Fixed hook systems can be used bidirectionally for arrestments (during approach-end as well as runway-end engagements); therefore, a system containing two energy absorbers is installed on each end of the runway. The systems are kept in the ready position via a steel cable (pendant) that crosses the runway and connects the absorbers' nylon tapes. These tapes pass through the runway edge sheaves on both sides (see diagram).

The braking system is activated by the tail hook of the aircraft catching the pendant, which then pulls the tapes out from the brakes as the aircraft continues to move. Energy absorbers slow and stop the aircraft in a safe and controlled manner.