Airspace & ChartsQuestion 41 of 100
A remote pilot applicant is reviewing the vertical structure of the National Airspace System. Which statement correctly describes the vertical limits of Class A airspace?
a.It extends from the surface up to and including 10,000 ft MSL nationwide
b.It extends from 18,000 ft MSL up to and including FL600 over the contiguous states
c.It extends from 14,500 ft MSL up to but not including 18,000 ft MSL
d.It extends from 700 ft AGL up to but not including 18,000 ft MSL
Explanation
Class A airspace begins at 18,000 ft MSL and continues up to and including FL600, and every operation inside it is flown under instrument flight rules. The block from 14,500 ft MSL to 18,000 ft MSL is generally Class E, not Class A. The 700 ft AGL and surface figures describe Class E floors and surface areas, and no airspace class uses a nationwide 10,000 ft MSL ceiling.
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