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  2. Mode C veil - Wikipedia

    en.wikipedia.org/wiki/Mode_C_veil

    Mode C veil refers to a kind of airspace which currently surrounds all primary Class B airports within the United States. This airspace extends horizontally to a circle of 30 NM radius centered on the airport, and extends vertically from the surface up to 10,000 feet MSL . [ 1 ]

  3. List of Class C airports in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_Class_C_airports...

    Class C is a class of airspace in the United States which follows International Civil Aviation Organization (ICAO) air space designation. Class C airspace areas are designed to improve aviation safety by reducing the risk of mid-air collisions in the terminal area and enhance the management of air traffic operations therein. [1]

  4. Airspace class - Wikipedia

    en.wikipedia.org/wiki/Airspace_class

    The 30 NM Mode C Veil is denoted on VFR charts by a thin magenta line. VFR traffic must remain clear of clouds and maintain 3 SM of visibility while operating within Class B airspace. Class C airspace is used around airports with a moderate traffic level. Class D is used for smaller airports that have a control tower. The U.S. uses a modified ...

  5. Airspace class (United States) - Wikipedia

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

    The United States airspace system's classification scheme is intended to maximize pilot flexibility within acceptable levels of risk appropriate to the type of operation and traffic density within that class of airspace – in particular to provide separation and active control in areas of dense or high-speed flight operations.

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

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

    The airspace is commonly depicted as resembling an "upside-down wedding cake". The innermost ring extends from the surface area around the airport to typically 10,000' MSL . 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.

  7. After COVID, WHO defines disease spread 'through air' - AOL

    www.aol.com/news/covid-defines-disease-spread...

    The World Health Organization and around 500 experts have agreed for the first time what it means for a disease to spread through the air, in a bid to avoid the confusion early in the COVID-19 ...

  8. List of aviation, avionics, aerospace and aeronautical ...

    en.wikipedia.org/wiki/List_of_aviation,_avionics...

    Mode A Transponder pulse-code reporting Mode B Transponder code and altitude reporting Mode C Transponder code, altitude, and TCAS reporting MOE maintenance organisation exposition MOPS Minimum Operational Performance Standard MORA Minimum Off Route Altitude MOSArt Modular Open System Architecture MP manifold pressure: MPL multi-crew pilot ...

  9. Health geography - Wikipedia

    en.wikipedia.org/wiki/Health_geography

    Health geography is the application of geographical information, perspectives, and methods to the study of health, disease, and health care. Medical geography , a sub-discipline of, or sister field of health geography, [ 1 ] focuses on understanding spatial patterns of health and disease in relation to the natural and social environment.