Borders of the oceans seas it contains) as follows: Note that these definitions exclude any marginal waterbodies that are separately defined by the IHO (such as the Kara Sea and East Siberian Sea), though these are usually considered to be part of the Arctic Ocean. The CIA defines the limits of the Arctic Ocean differently, as depicted in the map comparing its definition to the IHO's definition. The Atlantic Ocean separates the Americas from Europe and Africa. It may be further subdivided by the equator into northern and southern portions. The 3rd edition, currently in force, of the International Hydrographic Organization's (IHO) "Limits of
Freedom of the seas Dutch jurist and philosopher Hugo Grotius wrote what is considered the foundation of international legal doctrine regarding the seas and oceans – "Mare Liberum", a Latin title that translates to "freedom of the seas". The Grotian concept of "freedom of the sea" was only accepted after a century long debate between Grotius' ideas and John Seldens. While it is generally assumed that Grotius first propounded the principle of freedom of the seas, countries in the Indian Ocean and other Asian seas accepted the right of unobstructed navigation long before Grotius wrote his "De Jure Praedae" ("On the Law of Spoils")