Which system is primarily responsible for air defense on a naval vessel?

The Integrated Anti-Air Warfare System is primarily responsible for air defense on a naval vessel because it encompasses the technologies, sensors, weapons, and tactics required to detect, track, engage, and neutralize aerial threats. This system integrates various subsystems to create a comprehensive defense strategy against enemy aircraft and missiles, ensuring the safety of the ship and its operational environment.

While the Combat System plays a broader role in overall naval operations, including air defense as one of its functions, it does not solely focus on air threats. The Combat System includes capabilities for surface and undersea warfare as well, making it a more encompassing but less specialized choice.

The Navigation Control System is specifically geared towards the vessel's movement and navigation, helping to chart courses and avoid obstacles, which is essential for safe navigation but not for air defense. Similarly, the Radar Tracking System is a crucial element of air defense as it monitors airspace, but it is only one component of the Integrated Anti-Air Warfare System, which also orchestrates weapon systems and other sensors to counter aerial threats effectively. Hence, the Integrated Anti-Air Warfare System is the most comprehensive choice, reflecting the complete approach to air defense on naval vessels.