Effective with the February 19, 2004 edition, five new charts are being added to the conterminous U.S. High Altitude Enroute (EHUS) Aeronautical Chart series, resulting in an entirely new layout (click here to view the old and new layout for reference).

This expansion is 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 accomodate high-density traffic routes.

Parts of this chart appeared on all three previous High Altitude IFR Charts -- H-1/H-3, H-2/H-4 and H-5/H-6.