depicted on aeronautical charts. Refer to the CFRs, AIM, and FAA Order 7400.2 for
more detailed information.
VOR and L/MF Airways
The VOR and L/MF airways system consists of airways designated from 1,200 feet
above the surface up to but not including 18,000 MSL. To the extent possible, VOR and
L/MF airways overlap enough to ease the transition between each.
VOR airways are depicted in blue on aeronautical charts and are identified by a V
(spoken Victor) followed by an airway number (e.g., V11). L/MF airways are identified
by color and number (e.g., Green One). Green and red L/MF airways are plotted east
and west. Blue and amber L/MF airways are plotted north and south.
Except in Alaska, VOR airways are established solely on VOR or VHF Omnidirectional
Range/Tactical Air Navigation (VORTAC) facilities.
Jet Routes
The jet route system consists of routes established from 18,000 feet mean sea level
(MSL) (FL180) to 45,000 feet MSL (FL450) inclusive.
They are depicted on aeronautical charts and are identified by a J (spoken Jay) for jet
route followed by the airway number (e.g., J14).
Except in Alaska, jet routes are established solely on VOR or VORTAC navigation
facilities.
Controlled Airspace
A controlled airspace is an airspace of defined dimensions within which air traffic control
service is provided to instrument flight rules (IFR) flights and to visual flight rules (VFR)
flights in accordance with the airspace classification. There are five classifications of
controlled airspace: Class A, B, C, D, and E. Each class of airspace has associated
flight services. A sixth class of airspace, Class G, encompasses uncontrolled airspace.
Figure 6-1 shows a composite diagram of all the classifications, and the following
sections give a brief definition of each class of controlled airspace. Refer to FAA Order
7400.2, AIM, and the CFRs for more detailed information.
6-2
