What is the basic principle behind entering Class B airspace?

• A. Entry into Class B airspace is unrestricted.
• B. Two-way radio contact is sufficient to enter Class B.
• C. You must have an explicit ATC clearance to enter Class B airspace.
• D. A special waiver from the FAA is required.

Answer: (C)

Class B airspace is extremely controlled to manage the high traffic around major airports, so pilots must obtain explicit authorization from ATC before entering. ATC clearance is the formal permission that authorizes you to enter and gives you your route, altitude constraints, and any sequencing instructions, along with a discrete radar code for identification. You should have two-way radio communication with ATC continuously while inside and adhere to the clearance you’ve been given. Simply being able to contact ATC does not grant entry, and there’s no waiver that substitutes for obtaining the clearance.