...
The RouteAvailability class is used to define the direction of the RouteSegment. AIXM provides the possibility to encode if a route segment may be available for just one direction, i.e. 'FORWARD', or 'BACKWARD', or 'BOTH' directiondirections.
The value 'OTHER' should not be used. Also 'BOTH' should be avoided as for the different direction a different level series will apply. In case a of a bidirectional route, two records have to shall be encoded - one for forward and one for backward.
The StandardLevelColumn class is used to define the series of levels. In general, the value used will either be 'ODD' or 'EVEN'. 'ODD_HALF' and 'EVEN_HALF' are used for intermediate flight levels, above odd levels (15, 35, 55, 75, ...) or above even levels (5, 25, 45, 65, ...).
...
Forward/Backward is equivalent to the little arrow that appears in the ENR 3.x tables in the AIP, to indicate the direction of flight which is concerned by odd/even.
In addtion addition, the AirspaceLayer class may be used to encode limitations on the vertical levels. In case the AirspaceLayer class is used to encode vertical limits, they have to shall correspond with the values specified in the StandardLevelColumn.
...
| Identifier | Data Encoding Rule | Justification | Data Verification Rule (UID) | Remarks |
|---|---|---|---|---|
| RSG-301 | Each Route.Segement shall have as minimum one and as maximum two related RouteAvailability.direction. | PANS-AIM minimum data | TBD | |
| RSG-302 | For each RouteAvailability a StandardLevelColumn.series shall be provided. | PANS-AIM minimum data | TBD | |
| RSG-303 | For RouteAvailability.direction the values 'BOTH' and 'OTHER' shall not be used. | Data consistancyconsistency | TBD | In case a of a bidirectional route, two records have to shall be encoded - one for forward and one for backward. |
...