Large Map

Expanded to a 6 chart set in February 2004, IFR Enroute High Altitude Charts (Conterminous U.S. and Alaska) are designed for navigation at or above 18,000 ft MSL.

This expansion was necessary for the publication of additional RNAV routes, RNAV/GPS waypoints, implementation of the High Altitude Redesign/Navigation Reference Grid (NRS) and to permit easier readability. In some instances, this change to a larger scale chart will allow for a less cluttered depiction of aeronautical information, in other instances the new layout will allow for better alignment of charts to accommodate high-density traffic routes.

This four color series includes:

• Jet Route Structure
• VHF radio aids to navigation (frequency, ID, channel, geographic coordinates)
• Selected airports
• Reporting Points

Enroute High Altitude charts are revised every 56 days.