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300
pytheas
was a Greek geographer and explorer from the Greek colony, Massalia (modern day Marseilles). He made a voyage of exploration to northwestern Europe at about 325 BC. -
Jan 7, 1438
henry the navigator
He is most famous for the voyages of discovery that he organised and financed, which eventually led to the rounding of Africa and the establishment of sea routes to the Indies. -
Jan 11, 1519
ferdinand magellan
was a Portuguese explorer -
benjamin franklin
Benjamin Franklin (January 17, 1706 [O.S. January 6, 1705[1]] – April 17, 1790) was one of the Founding Fathers of the United States. -
james cook
was a British explorer, navigator and cartographer, ultimately rising to the rank of Captain in the Royal Navy. -
matthew maury
United States Navy was an American astronomer, historian, oceanographer, meteorologist, cartographer, author, geologist, and educator. -
challenge expedition
Modern oceanography began with the Challenger Expedition between 1872 and 1876. It was the first expedition organized specifically to gather data on a wide range of ocean features, including ocean temperatures seawater chemistry, currents, marine life, and the geology of the seafloor -
SONAR
is a technique that uses sound propagation (usually underwater, as in Submarine navigation) to navigate, communicate with or detect other vessels. -
bathysphere
is a spherical deep-sea submersible which is unpowered and is lowered into the ocean on a cable. -
ptolemy
was a Roman citizen of Egypt who wrote in Greek -
erastosthenes
was a Greek mathematician, elegiac poet, athlete, geographer, astronomer, and music theorist.
