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 protection of the United Kingdom. In 1864, pursuant to the Treaty of London the United Kingdom ceded the United States of the Ionian Islands to the Kingdom of Greece as a gesture of goodwill following Prince Alfred declining to accept the Greek throne despite Greek popular request. Upon the annexation of the Ionian Islands, the flag of the United States ceased to have official status and was replaced by the flag of Greece. Flag of the United States of the Ionian Islands The Flag of the United States of the Ionian Islands was used between 1815 and 1864. The flag