Which airspace is controlled by ATC but traditional aircraft do not need ATC clearances?

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

Answer: (D)

Clearance rules depend on the airspace class. In Class E, ATC has control and can provide separation, but for standard Visual Flight Rules operations, you don’t have to obtain ATC clearance to enter. IFR flights, however, must be cleared.

The other types either require explicit entry clearance for most operations (Class B, Class C, Class D) or are uncontrolled (Class G), which isn’t ATC-controlled airspace.

So the airspace described is Class E.