that the boom is adjusted to prevent contact directly addresses this critical operational concern, meaning the correct answer highlights an essential aspect of the Boom Operator's responsibilities.

Other options, while related to the duties of the Boom Operator, do not represent accurate scenarios for moving the boom specifically during BDA operations. Engaging the fuel line or stabilization can typically be accomplished without adjusting the boom in dangerous proximity to the receiver aircraft, and realigning is not necessary as it does not pertain directly to avoiding a collision.