In a BAK-15 arresting system, which component holds the net in position for the arrestment?

In a BAK-15 arresting system, the component that holds the net in position for an arrestment is the mast assembly. This structure is critical as it supports and secures the net during the landing process. When an aircraft engages with the arresting wire, the mast assembly provides the necessary stability and alignment for the net to function effectively, ensuring that it captures and decelerates the aircraft safely.

The stanchion assembly, although important for supporting other components, does not play the primary role in holding the net in place, while arresting wires are the primary means of decelerating the aircraft and are not involved in net positioning. Net stabilizers might assist with alignment but do not serve the primary function of securing the net against movement during an arrestment. Thus, the mast assembly is fundamental to the operation of the BAK-15 system, ensuring the net remains properly positioned throughout the landing process.