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  2. Uncontrolled airspace - Wikipedia

    en.wikipedia.org/wiki/Uncontrolled_airspace

    In aviation, uncontrolled airspace is airspace in which an Air Traffic Control (ATC) service is not deemed necessary or cannot be provided for practical reasons. It is the opposite of controlled airspace. It is that portion of the airspace that has not been designated as Control Area, Control Zone, Terminal Control Area or Transition Area. [1]

  3. Separation (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Separation_(aeronautics)

    Separation can also apply to terrain, obstacles, and controlled airspace, wherein an aircraft must stay at a minimum distance from a block of airspace; as an example, all aircraft must be approved by the controller who "owns" the airspace before the aircraft is approved to enter that sector. Separation at cruising altitude (aircraft passing below).

  4. Visual meteorological conditions - Wikipedia

    en.wikipedia.org/wiki/Visual_meteorological...

    In uncontrolled airspace there is less risk of a VFR aircraft colliding with an instrument flight rules (IFR) aircraft emerging from a cloud, so aircraft are permitted to fly closer to clouds. An exception to this rule is class B airspace, in which ATC separates VFR traffic from all other traffic (VFR or IFR), which is why in class B airspace ...

  5. National Airspace System - Wikipedia

    en.wikipedia.org/wiki/National_Airspace_System

    Class G airspace is uncontrolled airspace which extends from the surface to either 700 or 1,200 ft. AGL depending on the floor of the overlying Class E, or to the floor of Class A where there is no overlying Class E. In the vicinity of an uncontrolled airport, the CTAF for that airport is used for radio communication among pilots.

  6. Scud running - Wikipedia

    en.wikipedia.org/wiki/Scud_running

    However, outside of airport control zones and major terminal areas, controlled airspace typically begins at 1,200 feet (370 m) above ground level; below that is uncontrolled (class G) airspace, where (at that altitude) a pilot is required only to remain clear of clouds and to maintain 1 statute mile (1.6 km) visibility.

  7. Airspace class - Wikipedia

    en.wikipedia.org/wiki/Airspace_class

    The world's navigable airspace is divided into three-dimensional segments, each of which is assigned to a specific class. Most nations adhere to the classification specified by the International Civil Aviation Organization (ICAO) and described below, though they might use only some of the classes defined below, and significantly alter the exact rules and requirements.

  8. Does Uncle Sam Consider Your Backyard Restricted Airspace? - AOL

    www.aol.com/news/does-uncle-sam-consider...

    The areas where you need FAA approval to fly a model plane or drone are surprisingly large.

  9. Glossary of aerospace engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_aerospace...

    Albedo – is the measure of the diffuse reflection of solar radiation out of the total solar radiation received by an astronomical body (e.g. a planet like Earth). It is dimensionless and measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects all incident ...