Question

The airspace directly overlying Addison Airport (ADS) is?

1) Class D up to 3,000 feet MSL
2) Class D up to but not including 3,000 MSL
3) Class E from the surface up to 3,000 feet MSL

Answer 1

Addison Airport (ADS) is encompassed by Class D airspace up to but not including 3,000 feet MSL, above which Class E airspace typically begins.

Step-by-step explanation:

The airspace directly overlying Addison Airport (ADS) is classified as Class D airspace up to but not including 3,000 feet MSL (Mean Sea Level). Class D airspace is generally from the surface to 2,500 feet above the airport elevation (charted in MSL) surrounding airports with an operational control tower. In this specific case, ADS's Class D airspace does not include 3,000 feet MSL, meaning that the boundary goes up to but does not include that altitude. Directly above the Class D airspace, the airspace will typically transition to Class E airspace.