What component maintains the bottom of the net in place on the runway in a BAK-15 system?

In a BAK-15 system, the component responsible for maintaining the bottom of the net in place on the runway is the anchor straps. These straps are crucial for securing the net's position during operation, ensuring that it does not shift or lift due to aerodynamic forces or aircraft interaction. Proper anchoring is essential for maintaining the integrity and effectiveness of the arrestor system. The stability provided by the anchor straps helps to ensure that the net can effectively decelerate and safely stop an aircraft during an emergency landing or overshoot.

The other components, while important for the overall functioning of the BAK-15 system, serve different purposes. The mast assembly supports the net structure itself, the suspension cables help in supporting and positioning the net, while shock absorbers are designed to cushion and reduce the impact forces during the retrieval of the net after an aircraft has passed through. Each part is integral to the system's overall functionality, but it is the anchor straps that specifically maintain the bottom position of the net on the runway.