What does A-211 refer to on an aeronautical chart?

A-211 on an aeronautical chart specifically designates an alert area. Alert areas are locations where there is a high volume of flight training or unusual aerial activity, and they are indicated on charts for the purpose of increasing awareness among pilots. The presence of an alert area suggests that pilots should exercise caution while flying in that space.

This designation is important for safety, as it informs pilots to be on the lookout for other aircraft that may be operating within or near the area, particularly due to activities that could include flight training maneuvers, parachute jumping, or other specialized operations. While there are other types of airspace like controlled airspace, restricted areas, or flight paths, A-211 distinctly refers to an alert area and emphasizes the need for situational awareness in such environments.