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
United States of the Ionian Islands United States of the Ionian Islands The United States of the Ionian Islands (, literally "United State of the Ionian Islands"; ) was a state and amical protectorate of the United Kingdom between 1815 and 1864. It was the successor state of the Septinsular Republic. It covered the territory of the Ionian Islands, in modern Greece, and it was ceded to Greece as a gift of the United Kingdom to the newly enthroned King George I after the Resolution for union with Greece which was proposed by the Party of the Radicals. Before the French Revolutionary Wars, the Ionian Islands