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Visual Docking Guidance System (VDGS)

Abbreviations, Airport, Gate, Terminology

A Visual Docking Guidance System (VDGS) is a stand guidance system that usually consists of an Azimuth Guidance for Nose-in Stands (AGNIS) along with Parallax Aircraft Parking Aid (PAPA).

The light bars on the AGNIS display one of the following signals:

  • There are two bars
  • If both are green, they indicate correct alignment
  • If one is red, they need to steer away from the side that has turned green

Moiré Pattern

Note: This page has very little or no relation to aviation, but was created for the purpose of understanding a different topic better. The Moiré effect was an effect previously used in beacons along shorelines to indicate...

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Altimeter (ALT)

The altimeter is a flight instrument used to tell the altitude of an aircraft. The term, altimeter, can be used to describe both the analog and digital versions. The digital versions of an altimeter can usually be found on the...

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