-
200
Ptolemy
His major contribution was his ability to establish lattiutude and longitude lines on a map of many places. -
240
Eratosthenes
Calculated the earts circumfrance -
325
Pytheas
He made a voyage around northern Europe and wrote a book about his accounts. -
Jan 5, 1000
Compas
Help navigate the seas -
Aug 7, 1433
Prince Henry the Navigator
Under the orders from Prince Henry Gil Eannes reached the tip of Africa and sailed around the Cape. -
Oct 11, 1492
Christopher Columbus
found the caribean islands -
Jan 7, 1497
Vasco de Gama
Found the first sea route from Portugal to the east. -
Jan 5, 1519
Ferdinand Magellan
Sailed around the world -
James Cook
Found Australia -
Benjamin Franklin
In 1784, Franklin suggested following the Chinese model of dividing ships' holds into watertight compartments so that if a leak occurred in one compartment, the water would not spread throughout the hold and sink the ship. -
Matthew Maury
Matthew Maury studied the current paths of the ocean using botles and in 1855 published a book about oceanography. -
The Challenger Expedition
The Challenger expedtion 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. -
SONAR
A technique used to navigate, communicate with, or detect other vessels. -
Bathysphere
The Bathysphere was a steel vessel that was use for underwater viewing and exploration. -
GPS
The airforce realsed the final satalite and started a network called gps that made navigation easier and more efficant.
