precision approach path indicator

A system of lights arranged to provide visual descent guidance information during the approach to a runway. The system is similar to the VASI (visual approach slope indicator). However, the light units are installed in a single row of either two or four light units on the left side of the runway. These systems have an effective visual range of about 5 miles during the day and up to 20 miles at night. The glide-path indications are as depicted in the illustration.

Aviation dictionary. 2014.

Look at other dictionaries:

  • Precision Approach Path Indicator — Das VASI (Visual Approach Slope Indicator) ist ein optisches System, welches die Piloten bei der Einhaltung des Gleitpfades im Anflug auf eine Landebahn unterstützt. Ein VASI ist für Flughäfen nicht zwingend vorgeschrieben. Das System zeichnet… …   Deutsch Wikipedia

  • Precision Approach Path Indicator — The Precision Approach Path Indicator (PAPI) is a light system positioned beside the runway that consists of two, three, or four boxes of lights that provide a visual indication of an aircraft s (fixed wing or rotor wing) position on the… …   Wikipedia

  • Precision Approach Path Indicator — Le PAPI (Precision Approach Path Indicator, ou indicateur de pente d approche) est un instrument aidant à effectuer une approche correcte (dans le plan vertical) sur un aérodrome ou un aéroport. Il est généralement situé sur le côté de la piste,… …   Wikipédia en Français

  • abbreviated precision approach path indicator — A precision approach path indicator system consisting of only two light units situated on the left side of the runway. The aircraft is on a slope if the unit nearest the runway shows red and the unit farthest from the runway shows white, too high …   Aviation dictionary

  • Visual Approach Slope Indicator — Das VASI (Visual Approach Slope Indicator) ist ein optisches System, welches die Piloten bei der Einhaltung des Gleitpfades im Anflug auf eine Landebahn unterstützt. Ein VASI ist für Flughäfen nicht zwingend vorgeschrieben. Das System zeichnet… …   Deutsch Wikipedia

  • Visual Approach Slope Indicator — The Visual Approach Slope Indicator (VASI) is a system of lights on the side of an airport runway that provides visual descent guidance information during the approach to a runway. These lights may be visible from up to eight kilometers (five… …   Wikipedia

  • visual approach slope indicator — A system of lights arranged to provide visual descent guidance information during the approach to a runway. These lights are visible from 3 to 5 miles during the day and up to 20 miles at night. The visual glide path of the VASI provides a safe… …   Aviation dictionary

  • Approach lighting system — The approach lighting system of Bremen Airport An approach lighting system, or ALS, is a lighting system installed on the approach end of an airport runway and consisting of a series of lightbars, strobe lights, or a combination of the two that… …   Wikipedia

  • Instrument approach — Terminal procedures for an ILS approach in the United States. (The disclaimers shown in red in the illustration do not appear on the original approach plate.) For aircraft operating under instrument flight rules (IFR), an instrument approach or… …   Wikipedia

  • PAPI — Precision Approach Path Indicator (Governmental » Transportation) * Point Of Access To Providers Of Information (Computing » Networking) …   Abbreviations dictionary

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