How often are High/Low Altitude Charts published?

High and Low Altitude Charts are published every 8 weeks to ensure that pilots have access to the most updated navigational information. This regular revision cycle is crucial because it allows for changes in air traffic patterns, airways, and geographic features that might affect flight operations. The charts need to reflect the current state of navigation aids, airspace restrictions, and other critical factors that can change frequently. By adhering to this 8-week publication schedule, aviation authorities help maintain safety and operational efficiency in the National Airspace System, ensuring pilots have reliable resources for navigation.