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Eratosthenes
first determined
the world’s circumference -
Jan 1, 1430
Prince Henry the Navigator
Recognized the oceans importants to trade and commerce and estblished a center of learning fro the marine scinces. -
Jan 7, 1513
Ferinand magellan
circumnavigated
the globe through a passage
way at 52° S latitude now
called the Straights of
Magellan. -
Benjamin Franklin Maps
it helped trade and shipping from america to europe -
James Cook
He discovered hawaiians -
Matthew Maury study of navigation meteorology, and wind curre
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 and drastically reduced the length of ocean voyages -
Challenger Expedition
gather data on a wide range of ocean features, including ocean temperatures seawater chemistry, currents, marine life, and the geology of the seafloor -
Pytheas
He measured the angle between the horizon and the
North Star (Polaris is located directly above the
North Pole). It helped us navigate
