Category: Flight Simulator X - Miscellaneous Files
AIRNAV Navdata Data File Definition

File Description:
A definition of the navdata data files including wpNavAID.txt, wpNavAPT.txt, wpNavRTE.txt and wpNavFIX used by all PMDG FMS-equipped aircraft. Although this file is currently available from Navigraph, the format of this file predates their service and is not proprietary information. Understanding the layout of these files will make it easier to add custom airports.