Definition
A map used in air navigation that depicts topographic features, airspace boundaries, airports, navigation aids, obstructions, and other information essential to flight. Aeronautical charts are produced in different types and scales for different phases and methods of flight, including Sectional Charts and VFR Terminal Area Charts for visual navigation, World Aeronautical Charts for longer-range visual flying, and IFR En Route Low and High Altitude Charts for instrument navigation along airways.
Plain English
A specialized map made for pilots. It shows the things you need in the air -- airports, airspace, radio aids, terrain, and tall obstacles -- rather than the things on a road map.
Context Anchor
Pilots use aeronautical charts during flight planning, before takeoff, and in the cockpit to follow a route and stay aware of nearby airports, terrain, and airspace.
Derivation
From the Greek 'aer' (air) plus 'nautikos' (relating to ships or sailing), giving 'aeronautical' -- literally 'sailing through the air.' A chart, in the maritime sense, has always meant a map made for navigation. So an aeronautical chart is simply a navigation map for the air.
Why Pilots Care
These charts let pilots plan safe routes, spot hazards like tall towers or mountains, and stay clear of restricted airspace.
Intuition Check
Do not think of an aeronautical chart as just a road map with airports on it. In aviation, it is a standardized flight document that contains specific information pilots need to navigate and make safe decisions.
Example Sentence 1
Before the cross-country flight, she spread the aeronautical chart on the table and traced her route around the Class B airspace.
Example Sentence 2
During the lesson the instructor used the aeronautical chart to point out nearby airports and their runway layouts.