What is the primary purpose of an alert area?

The primary purpose of an alert area is to indicate where high-density training may occur. These areas are typically established in locations where military or other types of operations, such as pilot training exercises, might create increased traffic or activity. While other users are allowed to enter these areas, they should remain vigilant and be aware of the potential for increased flight activity.

Unlike restricted areas, which prohibit all unauthorized entry, or prohibited areas, which completely bar any aircraft from operating within them, alert areas serve to caution pilots of potential hazards due to other aircraft. This understanding is crucial for maintaining safety and situational awareness in busy or active training zones.