Questions and Answers
What is Class G Airspace?
What identifies the starting altitude of Class E Airspace?
Magenta shading on the Sectional Chart
What is the vertical limit of Class D Airspace?
Approximately 2,500 feet AGL
Class C Airspace requires two-way radio communications equipment.
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What is the purpose of Class B Airspace?
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What do Restricted Areas indicate?
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What are Warning Areas located?
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What are Prohibited Areas?
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What do TFRs stand for?
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What do MOAs stand for?
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What should pilots do when flying in Alert Areas?
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What is a Controlled Firing Area?
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What is a Local Airport Advisory?
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What is the purpose of Military Training Routes (MTRs)?
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What is required for parachute jump aircraft operations?
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What are Published VFR routes used for?
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What does ADIZ stand for?
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What does FRZ stand for?
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What does NOAA stand for?
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Study Notes
Class G Airspace
- Uncontrolled airspace where ATC does not exercise control over traffic.
- Extends from surface to base of Class E airspace, typically 700 or 1,200 feet AGL.
- In western U.S. and Alaska, may extend from surface to 14,500 feet MSL, unless below 1,500 feet AGL.
Class E Airspace
- Identified on Sectional Charts by magenta shading (700 feet AGL) or no shading (1,200 feet AGL).
- Encompasses 14,500 feet to 17,999 feet, surface area at certain airports without control towers.
- Airway corridors extend from 1,200 feet AGL to 17,999 feet MSL, 4NM on either side of the centerline shown in blue.
Class D Airspace
- Extends from surface to approximately 2,500 feet AGL, with size depicted on sectional charts by a blue dashed line.
- Typically centered around airports, radius of 4 NM.
- Additional restrictions apply when ceiling is under 1,000 feet or visibility less than 3 statue miles.
Class C Airspace
- Consists of two concentric circles centered on the primary airport; inner area has a radius of 5 NM up to 4,000 feet AGL, outer shell is 10 NM radius from 1,200 feet AGL to 4,000 feet.
- Outer area extends 20 NM from the airport, providing advisory services.
- Requires two-way radio comms, transponder, and encoding altimeter for operation.
Class B Airspace
- Controlled airspace from surface to specified altitudes, centered around primary airports.
- Size and layout vary significantly, outlined in blue on sectional charts.
- ATC clearance required to operate within; pilots need at least a Private Pilot certificate for busy Class B airports.
Restricted Areas
- Designated for unusual and often invisible hazards such as gunfire and guided missiles.
- Unauthorized entry poses extreme risks; permission from controlling agency is required.
Warning Areas
- Contains hazardous activities located in international airspace.
- Similar to restricted areas, these are depicted on charts.
Prohibited Areas
- Airspace where aircraft flight is completely prohibited, such as around the White House.
TFRs (Temporary Flight Restrictions)
- Temporary restrictions due to VIP movements, special events, or natural disasters.
- Several TFRs may be active across the National Airspace System at any time.
MOAs (Military Operation Areas)
- Purpose-built airspace to separate military training activities from IFR traffic.
- Pilots should contact controlling agency for advisories before entering active MOAs.
Alert Areas
- High volume of pilot training or unusual aerial activities.
- Pilots are responsible for maintaining awareness to avoid collisions.
CFAs (Controlled Firing Area)
- Airspace for activities that are hazardous outside controlled conditions.
LAA (Local Airport Advisory)
- Provided by FSS for airports with discrete communication frequencies and automated weather reporting.
- Participation encouraged for enhanced safety.
MTR (Military Training Route)
- Designed for military low-altitude, high-speed training, established below 10,000 feet MSL.
- Operations inside identified by four-digit designators (VR for VFR and IR for IFR).
Parachute Jump Aircraft Operations
- Coordination needed for information regarding parachute jumps with other ATC facilities.
Published VFR Routes
- Designed for navigating complex airspace, found on VFR terminal area planning charts.
ADIZ (Air Defense Identification Zone)
- Airspace for identifying and controlling civil aircraft, extending beyond national territory for security.
FRZ (Flight Restricted Zone)
- Areas where operations are hazardous to drone flights due to hidden risks like artillery.
NOAA (National Oceanic and Atmospheric Administration)
- U.S. scientific agency focused on oceanic, waterway, and atmospheric conditions, under Department of Commerce.
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Description
Test your knowledge on the different classes of airspace including Class G, E, D, and C. This quiz covers their characteristics, altitudes, and how they are depicted on sectional charts. Perfect for aviation students and enthusiasts!
