Class B Airspace, indicated by a solid blue line. Class B airspace is shown with a solid blue line around major airports in circles radiating outward.
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Class Bravo airspace (Class B) is that airspace surrounding the nation's busiest airports. Class B airspace supports both Instrument Flight Rules (IFR) and Visual Flight Rules (VFR) operations within.
The top number represents the ceiling of Class B airspace in hundreds of feet MSL. For example, if the top number is 120, it means the ceiling of Class B for that section is 12,000 feet MSL. The altitudes are inclusive, so if you're flying in that section at 12,000 feet MSL, you're in Class B.
Class B is a class of airspace in the United States which follows International Civil Aviation Organization (ICAO) airspace designation. Class B airspace areas are designed to improve aviation safety by reducing the risk of midair collisions in the airspace surrounding airports with high-density air traffic operations.
Class B Airspace AltitudeIn some high-altitude airports like Denver, the Class B ceiling extends up to 12,000 feet MSL. Atlanta is another example of an irregular Class B airspace ceiling altitude. Due to the high volume of air traffic, the Class B ceiling in Atlanta reaches up to 12,500 feet MSL.
An ATC clearance is required to enter and operate within Class B airspace. VFR pilots are provided sequencing and separation from other aircraft while operating within Class B airspace. AIM, Para 4-1-18, Terminal Radar Services for VFR Aircraft.
B - Economy/Coach – Usually an upgradable fare to Business. C - Business Class. D - Business Class Discounted. E - Shuttle Service (no reservation allowed) or Economy/Coach Discounted. F - First Class.
Class B airspace — Unrestricted at or above 10,000 feet msl, 250 kias below 10,000 feet msl. Beneath Class B or in VFR corridor through Class B — 200 kias. Procedure turn — 200 kias.
However, if you wish to operate in class A, B, or C airspace, or at an altitude of over 10,000' MSL, or within a 30 nautical mile radius of the primary airport in class B airspace, you will need a transponder and altitude encoder (commonly referred to as mode C).
You may fly without ADSB under the Class B or Class C shelf provided you remain outside of any Mode C veil. §91.225 tells you where you cannot fly. It says you cannot fly within the lateral boundaries of the Class B or C airspace or above the airspace.
Operating Rules and Pilot/Equipment Requirements. Regardless of weather conditions, an ATC clearance is required prior to operating within Class B airspace. Pilots should not request a clearance to operate within Class B airspace unless the requirements of 14 CFR Sections 91.131, 91.215, and 91.225 are met.
You must receive official clearance. Also, pilots must hold a minimum of a private pilot certification to enter Class B airspace. Sport pilots, recreational pilots, and student pilots are not authorized to operate in Class B airspace.