However Class C has different symbols as it is applied for small and less busy airports but both still have the same upside-down cake shape.Ĭlass D: represented as blue dashed, which is for the smallest airport in the nation.Ĭlass E: refers to all other controlled airspace zones that aren’t covered by the previous categories. There is a slight difference between Class B and C. The geometry of Class B airspace varies from airport to airport, although it usually takes the shape of an upside-down cake, with the biggest layers at the highest altitudes.Ĭlass C: represented as solid magenta line. Because these airports have some of the biggest aviation traffic volumes in the country, you can expect Class B airspace to be the most extensive.
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Commercial airlines often use this airspace for long-haul flights.Ĭlass B: represented as a solid blue line that encompasses the nation’s busiest airports, as well as important air travel hubs in major cities.
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However, because of the smaller scale, it has less information. These graphs are similar to sectional graphs and use the same symbols. They have a scale of 1:1,000,000 and cover a huge area.