103The sovereignty enjoyed by a coastal State over its territorial sea is, however, to be understood as being without prejudice to the obligation placed on that State by Article 24(1) of the Convention on the Law of the Sea not to obstruct, except in accordance with that convention, the right of foreign ships to innocent passage through its territorial sea, which should be understood, inter alia, under Articles 17 and 18 of that convention, as the right to navigate through that sea for the purpose of proceeding to the internal waters of the coastal State, calling at one of the ports of that State, or proceeding from that port, those waters or that sea (see, to that effect, judgment of 24 November 1992, Poulsen and Diva Navigation, C‑286/90, EU:C:1992:453, paragraph 25).
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