Defstat
a series of levels of readiness used to define the operations of the Death Star battle station. Defstat Zero indicated the normal operation of the station. Defstat One indicated that the station was on alert, and all defenses were upgraded to operational station. This level is only a warning level. Defstat Two indicates that an enemy craft has been identified in the space surrounding the Death Star's position. Defstat Three was the highest level, indicating that the station was actively engaged in combat.