Bowditch's American Practical Navigator
The American Practical Navigator (colloquially often referred to as Bowditch), originally written by Nathaniel Bowditch, is an encyclopedia of navigation. It serves as a valuable handbook on oceanography and meteorology, and contains useful tables and a maritime glossary. In 1867 the copyright and plates were bought by the Hydrographic Office of the United States Navy, and as a U.S. Government publication, it is now available free online. It is not only a notable book but is considered one of America's nautical institutions.