What do I need to know about Class B airspace?

What are the characteristics of Class B airspace?

Generally, Class B Airspace extends from the altitude of the airport up to 10,000ft MSL. Laterally, it normally contains three different areas of airspace, laid out like an upside-down wedding cake. The bottom shelf is normally a cylinder, extending 10nm away from the airport, and going from the surface to the ceiling.

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How to read Class B airspace?

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Can I fly under Class B airspace without a transponder?

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”).

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How do you fly under Class B airspace?

Flying Under Class B Airspace: If you’re flying under Class B airspace (the dark blue area), you need to keep your speed throttled back to 200 kts or below. You don’t need to talk to Air Traffic Control to fly here, you just need to keep your speed down.

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What equipment is required in Class B?

A few pieces of equipment are crucial for flying in this airspace. For example, a two-way radio is the most significant requirement without which no entry is permitted to the airspace. Furthermore, an altitude-reporting transponder with ADS-B Out is required for two purposes: To provide separation within the class.

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Is there a speed limit in Class B airspace?

Speed Restrictions In/Around Class B Airspace If you’re below 10,000 feet, you need to meet the standard speed restriction of 250 knots. However, if you’re in Class B at 10,000′ MSL or higher, you can fly faster than 250 knots (though ATC usually restricts aircraft speed for traffic flow and separation).

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What is Class B airspace used for?

Class B airspace is generally airspace from the surface to 10,000 feet MSL surrounding the nation’s busiest airports in terms of airport operations or passenger enplanements.

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How do I know my Class B airspace floor?

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Can you fly over Class B airspace?

Generally, student and recreational pilots are not permitted to fly in Class B airspace, or to take off or land at a Class B airport.

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What is an example of Class B airspace?

Class B airspace surrounds the largest airports in the United States. Denver International (KDEN), Los Angeles International (KLAX), Chicago O’Hare (KORD), and Atlanta Hartsfield (KATL) are all examples of airports in Class B airspace.

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What is the symbol for Class B airspace?

On your sectional, horizontal Class B airspace limits are outlined in concentric solid blue circular lines that may be indented or extended in certain places due to geography or air traffic routes. The top and bottom of each layer of airspace, as you can see, are given in what looks like a fraction; for example, 90/40.

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Do you need Mode C under Class B?

Specifically, a Mode C transponder is required if you wish to operate in Class A, B, or C airspace, at an altitude of over 10,000′ MSL, or within a 30-nautical mile radius of the primary airport in Class B airspace.

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How wide is Class B airspace?

The dimensions of Class B airspace vary wildly from airport to airport, moreso than Class C and Class D airspace, but as a general rule it will extend around 30NM from the airport (however in some cases this is as few as 10NM and up to 40NM).

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Where do you need ADS-B?

As described in 14 CFR 91.225, ADS-B Out performance is required to operate in: Class A, B, and C airspace. Above the ceiling and within the lateral boundaries of a Class B or Class C airspace area upward to 10,000 feet MSL .

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How many airports are Class B airspace?

The airspace around the busiest US airports is classified as ICAO Class B, and the primary airport (one or more) for which this airspace is designated is called Class B airport. As of January 2023, there are 37 Class B airports in the United States.

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What does Charlie mean in aviation?

It simply means YES. Although not yet much used these days, you will often hear the word Charlie Charlie. Of course most pilots now use the phrase affirmative for yes, and negative for no.

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Can I fly under a Bravo?

An ATC clearance is required for all aircraft that receive separation services within the airspace. Even though you may be operating below the Bravo, you should use caution against operating too closely to the boundaries, especially where the floor of the Class B airspace is 3,000 feet or less above the surface.

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Can you fly VFR in Class B?

VFR aircraft must obtain an ATC clearance to operate in Class B airspace.

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What altitude does Class B airspace go to?

The upper limit of class B airspace is normally 10,000 feet (3,000 m) MSL. All aircraft entering class B airspace must obtain ATC clearance prior to entry and must be prepared for denial of clearance.

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What color is Class B airspace?

Around Class B airspace is an area called the Mode C Veil. It is shown as a thin blue concentric line of 30 Nautical Mile radius around the Class B airport. An altitude reporting Transponder (Mode C) is required within this area and when operating under the floor or above the ceiling of the Class B airspace.

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What is the range of Class B airspace?

The upper limit of the airspace should not exceed 10,000 feet MSL. However, high airport field elevation, adjacent high terrain, or operational factors may warrant a ceiling above 10,000 feet MSL.

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Is special VFR allowed in Class B airspace?

SVFR operations may be authorized for aircraft operating in or transiting a Class B, Class C, Class D, or Class E surface area when the primary airport is reporting VFR but the pilot advises that basic VFR cannot be maintained.

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Can you fly under Class B airspace without ads B?

I don’t have ADS-B Out, where can I fly? Without ADS-B Out, you can fly in any airspace except the ADS-B rule airspace defined by FAR 91.225 (see above). Note that ADS-B is not required in Class D airspace, or under a Class B or Class C airspace shelf, unless it lies within a Mode C veil.

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What does Class B airspace look like on a map?

Class B airspace is shown with a solid blue line around major airports in circles radiating outward. In the example above, the white arrows are pointing to each circle of the class B airspace. Each of these circles have different elevations that create an “upside down wedding cake” with each ‘layer’ of circles.

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What is a Class B corridor?

A VFR corridor is defined as airspace through Class B airspace, with defined vertical and lateral boundaries, in which aircraft may operate without an ATC clearance or communication with air traffic control. These corridors are, in effect, a “hole” through Class B airspace.

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At what altitude does airspace end?

Vertical boundary There is no international agreement on the vertical extent of sovereign airspace, with suggestions ranging from about 30 km (19 mi)—the extent of the highest aircraft and balloons—to about 160 km (100 mi)—approximately the lowest extent of short-term stable orbits.

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What airspace is uncontrolled?

Class G airspace (uncontrolled) is that portion of airspace that has not been designated as Class A, Class B, Class C, Class D, or Class E airspace. Rules governing VFR flight have been adopted to assist the pilot in meeting the responsibility to see and avoid other aircraft.

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How does ATC know your altitude?

A transponder is a little box mounted in the panel of your airplane where you can set a 4 digit code that ATC assigns to you. The purpose of this box is to tell ATC where you are and how high you are.

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