 This delineation is basically the same as the original (first) edition of the IHO publication and effectively the same as the second edition.In the second edition, the Great Australian Bight was defined as the only geographical entity between the Australian coast and the Southern Ocean.Coastal maps of Tasmania and South Australia label the sea areas as "Southern Ocean", while Cape Leeuwin in Western Australia is described as the point where the Indian and Southern Oceans meet.