National Museum of American History

This compass–with six needles, and a flat card with central buoyancy–was Ritchie’s most successful design and was widely used by American merchant ships and the U.S. Navy. The Ritchie ledgers, now held by Ritchie Navigation, indicate that this example was manufactured on Jan.

Take a 360 VR tour inside the National Museum of African American

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National Museum of American History Blog

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Smithsonian National Museum of American History

National Museum of American History

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