Question

What class airspace does not require approval before entering?

1) Class A
2) Class B
3) Class C
4) Class G

Answer 1

Class G airspace does not require approval before entering, in contrast to Class A, B, and C airspaces where air traffic control interaction is necessary.

Step-by-step explanation:

The class of airspace that does not require approval before entering is Class G airspace. Class G is uncontrolled airspace where air traffic control does not provide service, and therefore pilots can enter without having to obtain prior approval. In contrast, Class A airspace requires an instrument flight rules (IFR) flight plan and clearance from ATC, Class B requires a clearance from air traffic control (ATC) due to the high-density traffic near major airports, and Class C also typically requires two-way radio communication with ATC because it is around airports that have moderate to high traffic.