How does the classification of airspace affect aircraft operating procedures?

The classification of airspace significantly affects aircraft operating procedures by dictating the requirements for pilot certification, aircraft equipment, communication, and air traffic control services within each airspace type. Airspace is classified based on its complexity and the level of air traffic control services provided. The primary airspace classifications are Class A, B, C, D, E, and G. Class A airspace generally extends from 18,000 feet MSL (Mean Sea Level) up to and including FL600 (Flight Level 600), and requires pilots to be instrument rated, flying IFR (Instrument Flight Rules), and in communication with ATC. Class B airspace surrounds the nation's busiest airports, and requires pilots to have at least a private pilot certificate or r....