Definition
A set of industry specifications, published by Aeronautical Radio, Inc. (ARINC), that define how flight procedure data — including waypoints, courses, altitudes, and the path-and-terminator legs that make up departures, arrivals, and approaches — must be encoded into the navigation databases used by aircraft flight management systems. The most relevant document is ARINC Specification 424, which standardizes the format so that any compliant FMS can read and fly the same coded procedure consistently.
Plain English
A common rulebook that tells navigation database makers how to write each piece of a flight procedure into the FMS, so every flight management system reads it the same way and flies it the same way.
Context Anchor
Seen when studying how instrument procedures are stored in navigation databases and displayed by cockpit navigation equipment.
Derivation
ARINC stands for Aeronautical Radio, Inc., a company founded in 1929 to manage shared aviation radio and data standards for U.S. airlines. Over time it became the body that publishes technical specifications the industry agrees to use. 'Coding standards' simply means the agreed rules for how information is written down in a database.
Why Pilots Care
They guarantee that published procedures are flown identically by different aircraft systems, reducing the chance of path errors.
Analogy
Think of the chart as the printed directions and the ARINC coding standards as the agreed format for entering those directions into a navigation device. The format helps different devices read the same instructions in the same basic way.
Intuition Check
Do not read “coding standards” as general computer-programming style rules. Here it means specific aviation database rules for turning published procedure instructions into electronic navigation data.
Example Sentence 1
The published approach uses several path-and-terminator legs, all encoded in the FMS according to ARINC coding standards.
Example Sentence 2
ARINC coding standards define each leg of the departure so the system knows exactly where to turn and climb.