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Compass | History, Uses & Types | Britannica
Online Compass | Shows direction relative to the geographic …
How do I use a compass in Google Earth? - Geographic Pedia
Compass - Wikipedia
History of the compass - Wikipedia
Compass - National Geographic Society
Magnetic compass | Invention, History, & Facts | Britannica
How does a compass work? - Live Science
How does a magnetic compass work? - Explain that Stuff
How Does a Compass Work? - Wonderopolis