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276
eratosthenes
He was the first person to use the word "geography" and invented the discipline of geography as we understand it -
325
phteas
Some would give Timaeus an extra 5 years, bringing the voyage down to 325 BC at earliest -
Nov 13, 1460
prince henry the navigator
of the Kingdom of Portugal and an important figure in the early days of the Portuguese Empire. -
Apr 27, 1521
ferdinand magellan
He was born in Sabrosa, in northern Portugal, but later obtained Spanish nationality in order to serve King Charles I of Spain in search of a westward route to the "Spice Islands" -
benjamin franklin
discovering surface currents and therefore in 1777 published the first map of the gulf stream. -
matthew maury
was an American astronomer, historian, oceanographer, meteorologist, cartographer, author, geologist, and educator. -
Read now Challenger expedition
The Challenger expedition of 1872–76 was a scientific exercise that made many discoveries to lay the foundation of oceanography. The expedition was named after the mother vessel, HMS Challenger. -
SONAR invented
while working for the Submarine Signal Company in Boston, built an experimental system beginning -
bathysphere
3,028 feet -
ptolemy
Ptolemy was the author of several scientific treatises, at least three of which were of continuing importance to later Islamic and European science
