Which class is NOT part of defensive counter air?

The correct answer identifies Aerial Reconnaissance as not being part of defensive counter air operations. Defensive counter air refers specifically to operations designed to protect friendly forces and assets from enemy air threats. This includes a variety of activities focused on neutralizing or mitigating those threats, which can be broken down into Offensive Counter Air and Defensive Counter Air.

Aerial Reconnaissance, while integral to gathering intelligence and situational awareness, does not directly engage with or counteract enemy air threats. Instead, it serves to support operations by providing valuable information about enemy forces, their movements, and potential intentions. This function is supportive and foundational rather than an active measure in the defense against air threats.

On the other hand, Offensive Counter Air specifically focuses on targeting enemy air capabilities to prevent them from launching successful attacks, and Surveillance Operations are critical for identifying and tracking aerial threats as part of the overall defensive posture. Thus, Aerial Reconnaissance stands distinctly apart in its role and function from the other categories that directly relate to countering air threats.