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Salem Maritime National Historic Site Nathaniel Hawthorne's stencil from his time as Surveyor of Customs
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Salem Maritime National Historic Site
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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: February 01, 2012 at 11:39 MST