Plain English Meaning

It is the system of published flight highways used at lower altitudes -- below 18,000 feet -- that connects navigation aids and gives pilots defined routes to fly between them.

Full Definition

The network of Federal airways in the United States that extends from 1,200 feet above the surface up to, but not including, 18,000 feet MSL. These airways are designated Victor airways (V-airways) when based on VOR navigation, and are depicted on en route low-altitude charts.

Context Anchor

Seen on FAA low-altitude en route charts and used when planning or receiving an below 18,000 feet .