What do IFR Operations at altitudes below 18,000 feet rely on from the Low Altitude Charts?

IFR operations at altitudes below 18,000 feet primarily rely on the airway system and related data as depicted on Low Altitude Charts. These charts provide essential information for pilots, including the layout of airways, navigational aids, minimum safe altitudes, and related waypoints. This structured network is crucial for maintaining safe and efficient flight paths, particularly in the congested airspace where many aircraft operate at lower altitudes.

The airway system allows for standardized routes, which helps in managing air traffic and ensuring compliance with air traffic control instructions. By following the airway routes, pilots can navigate more effectively and coordinate with controllers to maintain safe distances from other aircraft. The information related to navigational aids also helps pilots in determining their position and maintaining their intended flight path.