At what altitude should aircraft enter the Kings 4 MOA?

Entering the Kings 4 MOA (Military Operations Area) at an altitude of 14,500' MSL is the appropriate choice because it is the standard altitude used for this specific MOA when considering the operational requirements. Military operations often designate specific altitudes to maintain safe vertical separation from other air traffic and to optimize the use of airspace for training and maneuvers.

Choosing 14,500' MSL allows aircraft to operate above the average terrain in the area and below the typical altitude used by commercial and general aviation, which improves safety and efficiency in airspace management. There might be specific regulations or advisories that outline this altitude, ensuring that it meets necessary clearance and safety standards. Overall, selecting this altitude helps to provide a structured environment for both military and civilian operations.