2. IFR En Route High Altitude Charts
(Conterminous U.S. and Alaska). En route high
altitude charts are designed for navigation at or above
18,000 feet MSL. This four-color chart series
includes the jet route structure; VHF NAVAIDs with

frequency, identification, channel, geographic coordinates; selected airports; reporting points. Scales
vary from 1 inch = 45 nm to 1 inch = 18 nm. 55 x 20
inches folded to 5 x 10 inches. Revised every 56 days.
(See FIG 9-1-7 and FIG 9-1-8.)

FIG 9-1-7

En Route High Altitude Charts for the Conterminous U.S.

FIG 9-1-8

Alaskan En Route High Altitude Chart

9-1-6

Types of Charts Available