What is the purpose of the Chart Supplement?

The Chart Supplement serves as a comprehensive manual that provides detailed information about all public-use airports, heliports, and seaplane bases in the United States. It includes vital data such as runway dimensions, navigational aids, services available, communications frequencies, and any special notices or procedures relevant to each location.

This resource is essential for pilots during flight planning, as it offers critical insights necessary for safely navigating to and from various airports. While other choices mention important aspects such as weather conditions and regulations for international flights, the primary and most direct purpose of the Chart Supplement is to compile this extensive airport information for public-use facilities. It is a key resource for ensuring that pilots have the information they need for safe and efficient operations at different airports across the nation.