Gulf stream

Franklin, after traveling from America to Europe multiple times, became aware of the difference in eastward and westward sailing times due to ocean currents. He produced a map of the Gulf Stream, beginning of the scientific study of ocean currents.
 Benjamin Franklin England 1770 Gulf stream

Franklin, after traveling from America to Europe multiple times, became aware of the difference in eastward and westward sailing times due to ocean currents. He produced a map of the Gulf Stream, beginning of the scientific study of ocean currents.