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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 (any two-digit value with one decimal is allowed!). RNAV values are not considered.

Status: for AIXM 5.2 see CCB AIXM-135

Workaround for AIXM5.1.1, until the open PBN issue are clarified within the AIXM CCB, the following coding is proposed:

• Use the value 'OTHER' for the

• attribute RouteSegment.navigationType

•  e.g. 'OTHER:RNAV_5' or 'OTHER RNP_4', according to the values defined in ICAO Doc 9613 (PBN Manual).
• for the attribute requiredNavigationPerformance provide the actual

• RNP or RNAV

• value, according to the values defined in ICAO Doc 9613 (PBN Manual)

• .