Definition
The reference panel printed on an aeronautical chart that explains the meaning of every symbol, color, line style, and abbreviation used on that chart. It tells the pilot how to interpret what they are seeing on the map, including airport types, airspace boundaries, terrain elevations, navigation aids, obstructions, and special-use areas.
Plain English
The key on the chart that tells you what each symbol, color, and marking actually means.
Context Anchor
Pilots use the aeronautical chart legend when reading FAA charts, especially when a symbol or marking on the chart is not immediately familiar.
Derivation
The word legend comes from the Latin legenda, meaning 'things to be read.' On a chart, the legend is literally the part you read first so the rest of the chart makes sense.
Why Pilots Care
Correctly reading the legend prevents misinterpretation of chart symbols that could lead to navigation errors or airspace violations.
Analogy
It works like the key on a road map: the map shows the marks, and the legend tells you what those marks mean.
Intuition Check
Do not read legend here as a story or myth. On an aeronautical chart, a legend is the key that explains the chart’s symbols and markings.
Example Sentence 1
Before the cross-country flight, the student checked the aeronautical chart legend to confirm what the small magenta circle next to the airport meant.
Example Sentence 2
Before departure the student reviewed the aeronautical chart legend to understand the meaning of the magenta shading around the airport.