What must a pilot obtain to enter Class B airspace?

To enter Class B airspace, a pilot must obtain an ATC clearance. Class B airspace is usually found around major airports and is designed to manage the high volume of air traffic arriving and departing from those airports. Because of the density of traffic and the potential for conflicts, air traffic control has specific procedures in place for safely managing aircraft in this airspace.

When a pilot seeks clearance to enter Class B airspace, they must communicate with the appropriate air traffic control facility. This involves using proper radio communication techniques to request and receive authorization. The clearance will provide the pilot with not only permission to enter the airspace but also instructions regarding the specific route or altitude to maintain while within that airspace.

The other options, such as standard operating procedures or flight recommendations, do not pertain to the requirement for entering Class B airspace, as they relate more to general aviation practices rather than specific regulatory requirements. Similarly, a special waiver is not a common necessity for entry into Class B airspace, as the established protocol for access is through obtaining that ATC clearance.