Four oceans dividing line

The dividing line between the Pacific Ocean and the Arctic Ocean: it starts from Cape Jakonyov in northeastern Russia in the west, passes through Great Britain and Little Diomid in the Bering Strait, and reaches Cape Prince of Wales in Seward Peninsula at the western end of Alaska, USA. It is the narrowest part of the Bering Strait.

The dividing line between the Pacific Ocean and the Indian Ocean: it starts from the northern mouth of the Malacca Strait in the north, along the west coast of Sumatra and the south coast of Java, passes through the Arafura Sea and the Tuozeus Strait, and then reaches the Antarctic continent along the east coast of Australia and the east longitude 146 5 1' line at the southeast corner of Tasmania.

The dividing line between the Pacific Ocean and the Atlantic Ocean: In the Drake Strait, it is roughly bounded by the line 6716' west longitude passing through Cape Horn at the southern tip of South America.

The dividing line between the Atlantic Ocean and the Arctic Ocean: it starts from the east entrance of Hudson Bay in the west, passes through davis strait, Danish Strait, Iceland-Faroe Threshold, Will-Thomson Ridge and markel-Frug Island in shetland islands, and reaches the shallow tasting point on the southwest coast of Norway. The Atlantic Ocean and the Indian Ocean pass through Cape Aguilar at the southern tip of the African continent from the 20 east longitude line to the Antarctic continent.