Class B is the airspace from the surface to 10,000 ft. MSL around the U.S.’s busiest airports. Examples of Class B airports include LAX (Los Angeles), SFO (San Francisco), and DEN (Denver).

Class B Operating Rules and Equipment Requirements (FAR 91.131)

  • ATC clearance required before operating in Class B Airspace.

  • Two-way radio communication is required.

  • A Mode C transponder is required within and above the lateral limits of Class B airspace and within 30 NM of the primary airport regardless of altitude.

  • The PIC has to be a private pilot or a student or recreational pilot who is with a CFI.

Class B Airspace Depiction and Symolology

  • Class B airspace is depicted with solid blue radials and arcs.

  • The name of the Class B airspace is shown in blue block letters, all capitalized. 

  • The MSL ceiling and floor altitudes of each section are shown in solid blue figures the last two zeros omitted.

  • Floors that are “upward and above” a certain altitude are preceded by a +.

Class B Screenshot

VFR Cloud Clearance and Visibility Requirements

To operate VFR within class B airspace, the pilot must maintain:

  • 3 statute miles visibility
  • Clear of clouds

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