VFR Chart Notation
Specific conventions are used to indicate airspace boundaries on VFR sectional and terminal area charts (TACs) for the United States.
Read more about this topic: Airspace Class (United States)
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“Perhaps in His wisdom the Almighty is trying to show us that a leader may chart the way, may point out the road to lasting peace, but that many leaders and many peoples must do the building.”
—Eleanor Roosevelt (1884–1962)