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Questions and Answers
What are the dimensions of Class A airspace?
What are the dimensions of Class A airspace?
- Surface to 2,500 ft AGL
- 18,000 ft MSL up to and including FL600 (correct)
- Surface to 10,000 ft MSL
- Surface to 4,000 ft AGL
What is the upper limit of Class B airspace?
What is the upper limit of Class B airspace?
10,000 ft MSL
What are the dimensions of Class C airspace?
What are the dimensions of Class C airspace?
Surface to 4,000 ft AGL and 10 NM outer circle from 1,200 ft AGL to 4,000 ft AGL
What is the minimum height of Class D airspace when the tower is operational?
What is the minimum height of Class D airspace when the tower is operational?
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What is true about Class E airspace?
What is true about Class E airspace?
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Class G airspace is controlled airspace.
Class G airspace is controlled airspace.
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Study Notes
Class A Airspace Dimensions
- Extends from 18,000 feet MSL to FL600.
- Includes airspace over waters within 12 nautical miles of the contiguous US and Alaska.
Class B Airspace Dimensions
- Ranges from the surface up to 10,000 feet MSL or as depicted.
- Tailored specifically for each airport.
- Indicated on VFR sectional charts with solid blue lines or circles, featuring a 30 NM Mode C veil.
Class C Airspace Dimensions
- Extends from the surface to 4,000 feet AGL or as depicted.
- Displayed using two magenta-colored circles.
- 5 NM inner circle (core): Surface to 4,000 feet AGL.
- 10 NM outer circle (shelf): 1,200 feet AGL to 4,000 feet AGL.
- Includes a 20 NM procedural outer area that is not depicted.
Class D Airspace Dimensions
- Ranges from the surface to 2,500 feet AGL above the airport when a tower is operational.
- Depicted with a single blue dashed circle, typically 4-5 NM radius.
- May have extensions categorized as Class D or Class E for instrument approaches:
- If the extension is less than 2 NM, it is Class D.
- If greater than 2 NM, it is Class E.
Class E Airspace Dimensions
- Generally controlled airspace not classified as A, B, C, or D.
- No set dimensions; typically, the base is 1,200 feet AGL or 700 feet AGL in certain areas.
- Extends up to but not including 18,000 feet MSL.
- All airspace above FL600 is considered Class E.
Class G Airspace Dimensions
- Represents uncontrolled airspace.
- Extends from the surface up to the overlying Class E airspace.
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