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Image RemovedFor Route Segment, PANS-AIM requires as part of th eminimum data set information about the navigation specification and required navigation performance.

Note
titleNote
There are several open questions/issues about the encoding of this information, regarding both PANS-AIM and AIXM 5. Thus, this page is not to be seen as coding guidelines but rather as discussion of the issues detected.

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The following table shows the Application of navigation specification by flight phase:

The diagram below shows the AIXM 5.1.1 classes, including the relevant data types, that may be used to encode that information:

Image Added

Warning
titleAIXM 5.1.1 issue

AIXM 5.1.1 provides two attributes regarding navigation specifications for a RouteSegment. Both seem to be insufficient to code the designation of the PBN specification.

  • navigationType is basically used to encode if the route is 'CONV 'or 'RNAV', but is not intended to code the PBN specification. Although, 'OTHER' could be used to define PBN Navigation Specifications, e.g. 'RNAV 5' or 'RNP 4'.
  • requiredNavigationPerformance is intended to code RNP values. RNAV values are not considered.

Another option would be to code a FlightRestriction for a RoutePortion. A related FlightConditionElement may be encoded with a corresponding AircraftCharacteristic.navigationSpecification. The code list for this attribute CodeNaviagationSpecificationType contains all required values.

However, it is not clear if the actual intention of the FlightRestriction model of AIXM is to encode that kind of information.

The AIXM definition for FlightRestriction is:

A rule meant to regulate the use of the route network, by identifying a set of flights which fulfil a combination of elementary flow conditions and either forbidding them on a particular routing or obliging them to follow one routing out of a set of mandatory alternatives.