Definition
A short alphanumeric identifier assigned to a published instrument procedure (such as a SID, STAR, or ODP) so that air traffic control computers and flight planning systems can recognize and process the procedure. The code is shown on the chart alongside the procedure name and is used in flight plan filing and ATC system handling.
Plain English
A short ID code printed on a procedure chart that ATC computers use to recognize the procedure when it's filed in a flight plan.
Context Anchor
Seen when discussing published departure procedures and how they may be loaded or shown in cockpit navigation equipment.
Derivation
Computer comes from compute, meaning to calculate. Code means a system of symbols or instructions that carries information. Together, computer code means information written in a form a computer can process, which fits the aviation use here: procedure information made readable by aircraft equipment.
Why Pilots Care
Selecting the correct computer code loads the precise obstacle-protected routing, ensuring terrain clearance and compliance with the published procedure.
Intuition Check
Computer code does not mean a secret password here. It means procedure information formatted so aircraft equipment can use it.
Example Sentence 1
He copied the computer code from the ODP chart into the route section of his IFR flight plan.
Example Sentence 2
Confirm the computer code on the chart matches the one entered before takeoff.