Innocent passage is a concept in the law of the sea that allows for a vessel to pass through the territorial waters of another state, subject to certain restrictions. The United Nations Convention on the Law of the Sea defines innocent passage as this:
Passage is innocent so long as it is not prejudicial to the peace, good order or security of the coastal State. Such passage shall take place in conformity with this Convention and with other rules of international law.
Innocent passage concedes the coastal country's territorial sea claim, unlike freedom of navigation, which directly contests it.
The law was codified in 1958 and affirmed in 1982.