In which mode is Mode 4C inoperative when gear is down, flaps at ½ detent or less, and below 500 feet?

Mode 4C operates under specific conditions that relate to the aircraft's configuration and altitude. In the Tactical mode, certain features may be disabled to enhance operational capabilities suitable for various tactical situations. Specifically, when the landing gear is down, flaps are at ½ detent or less, and the aircraft is below 500 feet, the tactical mode limits certain functionalities, including Mode 4C, as a means of prioritizing critical flight parameters essential for tactical operations.

This operational restriction is significant because it helps to ensure that the aircraft maintains optimal performance and safety during low-altitude maneuvers, where full situational awareness might be less crucial, and tactical approaches are prioritized.

In contrast, other modes like NORMAL, TAWS, and GPWS do not exhibit the same inoperability under the mentioned conditions, as they maintain normal operational capabilities regardless of the configuration, focusing on different aspects of flight management and safety.