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Making America's Best Idea Even Better
National Park ServiceSome officers of the St. Joseph Society, a Polish organization in Salem founded in 1894. NPS collections.
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The octant is a navigational tool based on the curve of one eighth of a circle. It measures angles for solar and celestial navigation.  

Did You Know?
In 1799, Salem native Nathaniel Bowditch revised John H. Moore's New Practical Navigator, the standard navigation manual of the 18th century. Bowditch discovered and corrected over 8,000 errors in Moore's manual! In 1802, Bowditch published the New American Practical Navigator.

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Last Updated: July 25, 2006 at 00:31 EST