Matthew Fontaine Maury American astronomer, oceanographer, and historian (d. 1873)
Matthew Fontaine Maury (January 14, 1806 – February 1, 1873) was an American astronomer, historian, oceanographer, meteorologist, cartographer, author, geologist, educator, and naval officer for the United States and then the Confederacy. He was a devout Christian and, after reading Psalm 8:8, was determined to find "the paths of the seas".

He was nicknamed "Pathfinder of the Seas" and "Father of Modern Oceanography and Naval Meteorology" and later, "Scientist of the Seas" for his extensive works in his books, especially The Physical Geography of the Sea (1855), the first such extensive and comprehensive book on oceanography to be published.

In 1825, at 19, Maury obtained, through US Representative Sam Houston, a midshipman's warrant in the United States Navy. As a midshipman on board the frigate USS Brandywine, he almost immediately began to study the seas and record methods of navigation. When a leg injury left him unfit for sea duty, Maury devoted his time to the study of navigation, meteorology, winds, and currents.

He became Superintendent of the United States Naval Observatory and head of the Depot of Charts and Instruments. There, Maury studied thousands of ships' logs and charts. He published the Wind and Current Chart of the North Atlantic, which showed sailors how to use the ocean's currents and winds to their advantage, drastically reducing the length of ocean voyages. Maury's uniform system of recording oceanographic data was adopted by navies and merchant marines around the world and was used to develop charts for all the major trade routes.

With the outbreak of the American Civil War, Maury, a Virginian, resigned his commission as a US Navy commander and joined the Confederacy. He spent the war in the South as well as an envoy of the Confederacy to Great Britain, Ireland, and France. He helped the Confederacy acquire a ship, CSS Georgia, while also trying to convince several European powers to help stop the war. Following the war, Maury was eventually pardoned and accepted a teaching position at the Virginia Military Institute in Lexington, Virginia.

He died at the institute in 1873, after he had completed an exhausting state-to-state lecture tour on national and international weather forecasting on land. He had also completed his book, Geological Survey of Virginia, and a new series of geography for young people.