What is responsible for holding the net upright and centered on the runway in its arrestment position in a BAK-15 system?

In a BAK-15 system, the suspension system is critical because it is designed to hold the net in an upright and centered position on the runway during its arrestment function. The suspension system consists of cables, pulleys, and other components that work together to maintain the proper tension and alignment of the net, ensuring that it can effectively catch an aircraft that has failed to stop on the runway.

The other components, while important, serve different purposes. Stanchions are vertical supports that may help to anchor the net but do not control its overall position. Anchor straps provide securing points to help stabilize the net but are not responsible for its vertical alignment. Adjustable beams could be involved in structural adjustments, but they do not directly influence the net’s positioning for arrestment as the suspension system does. Hence, the suspension system is the key component that ensures the net remains correctly positioned to perform its function during aircraft landings.