Interpretation should include the following:
- IFR Enroute High Altitude Charts (Conterminous U.S. and Alaska) are designed for navigation at or above 18,000 feet mean sea level (MSL). This four-color series includes:
- Jet Route Structure
- RNAV (Area Navigation) Q-Routes
- VHF (very high frequency) radio aids to navigation (frequency, ID, channel, geographic coordinates)
- Selected airports
- Reporting Points
- NRS (Navigation Reference System) Waypoints
- Revised every 56 days
PLT055