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325
BC Pytheas
sailled northward from Greece to Iceland and worked out a method for determining latitudes and using astronomical measurements proposed that tides were a product of lunar influences -
Period: Jan 5, 1410 to Jan 5, 1460
Prince Henry the Navigator
established an marine observatory to improve the Portuguese sailing endeavors -
Jan 5, 1513
Ferdinand Magellan
circumnavigated the globe through a passageway at 52 degrees South latitude now called the straights of Magellan. -
Period: to
James Cook
calculated Longitudes and published his findings in the royal Society's Philosophical Transactions, which gained him notoriety -
Benjamin Franklin
Benjamin Franklin developed an stream chart to help captains ride through the currents and take teo weeks off traveling time. -
Matthew Maury
Made uniform methods of making nautical meteorological observations at sea -
Challenger Expedition
Captain George Nares traveled 70,00 nautical miles from Portsmouth, England discovering 4,000 new unknown species. -
SONAR
is a technique that uses sound propagation (usually underwater, as in Submarine navigation) to navigate, communicate with or detect other vessels. IT harms other marine mammals as it confuses them because other animals such as whales use the same communication or prey detection system. -
bathysphere
is a spherical deep-sea submersible which is unpowered and is lowered into the ocean on a cable. Allows deep sea viewing and going underwater -
Period: to 276
BC Eratosthenes
determined the worlds circumference while looking down a well on a summer solstice
