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

The term that indicates that the laser designator system is inoperative is "Dead eye." This term explicitly conveys that the system is unable to function effectively, rendering it unable to acquire or designate targets for laser guidance. In military parlance, such brevity terms are used for clear and concise communication during operations, particularly in high-pressure situations where quick understanding of system status is crucial.

The other terms relate to different contexts. "Blind" typically refers to a situation where an operator cannot receive or see targeting information due to limitations in visibility or sensor range. "No joy" indicates a lack of success in acquiring a target or objective, but doesn’t directly address the operational status of a system. "Terminated" usually signals the end of a mission or procedure, not necessarily implying that the system is inoperative. Understanding these distinctions is vital for effective communication within operational environments.