What does "Set Brakes" instruct personnel to do during ramp operations?

The instruction "Set Brakes" specifically tells personnel to engage the aircraft brakes, ensuring that the aircraft remains stationary and secure during ramp operations. This is crucial for maintaining safety on the ramp where various activities—such as loading and unloading luggage, fueling, and the movement of other vehicles—are happening in close proximity to the aircraft. Engaging the brakes prevents any unintended movement of the aircraft that could lead to accidents or hazardous situations.

In ramp operations, the safety and security of the aircraft must be prioritized, and engaging the brakes is a fundamental part of that process. This action helps to create a stable environment for ground personnel to operate safely around the aircraft.