It is important to understand that rather then a full replacement of data, X-Plane 11 allows the data to be organized in layers with increasing priority, where higher priority data overrides the data from all layers below. Full file format specifications are available below.
These look superficially similar to the data files of previous versions, but they are fundamentally different in that referential integrity is required, and globally uniqueness with respect to type, code, and region code is enforced at load time. If no global 424 file is present, X-Plane will instead load files of the XPNAV1150/XPFIX1101/XPAWY1100/XPHOLD1140 format. In particular, X-Plane will then NOT load any of the files described in the following as “Global data”. It is assumed that when the installation is provided with a global 424 file, no data of any other format needs to be loaded.
Professional customers with access to 424 master files can use them to override the X-Plane global database. ARINC 424 supplements 18 up to 20, with the exceptions noted in the FAA/Aeronautical Information Services CIFP Readme.
X-Plane 11 supports two formats in which the global database can be provided: X-Plane enforces integrity of this unique index, because it is needed to build the graph of the airway network. Only then it is possible to build the layered structure. See ICAO document No 7910 for details.īy classification into terminal vs global items, and assigning the correct parent terminal area or ICAO region, each item in the database is addressable by a globally unique identifier. Note especially the seven regions defined for the continental United States. All fixes and navaids must specify the region ICAO code according to the 424.20 5.14 ICAO code. Terminal fixes and navaids must specify the arpt/heli ident of their terminal area, according to the 424.20 5.6 Airport/Heliport Identifier.
X-Plane 11 distinguishes between global and terminal fixes and navaids. If you find an airport with these values missing or incorrect, use WED 1.5 or later to add/edit these values and upload your change to the scenery gateway. Note that this data is already populated for most airports in the scenery gateway.