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Top > Science > Earth Sciences > Geomatics > Navigation > Water
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» Bowditch Online - Navigation course containing 38 chapters covering charts, radar, astronomy, and regulations. Glossary. Archives for the navigation mailing list.
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» 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.
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» Digital Navigation Publications - Downloadable publications from the National Imagery and Mapping Agency including The American Practical Navigator and Radio Navigational Aids.
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» Navigation Information Connection - Links and photos associated with the U.S. Inland Waterway System. Includes real time location and queue lists of towboats and barges operating on U.S. inland waterways.
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