US Airspace Classes: The Complete Pilot's Guide
By Renzo, CPL · Updated March 2026
Understanding airspace is one of the most critical skills every pilot must master. Whether you are a student pilot preparing for your knowledge test, a private pilot planning a cross-country, or a commercial pilot operating in complex terminal environments, knowing exactly where you can fly, what equipment you need, and what weather minimums apply is non-negotiable. This guide covers every class of US airspace, the rules that govern each, and how to identify them on a sectional chart.
Last updated: March 2026 · Sources: FAR Part 71, FAR Part 91, AIM Chapter 3
Controlled vs. Uncontrolled Airspace
The entire US National Airspace System (NAS) is divided into two broad categories: controlled airspace and uncontrolled airspace. The distinction is straightforward — in controlled airspace, Air Traffic Control (ATC) provides separation services and may require communication, clearance, or both. In uncontrolled airspace, ATC does not provide separation services and pilots are entirely responsible for seeing and avoiding other traffic.
Controlled Airspace
- --Class A: FL180 to FL600
- --Class B: Major airports
- --Class C: Medium airports
- --Class D: Towered airports
- --Class E: Everything else that is controlled
Uncontrolled Airspace
- --Class G: Surface to 700 or 1,200 AGL
- --No ATC separation services
- --Lowest VFR minimums (day)
- --Pilot is solely responsible for traffic
- --Most common at low altitudes in rural areas
The reason airspace exists in its current structure is safety. Around busy airports, ATC needs to control who enters and when. At cruise altitudes, all aircraft need to be on IFR flight plans with ATC separation. In rural areas at low altitudes, the traffic density is low enough that pilots can manage their own separation visually. The airspace system matches the level of ATC service to the level of traffic density and risk. A helpful mnemonic for remembering the order from most restrictive to least restrictive is simply the alphabet: A, B, C, D, E, G (there is no Class F in the US).
Class A Airspace
Altitude
FL180 to FL600
Flight Rules
IFR only
Clearance
Required
ATC Separation
All aircraft
Class A airspace extends from 18,000 feet MSL (Flight Level 180) to Flight Level 600 (approximately 60,000 feet). It covers the entire contiguous United States and Alaska, including the waters within 12 nautical miles of the coastline. All flight in Class A must be conducted under Instrument Flight Rules (IFR). There is no VFR flight permitted in Class A airspace under any circumstances.
To operate in Class A, a pilot must hold at least an instrument rating, file an IFR flight plan, receive an ATC clearance, and the aircraft must be equipped with a two-way radio, a transponder with Mode C altitude reporting, and ADS-B Out. All altitudes in Class A are expressed as flight levels (FL180, FL250, etc.), which are based on a standard altimeter setting of 29.92 inches of mercury. When climbing through 18,000 feet MSL, pilots set their altimeter to 29.92 regardless of the actual local altimeter setting.
ATC provides separation between all aircraft in Class A. Standard vertical separation is 1,000 feet between aircraft below FL410 and 2,000 feet above FL410 (though RVSM has reduced this to 1,000 feet between FL290 and FL410 for equipped aircraft). Lateral separation standards also apply. Class A is not depicted on VFR sectional charts because VFR flight is not permitted — it is, however, shown on IFR en route high altitude charts.
Class B Airspace
Shape
Upside-down wedding cake
Clearance
Required
VFR Visibility
3 statute miles
Cloud Clearance
Clear of clouds
Class B airspace surrounds the nation's busiest airports — think LAX, JFK, ORD, ATL, DFW, and about 30 others. The shape resembles an upside-down wedding cake (or layered cylinder) with multiple shelves at different altitudes, wider at the top and narrower at the bottom. The innermost cylinder typically extends from the surface to 10,000 feet MSL, while outer shelves may begin at 3,000, 5,000, or 7,000 feet MSL.
To enter Class B airspace, you must receive an explicit ATC clearance. The controller must say "cleared into Class Bravo airspace" or equivalent phraseology. Simply being in radio contact or being told to "stand by" is not sufficient. Both VFR and IFR flights are permitted, but all traffic receives ATC separation services. For VFR flights, the visibility minimum is 3 statute miles and you must remain clear of clouds — notably the simplest cloud clearance requirement of any controlled airspace because ATC is separating everyone.
The Mode C veil is a critical concept associated with Class B. It extends in a 30 nautical mile radius from the primary Class B airport, from the surface to 10,000 feet MSL. Within this veil, all aircraft must have a transponder with Mode C (altitude reporting) and ADS-B Out equipment, even if they never enter the actual Class B airspace. This exists so that ATC and TCAS systems can see all traffic in the vicinity of these congested airports.
Student pilots may operate in certain Class B areas with specific training and a logbook endorsement from their instructor (per FAR 61.95), but some Class B airports — listed in FAR Part 91, Appendix D — prohibit student pilot operations entirely. Private pilots and above may operate in any Class B with the required clearance and equipment.
On sectional charts, Class B airspace is depicted with solid blue lines surrounding the airport. Each shelf is labeled with its ceiling and floor altitudes (e.g., "100/40" means the ceiling is 10,000 MSL and the floor is 4,000 MSL, in hundreds of feet).
Class C Airspace
Shape
Two concentric rings
Entry Requirement
Radio contact
VFR Visibility
3 statute miles
Cloud Clearance
500/1,000/2,000
Class C airspace surrounds airports that have an operating control tower, radar approach control, and meet certain traffic volume thresholds — typically airports with scheduled airline service but less traffic than Class B airports. Examples include airports like Portland (PDX), San Diego (SAN before its upgrade to B), Raleigh-Durham (RDU), and Nashville (BNA).
The standard Class C configuration consists of two concentric circles. The inner core (surface area) has a 5 nautical mile radius from the airport and extends from the surface up to approximately 4,000 feet AGL. The outer shelf extends from 1,200 feet AGL to 4,000 feet AGL with a 10 nautical mile radius. Some Class C airspace also has an outer area (20 NM radius) where participation is recommended but not required.
To enter Class C, you must establish two-way radio communication with the approach control facility. Unlike Class B, you do not need a specific clearance — you just need ATC to acknowledge your callsign. If the controller says "N12345, stand by," communication is established. If the controller says "aircraft calling, stand by," communication is not established because they have not identified you specifically.
Equipment requirements include a two-way radio, transponder with Mode C, and ADS-B Out. VFR weather minimums are 3 statute miles visibility and standard cloud clearance of 500 feet below, 1,000 feet above, and 2,000 feet horizontal from clouds. On sectional charts, Class C is depicted with solid magenta circles with altitude annotations.
Class D Airspace
Radius
~4 NM
Ceiling
~2,500 ft AGL
VFR Visibility
3 statute miles
Entry Requirement
Communication
Class D airspace surrounds airports that have an operating control tower but do not have radar approach control. These are typically smaller towered airports — the kind you will encounter frequently during flight training. The standard configuration is a cylinder with approximately a 4 nautical mile radius from the airport, extending from the surface to approximately 2,500 feet AGL (the exact ceiling varies and is charted).
The entry requirement for Class D is establishing two-way radio communication with the control tower. The same rules apply as Class C regarding what constitutes "established communication." Many Class D airports revert to Class E or Class G when the tower is closed (typically at night). When the tower closes, the dashed blue line on the chart effectively becomes a dashed magenta line (Class E) or the airspace reverts to Class G, depending on the airport. Always check NOTAMs and the Chart Supplement for tower operating hours.
VFR weather minimums in Class D are 3 statute miles visibility and cloud clearance of 500 feet below, 1,000 feet above, and 2,000 feet horizontal. Unlike Class B and C, a transponder with Mode C and ADS-B Out are not required in Class D airspace itself — unless the Class D sits within the Mode C veil of a nearby Class B airport or beneath a Class B or C shelf. Always check the specific requirements for each airport.
On sectional charts, Class D is depicted with a dashed blue line. The number in brackets near the airport shows the ceiling in hundreds of feet MSL (e.g., "[25]" means the Class D ceiling is 2,500 feet MSL).
Class E Airspace
Coverage
Most of US
Default Floor
1,200 ft AGL
Clearance
Not required
Radio
Not required
Class E is the most expansive and often the most confusing airspace class. It is essentially all controlled airspace that is not classified as A, B, C, or D. The majority of the airspace above 1,200 feet AGL across the contiguous United States is Class E. It exists to provide a controlled environment for IFR traffic while allowing VFR pilots to operate without requiring communication or a clearance from ATC.
Class E has several different floor altitudes depending on location:
- --Surface (SFC): Around non-towered airports that have instrument approach procedures. Depicted by a dashed magenta line on the sectional chart. This provides controlled airspace protection for aircraft flying instrument approaches down to the surface.
- --700 feet AGL: Transition areas around airports with instrument approaches. Depicted by a magenta-tinted (shaded) area on the sectional. The magenta shading indicates the floor of Class E drops from 1,200 AGL down to 700 AGL in that area.
- --1,200 feet AGL: The default floor across most of the US. No special depiction on the chart — the absence of magenta shading means Class E starts at 1,200 AGL.
- --14,500 feet MSL: Over areas where Class E would otherwise not exist below 14,500 (rare, primarily in parts of the western US).
Federal airways (Victor airways) are also Class E airspace. They extend from 1,200 feet AGL to 17,999 feet MSL and are 8 nautical miles wide (4 NM on each side of the centerline). These airways connect VOR stations and are used primarily by IFR traffic.
VFR weather minimums in Class E below 10,000 feet MSL are 3 statute miles visibility and 500 feet below, 1,000 feet above, and 2,000 feet horizontal from clouds. Above 10,000 feet MSL, these increase to 5 statute miles visibility and 1,000 feet below, 1,000 feet above, and 1 statute mile horizontal. No radio communication, transponder, or clearance is required in Class E (unless above 10,000 feet MSL where a transponder with Mode C is required, or within other requirement areas). See the sectional chart reading guide for detailed chart identification.
Class G Airspace
Type
Uncontrolled
Typical Ceiling
700 or 1,200 AGL
ATC Services
None
Day VFR Vis (below 1,200)
1 statute mile
Class G is uncontrolled airspace. ATC does not provide separation services, and there is no communication requirement. It exists from the surface up to the base of the overlying Class E airspace, which is typically 700 feet AGL (near airports with instrument approaches) or 1,200 feet AGL (the default across most of the US). In remote areas, particularly in parts of the western United States, Class G can extend up to 14,500 feet MSL.
Class G has the lowest VFR weather minimums of any airspace during daytime operations. During the day at or below 1,200 feet AGL, you only need 1 statute mile of flight visibility and must remain clear of clouds. This is the only airspace where "clear of clouds" is the minimum cloud clearance requirement during the day. At night in the same altitude band, the requirements increase to 3 statute miles visibility and 500 feet below, 1,000 feet above, and 2,000 feet horizontal from clouds.
Above 1,200 feet AGL but below 10,000 feet MSL, Class G daytime requirements are 1 statute mile visibility and 500/1,000/2,000 cloud clearance. At night, visibility increases to 3 statute miles. Above 10,000 feet MSL, Class G has the same requirements as Class E: 5 statute miles visibility and 1,000/1,000/1 SM cloud clearance.
Class G is not directly depicted on sectional charts — it is defined by the absence of other airspace. If you see no blue or magenta shading, no dashed lines, and no airspace boundaries, the surface airspace is Class G up to 1,200 feet AGL. Where magenta shading exists, Class G only extends from the surface to 700 feet AGL before Class E begins.
Special Use Airspace
Special Use Airspace (SUA) encompasses areas where activities must be confined because of their nature, or where limitations are imposed on aircraft that are not participating in the activities. SUA is defined in FAR Part 73 and depicted on sectional charts.
Prohibited Areas (P)
Flight is completely prohibited. These are established for national security or welfare. The most well-known is P-56 over the White House and Capitol in Washington, D.C. There are very few prohibited areas in the US. They are depicted on charts with blue hatching and labeled with a 'P' prefix (e.g., P-56).
Restricted Areas (R)
Contain hazardous activities such as artillery firing, aerial gunnery, or missile testing. Flight is not permitted when the restricted area is 'hot' (active) without authorization from the controlling agency. You can contact the controlling agency or check NOTAMs for active times. When cold (inactive), you may fly through. Depicted with blue hatching and an 'R' prefix (e.g., R-2301).
Military Operations Areas (MOAs)
Areas established to separate military training activity from IFR traffic. VFR pilots may fly through MOAs, but extreme caution is advised — military jets may be conducting high-speed, high-G maneuvers. IFR traffic will be rerouted around active MOAs by ATC. Depicted with magenta hatching on sectional charts.
Warning Areas (W)
Similar to restricted areas but located over international waters (beyond 3 NM from the coast). They contain activity that may be hazardous to non-participating aircraft. Because they are outside US domestic airspace, the same regulatory restrictions do not apply, but the dangers are real. Depicted with blue hatching and a 'W' prefix.
Alert Areas (A)
Established to advise pilots of areas with a high volume of pilot training or unusual aerial activity. There are no entry requirements or restrictions — pilots simply need to be aware and exercise extra vigilance. Depicted on charts with blue hatching and an 'A' prefix.
Controlled Firing Areas (CFAs)
Areas where ground-based firing or other activities take place. Unique because they are NOT depicted on charts. Instead, the controlling agency is responsible for suspending activity when an aircraft is spotted approaching the area. Pilots do not need to take any action regarding CFAs.
Other Airspace Areas
Beyond the standard classes and SUA, there are several other types of airspace and areas that pilots must understand.
Temporary Flight Restrictions (TFRs)
TFRs are established for temporary hazards such as wildfire suppression, VIP movements (presidential TFRs), major sporting events (stadium TFRs within 3 NM up to 3,000 AGL), space launches, and disaster relief. TFRs are published as NOTAMs and are the pilot's responsibility to check before every flight. Busting a TFR — especially a presidential TFR — can result in intercept by military aircraft, certificate action, and even criminal prosecution. Always check notams.faa.gov or use ForeFlight/Garmin Pilot before every flight.
VFR Corridors and Flyways
VFR corridors are tunnels of airspace cut through Class B that allow VFR transit without a clearance. They have specific altitude and lateral boundaries that must be followed precisely. VFR flyways are suggested routes depicted on the back of terminal area charts that allow VFR pilots to navigate around Class B without entering it. Unlike corridors, flyways are advisory and not regulatory — they represent recommended routes but are not mandatory.
Terminal Radar Service Areas (TRSAs)
TRSAs are areas where radar service is available to VFR pilots on a voluntary basis. They are depicted on sectional charts with a dark gray circle. There are no regulatory requirements to contact ATC in a TRSA, but it is highly recommended for traffic advisories and safety. TRSAs predate the current airspace classification system and are gradually being converted to Class C or eliminated.
Air Defense Identification Zones (ADIZ)
ADIZ is airspace over land or water where identification, location, and control of aircraft is required for national security. A DVAR (Defense VFR) flight plan is required before entering the ADIZ under VFR. The Washington DC ADIZ (now called the Special Flight Rules Area, SFRA) is the most well-known and has specific training and equipment requirements for all pilots operating within its boundaries.
VFR Weather Minimums by Airspace
This table summarizes the VFR visibility and cloud clearance requirements for every class of airspace. Memorizing this table is essential for any FAA knowledge test and for safe VFR flight operations. The general pattern: the busier and higher the airspace, the more restrictive the weather minimums.
| Airspace | Visibility | Cloud Clearance | Notes |
|---|---|---|---|
| Class A | N/A (IFR only) | N/A (IFR only) | VFR flight not permitted |
| Class B | 3 statute miles | Clear of clouds | Clearance required |
| Class C | 3 statute miles | 500 ft below, 1,000 ft above, 2,000 ft horizontal | Radio contact required |
| Class D | 3 statute miles | 500 ft below, 1,000 ft above, 2,000 ft horizontal | Communication required |
| Class E (below 10,000 MSL) | 3 statute miles | 500 ft below, 1,000 ft above, 2,000 ft horizontal | Most common controlled airspace |
| Class E (at/above 10,000 MSL) | 5 statute miles | 1,000 ft below, 1,000 ft above, 1 statute mile horizontal | Higher minimums above 10,000 MSL |
| Class G (day, 1,200 AGL or below) | 1 statute mile | Clear of clouds | Least restrictive |
| Class G (night, 1,200 AGL or below) | 3 statute miles | 500 ft below, 1,000 ft above, 2,000 ft horizontal | Night requires more |
| Class G (day, above 1,200 AGL, below 10,000 MSL) | 1 statute mile | 500 ft below, 1,000 ft above, 2,000 ft horizontal | Day above 1,200 AGL |
| Class G (night, above 1,200 AGL, below 10,000 MSL) | 3 statute miles | 500 ft below, 1,000 ft above, 2,000 ft horizontal | Night above 1,200 AGL |
| Class G (above 10,000 MSL) | 5 statute miles | 1,000 ft below, 1,000 ft above, 1 statute mile horizontal | Same as Class E above 10,000 |
Practice these minimums with our free practice test. Airspace questions are among the most tested topics on the FAA written exam.
Airspace on Sectional Charts
Identifying airspace on a VFR sectional chart is a skill every pilot must develop. The FAA uses a consistent color and line-style system to depict airspace boundaries. Here is how to identify each class on a sectional chart.
| Airspace | Chart Depiction | Key Identification |
|---|---|---|
| Class A | Not depicted on sectional charts | Uniformly FL180-FL600; shown on IFR high altitude charts |
| Class B | Solid blue lines | Layered shelves with altitude labels (e.g., 100/40) |
| Class C | Solid magenta circles | Two rings with altitude annotations, typically 5 NM / 10 NM |
| Class D | Dashed blue line | Number in brackets shows ceiling (e.g., [25] = 2,500 MSL) |
| Class E (surface) | Dashed magenta line | Around non-towered airports with instrument approaches |
| Class E (700 AGL) | Magenta shading (tint) | Faded magenta area indicates E starts at 700 AGL |
| Class E (1,200 AGL) | No depiction (default) | Absence of shading = Class E begins at 1,200 AGL |
| Class G | No depiction (below Class E) | Surface to 700 or 1,200 AGL depending on overlying E |
For a deeper dive into reading sectional charts, see our complete sectional chart reading guide.
Equipment Requirements by Airspace
Different airspace classes have different equipment requirements. The most critical equipment considerations are the transponder (Mode C altitude reporting), ADS-B Out, and two-way radio. Since January 2020, ADS-B Out is required in the same airspace where a Mode C transponder is required. Here is a summary.
| Airspace | Transponder | ADS-B Out | Radio | Notes |
|---|---|---|---|---|
| Class A | Required (Mode C) | Required (ADS-B Out) | Required | IFR equipment required |
| Class B | Required (Mode C) | Required (ADS-B Out) | Required | Mode C veil extends 30 NM from primary airport |
| Class C | Required (Mode C) | Required (ADS-B Out) | Required | Two-way radio and transponder with altitude reporting |
| Class D | Not required* | Not required* | Required | *Unless within Mode C veil or Class B/C above |
| Class E (at/above 10,000 MSL) | Required (Mode C) | Required (ADS-B Out) | Not required | Transponder required at and above 10,000 MSL (excl. below 2,500 AGL) |
| Class E (below 10,000 MSL) | Not required* | Not required* | Not required | *Unless within Mode C veil or other requirement area |
| Class G | Not required* | Not required* | Not required | *Unless within Mode C veil |
Remember: the Mode C veil around Class B airports requires transponder and ADS-B even in Class D, E, or G airspace within 30 NM of the primary airport. This catches many pilots off guard. When in doubt about equipment requirements for a specific flight, reference FAR 91.215 (transponder) and FAR 91.225 (ADS-B).
Speed Restrictions
The FAA imposes speed restrictions in certain airspace to reduce closure rates and give pilots more time to see and avoid other traffic. These restrictions are defined in FAR 91.117 and are frequently tested on FAA written exams.
Below 10,000 feet MSL
250 knots indicated airspeed (KIAS)Applies to all aircraft everywhere in the US below 10,000 MSL, including inside and outside of controlled airspace. This is the most fundamental speed restriction. Above 10,000 MSL, there is no general speed limit.
Within 4 NM and below 2,500 AGL of Class C or D airport
200 knots indicated airspeed (KIAS)This applies within 4 nautical miles of the primary airport of a Class C or D airspace and at or below 2,500 feet AGL. The purpose is to reduce speeds in the traffic pattern area where aircraft are maneuvering at low altitude.
Beneath Class B airspace or in a VFR corridor
200 knots indicated airspeed (KIAS)Aircraft flying beneath the lateral limits of Class B airspace (under the shelf) or in a VFR corridor through Class B are limited to 200 KIAS. This keeps speeds manageable in areas where VFR traffic may be compressed beneath the Class B floor.
Inside Class B airspace
250 knots indicated airspeed (KIAS)The standard below-10,000 limit of 250 KIAS applies inside Class B. ATC may assign specific speeds for sequencing. Turbine aircraft may request higher speeds with ATC approval in some cases.
5 Common Student Pilot Airspace Mistakes
1.Busting Class B Without a Clearance
This is the most serious airspace violation student pilots make. Class B requires explicit ATC clearance — the controller must say 'cleared into Class Bravo airspace.' Simply being in radio contact is not enough. Flying near Class B boundaries without understanding the vertical and lateral limits shown on the chart is a recipe for a violation. Always study the sectional chart and know the exact altitudes and boundaries before flying near Class B airports.
2.Confusing Communication vs. Clearance Requirements
Class C requires two-way radio communication (not a clearance), Class D requires communication, and Class B requires an explicit clearance. Many students mix these up. In Class C, if ATC says your callsign, you have established communication. In Class B, you must hear 'cleared into Bravo airspace' specifically. Getting this wrong can result in an airspace violation or, worse, a near-miss with airline traffic.
3.Not Knowing the Mode C Veil Boundaries
The 30 NM Mode C veil around Class B airports requires a transponder with altitude reporting even if you are flying beneath the Class B shelf in Class E or G airspace. Students who fly without a working transponder inside this ring can face enforcement action. Before every flight near a major airport, check whether you are within the Mode C veil and ensure your transponder and ADS-B are functioning.
4.Forgetting Class E Exists at the Surface
Many non-towered airports with instrument approach procedures have Class E airspace extending to the surface (depicted by a dashed magenta line on the chart). Students often assume that all non-towered airports sit in Class G. This matters because VFR weather minimums are higher in Class E than in Class G — 3 SM visibility and 500/1,000/2,000 cloud clearance instead of 1 SM and clear of clouds. Flying in Class E conditions that only meet Class G minimums is a regulatory violation.
5.Ignoring Altitude-Based Rules Above 10,000 MSL
When flying above 10,000 feet MSL, both visibility and cloud clearance requirements increase (5 SM visibility, 1,000 ft below/above, 1 SM horizontal from clouds), and a transponder with Mode C is required. Students planning mountain flights or high-altitude cross-countries sometimes forget these increased requirements. The speed limit also changes — 250 knots below 10,000 MSL does not apply above it.
Frequently Asked Questions
What are the 6 classes of airspace in the US?
The FAA classifies US airspace into six categories: Class A (above FL180, IFR only), Class B (major airports like LAX, JFK, ORD), Class C (medium airports with approach control), Class D (towered airports), Class E (controlled airspace that is not A, B, C, or D), and Class G (uncontrolled airspace). Classes A through E are controlled airspace, while Class G is uncontrolled.
What is the difference between controlled and uncontrolled airspace?
Controlled airspace (Classes A, B, C, D, and E) is airspace where ATC provides separation services and communication or clearance may be required. Uncontrolled airspace (Class G) has no ATC services or requirements — pilots are entirely responsible for their own separation from other aircraft and terrain. Most Class G airspace exists from the surface up to 700 or 1,200 feet AGL.
Do I need a clearance to enter Class C airspace?
No, you do not need a clearance for Class C, but you do need to establish two-way radio communication with ATC before entering. This means the controller must acknowledge your callsign specifically — hearing 'aircraft calling, stand by' is sufficient, but just calling with no response is not. You also need a transponder with Mode C (altitude reporting) and ADS-B Out.
What is the Mode C veil?
The Mode C veil is a 30 nautical mile ring around the primary airport of each Class B airspace. Within this area, from the surface up to 10,000 feet MSL, all aircraft must have an operating transponder with Mode C (altitude reporting) and ADS-B Out equipment, even if they are not entering the Class B airspace itself. This requirement exists for collision avoidance around the busiest airports.
Can student pilots fly in Class B airspace?
Student pilots can fly in some Class B airspace, but there are restrictions. FAR 61.95 requires that student pilots receive specific ground and flight training for the Class B airspace they want to enter and have a logbook endorsement from their instructor. Additionally, some Class B airports (listed in FAR Part 91 Appendix D) prohibit student pilot operations entirely — these include airports like LAX, JFK, ORD, ATL, and others.
What are the VFR cloud clearance requirements for Class B airspace?
Class B airspace has the least restrictive VFR cloud clearance requirements among controlled airspace: you only need to remain 'clear of clouds' with 3 statute miles of flight visibility. This is because all traffic in Class B receives ATC separation, reducing the need for pilots to use cloud clearance as a buffer against unseen traffic.
What is Special Use Airspace?
Special Use Airspace (SUA) includes areas where activities are confined because of their nature or where limitations are imposed on non-participating aircraft. Types include Prohibited Areas (no entry, e.g., P-56 over the White House), Restricted Areas (hazardous activities like artillery firing), Military Operations Areas (military training), Warning Areas (over international waters), and Alert Areas (high volume of pilot training or unusual activity).
How do I identify different airspace classes on a sectional chart?
On sectional charts: Class B appears as solid blue lines with altitude labels. Class C uses solid magenta circles with altitude shelves. Class D is shown as a dashed blue line. Class E starting at the surface uses a dashed magenta line. Class E starting at 700 AGL is indicated by a magenta-tinted (shaded) area. The absence of any shading indicates Class E starts at 1,200 AGL with Class G below. Class A is not depicted on sectional charts since it uniformly starts at FL180.
Related Resources
Master Airspace and Pass Your Written Exam
Airspace is one of the most heavily tested subjects on every FAA knowledge test. Rotate gives you hundreds of practice questions with detailed explanations so you can walk into the testing center with confidence.
PPL, IFR, CPL, ATP, Part 107 · 1,000+ questions · $7.49/mo with 50% off
50% off first month with code PILOT50. Cancel anytime.