What does WAC represent in aviation?

The term WAC stands for "World Aeronautical Chart," and it is specifically designed for navigation at a scale of 1:1,000,000. This scale is used to provide pilots with an overview of a large area, making it suitable for flight planning and enroute navigation over extensive distances. The chart includes vital information such as terrain features, airspace classifications, navigational aids, and other regulatory data important for pilots planning their routes.

In the context of other charts, each has its specific use and scale, but for WAC, the designation and scale make it particularly useful for pilots needing a broader view of airspace and geography.