Intersection (aeronautics)

As Intersection ( German: intersection ) is called in aviation, a defined map point, which allows the pilot observed its flight schedule in navigation.

Definition

The Intersections are virtual navigation fixed points for instrument flight, which can be defined in several ways:

  • Usually as an Intersection ( in the geometric sense ) of two intersecting VOR radials (see forward section)
  • Or rarer than a VOR radial and distance to the VOR ( Very High Frequency Omnidirectional Radio Range)

The pilot can not arbitrarily determine its own navigation fixed points, but only use the values ​​defined in the aeronautical charts Intersections during instrument flight.

Representation

The intersections are shown on aeronautical charts with a small triangle icon. Intersections have no real names, but are identified by 5 letters or numbers. This distinguishes them clearly from the VOR name, referred to in addition to the real names with three letters.

Names and pronunciation

The five letters are often chosen on the basis of geographical name of the environment. Despite the restriction to 5 letters of these names often sound very local. Depending on whether they are located in Hungary, France, Japan and Russia. For example:

  • Basum - located above the city Bassum

Even fantasy names and the letters of the ICAO alphabet are used. However, always the restriction is adhered to on 5 letters or numbers. In radio, the pilot speaks the Intersection names if possible as a coherent word (example: " Basum "). If his pronunciation in foreign countries hard, then he can the letters individually using the ICAO alphabet by type (example: "Intersection Bravo - Alpha -Sierra - Uniform - Mike" ).

Departure / approach

Intersections play an important role in the Departure Procedures (SIDs ) and the approach procedures ( STARs ). RNAV Intersections, which are used in the arrival or departure procedures at airports are usually named with the last two letters of the ICAO code of the respective airfield and a 3- digit number. For example DL455 is a waypoint in the approach to the airport Dusseldorf (EDDL ). This syntax is only applied if the waypoint is not specified on Radial, but only on its coordinates.

  • Air navigation
Flight plan VHF omnidirectional range Area Control Center#Center operations Standard instrument departure (SID) Standard Terminal Arrival Route International Civil Aviation Organization airport code
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