What brevity term indicates that the laser designator system is inoperative?

The correct brevity term that indicates that the laser designator system is inoperative is "Dead eye." This term specifically communicates that the equipment responsible for laser designation is not functioning, which is critical information in fire support operations.

In the context of military communications, using clear and precise terminology helps to avoid confusion and ensures that all parties understand the status of their systems and capabilities. "Dead eye" conveys an urgent need to adjust tactics or alternative methods for target engagement since the laser designation capability is unavailable.

Other terms such as "Blind" or "No joy" refer to an inability to see or engage with a target, but they do not specifically indicate a failure of the laser designator system. "Terminated" usually refers to the conclusion of a mission or task rather than the status of equipment. This distinction is important in operational scenarios where rapid and accurate communication of system status is essential for mission success.