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  2. Instrument approach - Wikipedia

    en.wikipedia.org/wiki/Instrument_approach

    An "approach plate" depicting an instrument approach procedure for an ILS approach to Tacoma Narrows Airport in the United StatesIn aviation, an instrument approach or instrument approach procedure (IAP) is a series of predetermined maneuvers for the orderly transfer of an aircraft operating under instrument flight rules from the beginning of the initial approach to a landing, or to a point ...

  3. Localizer type directional aid - Wikipedia

    en.wikipedia.org/wiki/Localizer_Type_Directional_Aid

    A localizer type directional aid (LDA) or Instrument Guidance System (IGS) is a type of localizer-based instrument approach to an airport. It is used in places where, due to terrain and other factors, the localizer antenna array is not aligned with the runway it serves.

  4. Instrument landing system - Wikipedia

    en.wikipedia.org/wiki/Instrument_landing_system

    ILS planes. An instrument landing system operates as a ground-based instrument approach system that provides precision lateral and vertical guidance to an aircraft approaching and landing on a runway, using a combination of radio signals and, in many cases, high-intensity lighting arrays to enable a safe landing during instrument meteorological conditions (IMC), such as low ceilings or reduced ...

  5. Instrumental variables estimation - Wikipedia

    en.wikipedia.org/wiki/Instrumental_variables...

    Informally, in attempting to estimate the causal effect of some variable X ("covariate" or "explanatory variable") on another Y ("dependent variable"), an instrument is a third variable Z which affects Y only through its effect on X. For example, suppose a researcher wishes to estimate the causal effect of smoking (X) on general health (Y). [5]

  6. Aircraft approach category - Wikipedia

    en.wikipedia.org/wiki/Aircraft_approach_category

    An aircraft approach category is a grouping which differentiates aircraft based on the speed at which the aircraft approaches a runway for landing. They are used to determine airspace, obstacle clearance and visibility requirements for instrument approaches . [ 1 ] :

  7. Approach plate - Wikipedia

    en.wikipedia.org/wiki/Approach_plate

    An approach plate for the ILS or LOC approach to runway 14L at Cologne Bonn Airport, Germany.. Approach plates (or, more formally, instrument approach procedure charts) are the printed or digital charts of instrument approach procedures that pilots use to fly instrument approaches during instrument flight rules (IFR) operations.

  8. How a little-known 18th century instrument maker may have ...

    www.aol.com/news/little-known-18th-century...

    The new paper, published January 7 in Notes and Records: The Royal Society Journal of the History of Science, sheds light on early clinical trials that pushed for a more critical, open-minded ...

  9. PANS-OPS - Wikipedia

    en.wikipedia.org/wiki/PANS-OPS

    On the internet, you can find examples of modern PANS operations, as well as the software and language used to program them: 1) FPDAM from IDS AirNav (an ENAV group company), used in more than 80 organizations, among ANSP/CAA, military agencies 2) AirNavCAD (Online software). Used in Europe, Asia, America and Australia to make PANS-OPS.