The equator
There is a North and a South Atlantic
The region that divides North and South Korea is called the DEMILITARIZED ZONE.
It is in generic terms, the Atlantic Ocean which is divided in cartography by the equator into the South Atlantic Ocean for those areas below the and the North Atlantic Ocean for those that lie above the equator which divides both of those continents.
The Panama Canal is a small waterway that separates North America from South America. The canal also connects the Atlantic Ocean to the Pacific Ocean.
Atlantic ocean
The Atlantic Ocean divides North America from Europe.
It is not a sea it is an Ocean, the (North) Atlantic Ocean.
The equator is equidistant between the north and south poles.
equator
North Atlantic
North atlantic, south atlantic, north pacific, and south pacific.
Nothing.