How are prohibited areas depicted on aeronautical charts?

Prohibited areas are depicted on aeronautical charts with a "P" followed by a number, indicating that flight within these areas is not allowed. This designation is crucial for pilots, including those operating unmanned aerial systems, as it ensures safety and security by preventing aircraft from inadvertently entering restricted airspace.

These areas are established by authorities to protect sensitive locations, such as military installations or certain national landmarks, ensuring that aircraft do not pose a risk to vital operations in these regions. The use of the "P" and a number provides a clear and standardized way for pilots to identify these areas on their charts, helping them navigate safely and comply with air traffic regulations.

In contrast, other designations such as "R" for restricted areas and "A" for alert areas serve different purposes and are not indicative of prohibited flight paths, reinforcing the importance of knowing the specific aircraft chart symbols relevant to operational safety and compliance.