Outside of WAC coverage, operational navigation charts (ONC) may be used.

World aeronautical charts (WACs) have a scale of 1:1,000,000 and cover relatively large areas.The amount of detail is necessarily reduced when larger areas are represented on a map. Visual flight charts are categorized according to their scale, which is proportional to the size of the area covered by one map. Specific charts are used for each phase of a flight and may vary from a map of a particular airport facility to an overview of the instrument routes covering an entire continent (e.g., global navigation charts), and many types in between. There are charts for all land masses on Earth, and long-distance charts for trans-oceanic travel. Using these charts and other tools, pilots are able to determine their position, safe altitude, best route to a destination, navigation aids along the way, alternative landing areas in case of an in-flight emergency, and other useful information such as radio frequencies and airspace boundaries. ( September 2018) ( Learn how and when to remove this template message)Īn aeronautical chart is a map designed to assist in navigation of aircraft, much as nautical charts do for watercraft, or a roadmap for drivers. Please help to improve this article by introducing more precise citations. This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations.

World aeronautical chart wac