I'm sorry, I'm not quite sure what your question is. Are you asking, "Which river flows down the East Side of Manhattan, and into the Atlantic Ocean?"
If so, then, the answer is the East River. However, the East River is not a true river, as it connects to the ocean on both sides. It is an estuary or tidal strait. The East River flows south from the bay known as the Long Island Sound, down the east side of Manhattan and the west side of Queens and Brooklyn, and into the Atlantic Ocean.
The Hudson River (which IS a true river) flows down the west side of Manhattan, and into the Atlantic Ocean.
It has no 'purpose' it is a natural occurring division. The continental divide is a line that runs down through the Rocky Mountains and on the west side of the line rivers and streams flow down toward the Pacific Ocean and on the east side of the line rivers and streams flow towards the Atlantic Ocean.
The Continental Divide (in North America) marks the direction (towards the Pacific or Atlantic and Gulf of Mexico) rivers flow.
It is known as the Continental Divide.
through the middle of the Pacific Ocean
Pacific Ocean
Pacific ocean
It passes through the middle of the Pacific Ocean.
The Pacific Ocean.The arctic, the pacific, and the southern.
the edge of a tide line on any beach on any coastline on the Pacific Ocean
Argentina has a coast line along the pacific ocean. at its northern end there is a section of Uruguay that is between it and the pacific ocean.
Pacific Ocean, Atlantic Ocean, Indian Ocean
pacific ocean