File Format Specifications

File Formats

TitleDateDescription
Navdata in X-Plane 112016-10-09 13:03:18This document explains the new Nav data format for X-Plane 11.
Airport Data (apt.dat) 11.00 File Format Specification2015-11-18 13:15:02This document defines core airport data for current version of X-Plane (11.00 and onwards).
Astronomical data (astro.dat) File Format Specification2015-11-12 11:04:21This document describes the file format and codes used in X-Plane's astro.dat file, usable with X-Plane version 7.40 onwards.

Old File Formats

TitleDateDescription
Airport Data (apt.dat) 1050 File Format Specification2017-02-07 17:24:23This defines the legacy apt.dat format for X-Plane version 10.50-10.52.
Airport Data (apt.dat) 850 Version2017-01-18 13:47:14This defines the legacy apt.dat format for X-Plane version 8.50.
Airport Data (apt.dat) 10.00 Version2017-01-18 13:29:37This document defines core airport data for X-Plane 10.00.
Airport data (apt.dat) 715 version2015-11-19 15:40:25This defines the legacy apt.dat format for X-Plane version 7.15 – 8.06.
X-Plane nav-aid data file definition (740 version)2015-11-19 15:30:01This explains the legacy nav.dat file format for X-Plane version 7.40 – 8.09.
Navigation Data (nav.dat & earth_nav.dat) File Format Specification2015-11-12 13:43:14This explains the legacy nav.dat file format for X-Plane version 8.10 – 10.52.
Fix Intersection (fix.dat) File Format Specification2015-11-12 13:37:02This explains the legacy earth_fix.dat file format for X-Plane version 7.40 – 10.52.
Airway Data (awy.dat) File Format Specification2015-11-12 13:16:32This explains the legacy earth_awy.dat file format for X-Plane version 7.40 – 10.52.