Adriatic Sea southeast, the Adriatic Sea connects to the Ionian Sea at the wide Strait of Otranto. The International Hydrographic Organization (IHO) defines the boundary between the Adriatic and the Ionian seas as a line running from the Butrinto River's mouth (latitude 39°44'N) in Albania to the Karagol Cape in Corfu, through this island to the Kephali Cape (these two capes are in latitude 39°45'N), and on to the Santa Maria di Leuca Cape (latitude 39°48'N). It extends from the northwest to the southeast and is wide. It covers and has a volume of . The Adriatic extends northwest from 40° to
Flag of the United States of the Ionian Islands the Ionian Islands' national flag would be the flag of the Septinsular Republic, a Lion of Saint Mark holding a Bible on a blue background, with a Union Jack in the upper corner closest to the flagstaff to symbolise the British protectorate. During shipping in the Black Sea and the Eastern Mediterranean, the flag of the United States of the Ionian Islands would often be used as a flag of convenience by Greek ships to purport that they enjoyed the protection of the British Empire. The British ambassador to the Ottoman Empire, Percy Smythe, 6th Viscount Strangford, was annoyed by