Final answer:
Federal Airways are found within controlled airspace and are depicted as blue lines on sectional charts, ensuring safe separation between aircraft through FAA regulations.
Step-by-step explanation:
Federal Airways, shown as blue lines on a sectional chart, are typically found within controlled airspace. This airspace is designed to facilitate air traffic control services and ensure safety by managing the flow of air traffic. The Federal Aviation Administration (FAA) governs this airspace and implements regulations such as maintaining a five-mile distance between planes flying at the same altitude and a vertical separation of 2,000 feet (or 1,000 feet when below 29,000 feet). These measures, along with the introduction of the hub-and-spoke system post-deregulation, allow for efficient routing of aircraft while maximizing safety and preventing collisions.