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  2. Airspace class (United States) - Wikipedia

    en.wikipedia.org/wiki/Airspace_class_(United_States)

    The airspace class designation is in effect only during the hours of tower and approach operation at the primary airport; the airspace reverts to Class D if approach control is not operating, and to class E or G if the tower is closed. The vertical boundary is usually 4,000 feet (1,200 m) above the airport surface. The core surface area has a ...

  3. National Airspace System - Wikipedia

    en.wikipedia.org/wiki/National_Airspace_System

    Between the sectors administered by TRACONs are 20 contiguous areas of US airspace above 18,000 feet, each managed by an Air Route Traffic Control Center (ARTCC) typically referred to on the radio as "Center". A flight is handed off from one Center to another until it descends near its destination, when control is transferred to the TRACON ...

  4. List of U.S. Air Route Traffic Control Centers - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._Air_Route...

    An ARTCC controls aircraft flying in a specified region of airspace, known as a flight information region (FIR), typically during the en route portion of flight. The purpose of control is to promote the safe, orderly, and expeditious flow of air traffic [ 2 ] and prevent collisions.

  5. List of area control centers - Wikipedia

    en.wikipedia.org/wiki/List_of_area_control_centers

    Area control centers (ACCs) control IFR air traffic in their flight information region (FIR).. The current list of FIRs and ACCs is maintained by the International Civil Aviation Organization (ICAO). [1]

  6. List of Class B airports in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_Class_B_airports...

    Several outer rings usually surround it with progressively higher floors to allow traffic into nearby airports without entering the primary airport's 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 ...

  7. Terminal radar service area - Wikipedia

    en.wikipedia.org/wiki/Terminal_radar_service_area

    Terminal Radar Service Area was established as part of a program to create terminal radar stations at selected airports. Because they were not subject to the rulemaking process of 14 CFR Part 91, they do not fit into any existing U.S. classifications of airspace, and have been classified as non-part 71 airspaces.

  8. Key US Air Force base closes airspace amid drone sightings - AOL

    www.aol.com/key-us-air-force-closes-070045875.html

    The 88th Air Base Wing headquarters is located in Building 10 on Area A, Wright-Patterson Air Force Base, Ohio, on May 17, 2022. (Matthew Clouse/U.S. Air Force)

  9. Airspace - Wikipedia

    en.wikipedia.org/wiki/Airspace

    Class A airspace is generally the airspace from 18,000 feet (~3.4 miles, 5.5 km) mean sea level (MSL) up to and including flight level (FL) 600 (~11.4 miles, 18.3 km), including the airspace overlying the waters within 12 nautical miles (NM) (~13.8 miles, 22.2 km) of the coast of the 48 contiguous states and Alaska. Unless otherwise authorized ...

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