Navigation course containing 38 chapters covering charts, radar, astronomy, and regulations. Glossary. Archives for the navigation mailing list.

Astronomical information necessary to plot navigational lines of position from observations of the altitudes of celestial bodies from the U.S. Naval Observatory.

Downloadable publications from the National Imagery and Mapping Agency including The American Practical Navigator and Radio Navigational Aids.

A free online course in basic coastal navigation.

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.

Contains nine chapters covering piloting, plotting, navigation aids, and tides. Related equations and tables.

About a reference book for navigation at sea. Includes table of contents and purchasing information.