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325
Pytheas
He sailed northward from Greece to Iceland. Worked out a method in determining Latitudes and using astronomical measurements proposed that tides were a product of lunar influences. -
Jan 6, 1400
Prince Henry the Navigater
Conqured one of the greatest trades problems. Getting around the tip of Africa. -
Jan 6, 1513
Ferdinand Magellan
Cicumnavigated the globe through a passageway at 50 degrees S Latiude now called the Straights of Magellan. -
James Cook
Cook commanded three voyages of discovery for Great Britain, and sailed around the world twice. The British Admiralty appointed Cook, then a Lieutenant, to lead a scientific expedition that would sail to the island of Tahiti in the south Pacific to establish an astronomical observatory. -
Benjamin Franklin
Published the first map of the gulf stream, -
Period: to
Matthew Maury
US Navy officer who compiled navel charts and Instrumentations that when used logged, and compiled allowed sailers to avoid catostrophic weather conditions, currents, and tides. -
Period: to
Challenger Expedition
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. -
Period: to 276
Eratosthenes
First determined the worlds circumfrence by using observations while looking down a well on the summer solstice. He just miscalculated off by 25 miles.
