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Navigate!
A free online course in basic coastal navigation.
Bowditch Online
Navigation course containing 38 chapters covering charts, radar, astronomy, and regulations. Glossary. Archives for the navigation mailing list.
Digital Navigation Publications
Downloadable publications from the National Imagery and Mapping Agency including The American Practical Navigator and Radio Navigational Aids.
Celestial Navigation Data
Astronomical information necessary to plot navigational lines of position from observations of the altitudes of celestial bodies from the U.S. Naval Observatory.
The Complete On-Board Celestial Navigator
About a reference book for navigation at sea. Includes table of contents and purchasing information.
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