Definition
Aeronautical charts designed for use under Instrument Flight Rules, depicting airways, navigation aids, intersections, minimum altitudes, controlled airspace boundaries, and instrument procedures rather than visual ground references. The two main types are Enroute Low/High Altitude charts and Terminal Procedure Publications (approach, departure, and arrival charts).
Plain English
Maps pilots use when they are flying by instruments and following ATC routings instead of looking out the window for landmarks. They show the radio-based highways in the sky, the altitudes you must fly, and the procedures for arriving and departing at airports.
Context Anchor
You will see IFR charts during instrument training, flight planning, and any flight that may be flown under instrument flight rules.
Derivation
IFR stands for Instrument Flight Rules. 'Chart' comes from the Latin 'charta', meaning a sheet of paper or map. So an IFR chart is literally a map made for flying by instruments.
Why Pilots Care
They supply the precise routes, altitudes, and procedures needed to navigate safely when visual references are unavailable.
Intuition Check
IFR charts are not just weather pictures or general maps. They are official flying references for instrument routes, safe altitudes, and procedures.
Example Sentence 1
Before the cross-country flight, the instructor reviewed the IFR charts with the student to identify the airways, minimum enroute altitudes, and the approach procedure at the destination.
Example Sentence 2
In the cockpit the crew cross-checked the approach plate from the IFR charts as they descended through the clouds.