Airways

• based on a centerline that extends from one navigational aid NAVAID/waypoint/fix/intersection to another NAVAID/waypoint/fix/intersection

• includes the airspace within parallel boundary lines 4 NM to each side of the centerline

• floor of 1,200' AGL, unless otherwise specified

• 1,200' AGL - 17,999' MSL

• Published on sectional and low en route charts

• 'V123' – N/S odd number, E/W even number

• May coincide with other victor airways  V123-246

• Published on both en route low and high charts

• Depicted in aeronautical blue

• High altitude 'Q123'

• Low altitude  'T123'

• May be flown under IFR if approved by ATC

• Can only be approved in a radar environment

• Navigation is the responsibility of the pilot

• Direct routes between waypoints –

  • latitude/longitude coordinates, degree-distance fixes, or offsets from established routes/airways at a specified distance and direction

Tower En Route Control program

• Overlapping approach control radar services to provide IFR clearances

• Routed by airport control towers

• Abbreviated filing procedures and reduced traffic separation requirements

• 18,000' MSL - FL450

• Published on high altitude en route charts

• 'J12'

• Below 10,000' MSL

• Operations in excess of 250 KN

• 'IR' IFR route, 'VR' visual route

• No segment above 1,500' AGL  IR-1234

• Segments above 1,500' AGL  IR-123

• All MTRs above 1,500' AGL charted