Which statement about Class E airspace is accurate?

Which statement about Class E airspace is accurate?

• A. It is high level controlled airspace above FL600 where IFR and VFR are permitted.
• B. It requires two-way radio communication prior to entry.
• C. It has a 10 nm radius around most airports.
• D. Transponder may be required.

Answer: (D)

Transponder may be required in Class E airspace to help ATC identify traffic and provide separation, especially in areas designed for instrument flight or where airways are involved. This makes it the best choice because, while not every portion of Class E requires a transponder for VFR, there are segments where ATC mandates one or requests it for IFR operations. The other statements aren’t generally true: Class A ends at FL600, so describing airspace above that as a high-level Class E scenario isn’t accurate; there isn’t a universal 10 nautical mile radius around airports defining Class E; and entering Class E usually does not require two-way radio communication for VFR, though IFR flights do require communication with ATC.

Transponder may be required in Class E airspace to help ATC identify traffic and provide separation, especially in areas designed for instrument flight or where airways are involved. This makes it the best choice because, while not every portion of Class E requires a transponder for VFR, there are segments where ATC mandates one or requests it for IFR operations. The other statements aren’t generally true: Class A ends at FL600, so describing airspace above that as a high-level Class E scenario isn’t accurate; there isn’t a universal 10 nautical mile radius around airports defining Class E; and entering Class E usually does not require two-way radio communication for VFR, though IFR flights do require communication with ATC.