Mileage breakdown on IFR charts refers to?

• A. A fix indicating a course change that appears as an "x" at a break between segments of a federal airway
• B. A measurement of distance to the destination
• C. A symbol marking a VOR
• D. A scale bar on the chart

Answer: (A)

Mileage breakdown shows how far you must fly between fixes when an airway is divided into separate segments. On IFR enroute charts, the distance between fixes is given for each segment, and at the junction where those segments meet you’ll see an X marking a mileage break. That symbol signals that the leg distances are read per segment rather than as one continuous distance, which is important for accurately timing and planning fuel for each portion of the flight. It isn’t about a course change, a VOR symbol, or a chart scale; it’s about identifying where the distance is split across airway segments.