Which airspace begins above Class G and extends to 18,000 feet, unless a transitional airspace descends to 700 feet AGL, as depicted by a thick faded magenta line?

Which airspace begins above Class G and extends to 18,000 feet, unless a transitional airspace descends to 700 feet AGL, as depicted by a thick faded magenta line?

• A. Class C
• B. Class B
• C. Class E
• D. Class D

Answer: (C)

Class E is the airspace that sits above Class G and extends upward to the base of Class A at 18,000 feet MSL. It’s the controlled airspace that accommodates IFR and weather operations across much of the country. The thick faded magenta line on charts marks a transition area where Class E begins at 700 feet AGL instead of a higher base, so inside that boundary the base is 700 AGL, while outside the boundary the base is higher or designated differently. That combination fits Class E: it starts above Class G and goes up to 18,000 feet, with a lowered base in transition areas shown by the magenta shading.

Class E is the airspace that sits above Class G and extends upward to the base of Class A at 18,000 feet MSL. It’s the controlled airspace that accommodates IFR and weather operations across much of the country. The thick faded magenta line on charts marks a transition area where Class E begins at 700 feet AGL instead of a higher base, so inside that boundary the base is 700 AGL, while outside the boundary the base is higher or designated differently. That combination fits Class E: it starts above Class G and goes up to 18,000 feet, with a lowered base in transition areas shown by the magenta shading.