Definition
A small-scale aeronautical chart published at a scale of 1:1,000,000, designed to provide aeronautical and topographical information for navigation by pilots of moderate-speed aircraft over medium and long distances. WAC charts cover land areas at a less detailed scale than Sectional Charts (1:500,000), showing terrain relief, larger airports, radio aids, restricted areas, and major cultural features.
Plain English
A large-area aviation map that covers more ground than a Sectional Chart but shows less fine detail. It is useful for longer cross-country flights where the pilot needs the bigger picture rather than close-in airport detail.
Context Anchor
Seen in chart selection, flight planning, and FAA acronym lists when discussing aviation maps used for navigation.
Derivation
‘Aeronautical’ comes from the Greek roots for ‘air’ and ‘sailor’ — literally ‘navigating the air.’ ‘World’ reflects that these charts were originally part of an international series intended to provide consistent global aviation coverage.
Why Pilots Care
Provides an overview of terrain and navigation features that supports safe route selection on longer visual flights.
Intuition Check
Do not read chart here as a graph or table. In this context, a chart is an aviation map. World does not mean every detail of the whole world on one page; it means the chart series is designed for broad-area coverage.
Example Sentence 1
For the long leg across the desert, the pilot used a World Aeronautical Chart instead of carrying several Sectionals.
Example Sentence 2
WACs cover larger areas than sectional charts and are useful when planning flights that span multiple states.