Class B airspace
E49550
Class B airspace is a highly controlled airspace surrounding the nation’s busiest airports, designed to manage dense traffic with strict entry and communication requirements for pilots.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Class B airspace canonical | 5 |
| Class B airspace around Washington, D.C. | 1 |
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
United States airspace class
ⓘ
controlled airspace classification ⓘ |
| allows |
IFR operations
ⓘ
VFR operations with ATC clearance ⓘ |
| associatedWith |
Class B primary airport control tower
ⓘ
radar approach control facility ⓘ |
| centeredOn | primary Class B airport ⓘ |
| chartedOn |
VFR terminal area charts
ⓘ
sectional aeronautical charts ⓘ |
| composedOf | multiple concentric shelves ⓘ |
| definedBy | Federal Aviation Administration ⓘ |
| designedFor |
high‑performance aircraft
ⓘ
large air carrier operations ⓘ |
| existsIn |
National Airspace System
ⓘ
surface form:
National Airspace System of the United States
|
| governedBy |
Title 14 of the Code of Federal Regulations
ⓘ
surface form:
Title 14 CFR Part 71
Federal Aviation Regulations ⓘ
surface form:
Title 14 CFR Part 91
|
| hasAbbreviation | Class B ⓘ |
| hasCeiling | varies by airport ⓘ |
| hasEntryRequirement | aircraft must be equipped for IFR or VFR with required radios and transponder ⓘ |
| hasLowerFloor | varies by sector ⓘ |
| hasMinimumWeatherRequirements |
3 statute miles visibility
ⓘ
clear of clouds ⓘ |
| hasNoiseConsiderations | often subject to noise abatement procedures ⓘ |
| hasPrimaryPurpose | management of high‑density air traffic ⓘ |
| hasShape | upside‑down wedding cake ⓘ |
| hasSpecialVFRRules | Special VFR operations require at least instrument rating for pilots at some Class B airports ⓘ |
| hasSpeedLimit |
200 knots indicated airspeed in underlying VFR corridors or within 4 NM of primary airport at or below 2,500 feet AGL
ⓘ
250 knots indicated airspeed below 10,000 feet MSL ⓘ |
| hasTypicalLowerLimit | surface at primary airport ⓘ |
| hasTypicalUpperLimit | 10,000 feet MSL ⓘ |
| hasVerticalLimit | surface to typically 10,000 feet MSL ⓘ |
| isLessRestrictiveThan | Class A airspace ⓘ |
| isMoreRestrictiveThan |
Class C airspace
ⓘ
Class D airspace ⓘ |
| protects | arrival and departure corridors ⓘ |
| provides |
sequencing for all aircraft to primary airport
ⓘ
traffic separation between IFR and VFR aircraft ⓘ |
| relatedTo | ICAO Class C and D concepts but defined differently in the U.S. system ⓘ |
| requires |
ATC clearance prior to entry
ⓘ
Mode C transponder ⓘ operable altitude‑encoding equipment ⓘ pilot to receive explicit ATC authorization ⓘ student pilot endorsement for solo operations ⓘ two‑way radio communication with ATC ⓘ |
| requiresForEntry | pilot to establish two‑way communication using correct facility call sign ⓘ |
| requiresForVFR | ATC separation services from other aircraft ⓘ |
| subjectTo | local letters of agreement and facility directives ⓘ |
| surrounds | nation’s busiest airports ⓘ |
| uses | solid blue lines on charts ⓘ |
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Class B airspace around Washington, D.C.