Where does the term "high seas" originate from?

The term "high seas" refers to the open ocean, beyond the territorial waters of any country. It is a legal term with a long history, dating back to the Roman Empire.

The Roman Empire divided the sea into two parts: the "mare nostrum" (our sea), which was the Mediterranean Sea, and the "mare externum" (outer sea), which was the rest of the world's oceans. The mare externum was considered to be res communis, or common property, and it was open to all nations.

This division of the sea was adopted by other European countries in the Middle Ages, and it became the basis for the modern law of the sea. The high seas are defined as the waters beyond the territorial waters of any country, and they are open to all nations for navigation, fishing, and other purposes.

The term "high seas" is still used today in international law, and it is a fundamental principle of the law of the sea.

  • What was the Roman Empire's division of the sea?
  • What did the Roman Empire consider the "mare externum" to be?
  • When was the division of the sea adopted by other European countries?
  • What are the high seas defined as?
  • What are the high seas open to?
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