Changes

Some consider the Arctic, Atlantic, Indian, and Pacific to be the world's four oceans. Now, those that side with the number five can add the fifth new ocean and call it the Southern Ocean or the Antarctic Ocean, thanks to the International Hydrographic Organization (IHO).<ref>[https://www.thoughtco.com/the-new-fifth-ocean-1435095 The New Fifth Ocean]</ref>}}

Some consider the Arctic, Atlantic, Indian, and Pacific to be the world's four oceans. Now, those that side with the number five can add the fifth new ocean and call it the Southern Ocean or the Antarctic Ocean, thanks to the International Hydrographic Organization (IHO).<ref>[https://www.thoughtco.com/the-new-fifth-ocean-1435095 The New Fifth Ocean]</ref>}}

== History of exploration ==

== History of exploration of the Southern Ocean ==

The cruise company Hurtigruten says about the history of the exploration of the Southern Ocean:

The cruise company Hurtigruten says about the history of the exploration of the Southern Ocean: