Definition
Standardized data entries used to encode navigation information — such as airports, runways, navaids, waypoints, airways, and instrument procedures — in a common format that avionics manufacturers and database providers use to load navigation databases into FMS, GPS, and flight management computers. ARINC 424 is the industry specification that defines the structure, fields, and rules for these records.
Plain English
These are the lines of coded data that tell your navigation system about every airport, fix, route, and approach in the world. They are written in a fixed format so that any avionics box can read them the same way.
Context Anchor
Seen when studying how instrument procedures are converted from charted procedures into the electronic navigation data used by aircraft systems.
Derivation
ARINC stands for Aeronautical Radio, Incorporated — the company that originally developed and published this data standard. The number 424 is simply the specification number assigned to this particular standard within ARINC's catalog of aviation specifications.
Why Pilots Care
They provide the consistent, machine-readable source data that FMS units rely on to fly RNAV and RNP procedures accurately and safely.
Intuition Check
Do not read “records” here as voice recordings or written notes. Here, records means structured data entries inside an aviation navigation database.
Example Sentence 1
Each instrument approach in the GPS database is built from a series of ARINC 424 records that define the fixes, courses, and altitudes.
Example Sentence 2
During preflight, the crew compared the ARINC 424 records against the published chart to confirm no data discrepancies existed.