Resource Library

ENCYCLOPEDIC ENTRY
ENCYCLOPEDIC ENTRY

chart

chart

Charts help captains of ships and pilots of airplanes navigate to their destination quickly and safely

Grades

3 - 12+

Subjects

Geographic Information Systems (GIS), Geography, Human Geography, Social Studies, World History

Powered by
Morgan Stanley

Charts help captains of ships and pilots of airplanes navigate to their destination quickly and safely. They are like maps, but for the sea and air. There are two kinds of charts: nautical charts and aeronautical charts.

Nautical charts feature information about the sea, such as depth and behavior of the water in particular areas. Nautical charts detail where swells, tides, and ocean gyres develop. Nautical charts also represent features of the sea floor, such as canyons and reefs. They may contain the locations of man-made features such as buoys, lighthouses, and harbors. Sea captains use this information to plan their routes. They also use the charts to determine the location of their ship.

Aeronautical charts show features of the land such as mountain ranges, bodies of water, tall buildings, airports, and safe landing areas for pilots. They also show the distance between certain points and the official airspace of different countries. Aeronautical charts typically display different radio frequencies for the areas they depict, so pilots can call for assistance in an emergency or bad weather. These charts help pilots navigate their airplanes and determine a safe flying altitude.

Both types of charts include information about the Earths magnetic field. This is important because equipment can experience irregularities as vessels approach the magnetic north pole or the magnetic south pole.

Most charts are printed on large sheets of paper and come in different scales. Some charts depict a very small area, such as the coastline around a harbor. Others depict an entire ocean or continent. There are also electronic charts, created using a geographic information system (GIS). GIS charts are stored on computers.

Fast Fact

Chart Error
Nautical charts that Christopher Columbus used when he set off from Spain showed nothing but ocean between him and eastern China. That's why his discovery of the Americas was such a lucky, lucky surprise.

Media Credits

The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. The Rights Holder for media is the person or group credited.

Writers
Kim Rutledge
Melissa McDaniel
Santani Teng
Hilary Hall
Tara Ramroop
Erin Sprout
Jeff Hunt
Diane Boudreau
Hilary Costa
Illustrators
Mary Crooks, National Geographic Society
Tim Gunther
Editors
Jeannie Evers, Emdash Editing, Emdash Editing
Kara West
Educator Reviewer
Nancy Wynne
Producer
National Geographic Society
other
Last Updated

May 13, 2022

For information on user permissions, please read our Terms of Service. If you have questions about licensing content on this page, please contact ngimagecollection@natgeo.com for more information and to obtain a license. If you have questions about how to cite anything on our website in your project or classroom presentation, please contact your teacher. She or he will best know the preferred format. When you reach out to him or her, you will need the page title, URL, and the date you accessed the resource.

Media

If a media asset is downloadable, a download button appears in the corner of the media viewer. If no button appears, you cannot download or save the media.

Text

Text on this page is printable and can be used according to our Terms of Service.

Interactives

Any interactives on this page can only be played while you are visiting our website. You cannot download interactives.