Why do people study ocean currents?

Question

What are a few reasons?

Answer 1

To learn about ocean currents.

Answer 2

The ocean currents carry huge amounts of heat from the equatorial region to the north and south. This has a very powerful influence on the world's weather. Another reason is for navigation. It takes less of a ship's fuel to travel with the currents than against. Changes in the normal currents can seriously affect shipping and commerce around the world.