What is the definition of a Controlled Firing Area (CFA)?

A Controlled Firing Area (CFA) is specifically defined as ground activities in a controlled environment that may pose hazards to aircraft. This area is designed to allow military or other authorized activities to take place safely, where the potential hazards are recognized and managed appropriately. The primary focus of a CFA is to ensure that aircraft can traverse the airspace without risk, as the activities conducted within a CFA can include live-fire training or other operations that could be dangerous to air traffic.

The other options do not accurately represent the definition of a CFA. Unrestricted airspace signifies areas where no specific restrictions exist, while military training operations may occur in various environments, not limited to a CFA. Lastly, airspace under radar control refers to the provision of air traffic services rather than the controlled activities involved in a CFA. Thus, the designation of a CFA is crucial in ensuring safety for both ground operations and air traffic.