Garmin Flight Deck 100 Manuel D’Utilisation

190-00728-04  Rev. A

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This airways discussion is based upon the North American airway structure.  The airway structure in places 

other than North America vary by location, etc. and are not discussed in this book.  Low Altitude Airways (or 
Victor Airways) primarily serve smaller piston-engine, propeller-driven airplanes on shorter routes and at lower 
altitudes.  Airways are eight nautical miles wide and start 1,200 feet above ground level (AGL) and extend up 
to 18,000 feet mean sea level (MSL). Low Altitude Airways are designated with a “V” before the airway number 
(hence the name “Victor Airways”) since they run primarily between VORs.

High Altitude Airways (or Jet Routes) primarily serve airliners, jets, turboprops, and turbocharged piston 

aircraft operating above 18,000 feet MSL.  Jet Routes start at 18,000 feet MSL and extend upward to 45,000 feet 
MSL (altitudes above 18,000 feet are called “flight levels” and are described as FL450 for 45,000 feet MSL).  Jet 
Routes are designated with a “J” before the route number.

Low Altitude Airways are drawn in gray (the same shade used for roads).  High Altitude Airways are drawn 

in green.  When both types of airways are displayed, High Altitude Airways are drawn on top of Low Altitude 
Airways.

When airways are selected for display on the map, the airway waypoints (VORs, NDBs and Intersections) are 

also displayed.