US IFR Enroute Low Altitude Charts

Federal Aviation Administration

L27/28

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IFR Enroute Low Altitude Charts provide aeronautical information for navigation under instrument flight rules below 18,000 feet MSL. These four-color chart series includes:
  • Air Traffic Services
  • Airports that have an Instrument Approach Procedure or a minimum 3000' hard surface runway
  • Airways/Route Data
  • Cruising Altitudes
  • Fixes/ATC Reporting Points
  • Limits of controlled airspace
  • Military Training Routes
  • Off Route Obstruction Clearance Altitudes (OROCA)
  • Radio aids to navigation
  • RNAV Routes
  • Special Use Airspace Areas
  • Tabulations (MTRs, SUAs, MOAs, Airport data)
Area Charts, which show congested terminal areas at a large scale, are included with subscriptions to any conterminous U.S. Set Low (Full set, East or West sets). Charts are revised every 56 days.