International waters have no sovereignty, ergo is "Terra nullius" as no state controls it. All states have the freedom of: fishing, navigation, overflight, laying cables and pipelines, as well as research.
Oceans, seas, and waters outside national jurisdiction are also referred to as the high seas or, in Latin, mare liberum (meaning free sea). The Convention on the High Seas, signed in 1958, which has 63 signatories, defined "high seas" to mean "all parts of the sea that are not included in the territorial sea or in the internal waters of a State" and where "no State may validly purport tosubject any part of them to its sovereignty." The Convention on the High Seas was used as a foundation for the United Nations Convention on the Law of the Sea, signed in 1982, which recognized Exclusive Economic Zones extending 200 nautical miles from the baseline, where coastal States have sovereign rights to the water column and sea floor as well as the natural resources found there.
The high seas make up 50% of the surface area of the planet and cover over two thirds of the ocean.