The Bay of Pomerania (Polish: Zatoka Pomorska; German: Pommersche Bucht; Kashubian: Pòmòrskô Hôwinga) is a basin in the southwestern Baltic Sea, off the Pomeranian shores of Poland and Germany. It stretches between the northernmost tip of the island of Rugia called Gellort northwest of Cape Arkona in the west, and the Gąski Lighthouse east of Kołobrzeg in the east. In the south, it is bounded by the islands of Usedom/Uznam and Wolin, which separate it from the Szczecin Lagoon which is flown through by the Oder River, and is connected to the bay by three straits, the Dziwna, Świna, and Peenestrom. The Bay of Greifswald with the islands of Koos and Vilm is a large sub-bay in the southwest of the Bay of Pomerania. Apart from Rugia, Usedom/Uznam, and Wolin, the islands Greifswalder Oie and Rud