What is an A/FD?

The correct answer is the Airport/Facility Directory. This publication serves as a comprehensive resource for pilots, providing critical information about airports and facilities across the United States. It includes details such as airport layout diagrams, approaches and departures, services available, communication frequencies, and area navigation information.

The Airport/Facility Directory is essential for flight planning and situational awareness, helping pilots ensure safe and efficient operations at various airports. It is regularly updated to reflect changes in facilities, regulations, and airspace, making it a vital reference for both private and commercial pilots.

The other options do not accurately represent the A/FD. For instance, Aeronautical Flight Document and Aviation/Flying Directive suggest documents that are not specific or standardized publications, while Airspace/Flight Database implies a data-oriented resource that does not exist in this context. The specificity and breadth of information provided by the Airport/Facility Directory are what make it indispensable for aviation operations.