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Class B Airspace Floors

Outside the surface area of Class B, a higher Class B shelf may begin at an altitude above the surface. A drone flying below that shelf, outside controlled surface airspace, is

  • A.automatically in violation of 107.41
  • B.required to descend into the shelf to obtain authorization
  • C.not inside Class B, though the pilot must still confirm the airspace actually at the site
Correct answer

C. not inside Class B, though the pilot must still confirm the airspace actually at the site

Why

Class B only occupies the volumes inside its charted shelves, so airspace below a shelf floor is whatever class is charted there, often Class E or G. The pilot still verifies the actual class at the site rather than assuming from the shelf overhead.

Source: FAA-G-8082-22 Ch. 2 · ACS knowledge area: Airspace Classification and Operating Requirements · From the Airspace & Flight Restrictions practice bank (AIR-053).

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