What is one limitation of close air support?

The radius of action is a significant limitation of close air support because it determines how far an aircraft can operate from its base or forward operating base while maintaining the capability to loiter over a battlefield for effective support. Aircraft have a limited amount of fuel, which restricts their flight time and operational range. This limitation means they may not be able to reach distant battlefields or provide sustained support in areas far from their operating bases without refueling. This affects their ability to respond quickly to changing ground situations, especially in dynamic combat environments where ground forces may need immediate and continuous air support.

In contrast, factors such as a high morale effect, speed and maneuverability, and accurate tracking of enemy movements play more to the benefits of air support rather than its limitations. These aspects can enhance the effectiveness of air operations, but they do not constrain the operational capability of air support in the same crucial way as the radius of action does.