Persian Gulf at its narrowest, in the Strait of Hormuz. The waters are overall very shallow, with a maximum depth of and an average depth of . Countries with a coastline on the Persian Gulf are (clockwise, from the north): Iran; Oman's Musandam exclave; the United Arab Emirates; Saudi Arabia Qatar, on a peninsula off the Saudi coast; Bahrain, on an island; Kuwait; and Iraq in the northwest. Various small islands also lie within the Persian Gulf, some of which are the subject of territorial disputes between the states of the region. The International Hydrographic Organization defines the Persian Gulf's southern limit
Quoin Island (Persian Gulf) Quoin Island (Persian Gulf) Quoin Island (also known as "As Salamah Island" and "Great Quoin Island") is the largest of three islands of the As Salamah Archipelago. It is the northernmost landmass of Oman and the traditional "way point" used by ships to define the entrance or exit from the Persian Gulf. Once a ship is declaired a position of "Passed Quoin Inbound" the insurance rates for the ship will increase. The island has a triangular outline, is about 770 meters long and up to 530 meters wide, yielding an area of about 22 hectares. Quoin Island, Oman, is not