How many aluminum stakes are used to anchor the unidirectional mobile aircraft arresting system alongside the runway?

The unidirectional mobile aircraft arresting system is an essential safety feature used at airports to quickly decelerate aircraft that may have difficulty stopping on the runway. The number of aluminum stakes required for anchoring this system is crucial for ensuring stability and effectiveness during its operation.

In this context, 19 aluminum stakes are specified to provide an adequate level of anchoring. This number strikes a balance between securing the system sufficiently to handle the forces exerted by an arresting maneuver while also considering the ease of deployment and removal. The choice of 19 reflects industry standards commonly adopted for this type of equipment, ensuring it meets safety requirements effectively.

The other options, while they present different quantities of stakes, do not align with the established operational protocols for this system, which have determined that 19 is the optimal number for durable anchoring.