Wide, from Cape Agulhas to Enderby Land, 2200 m., and from Tasmania to Wilkes Land, 1550 m., while the meridianal extension of the Indian Ocean is 6200 m., of the Pacific, 9300 m., and of the Atlantic, 12,500 m., measuring across the North Pole to Bering Strait.
The " Challenger " expedition found it on the Agulhas Bank, do the eastern coasts of Australia, Japan, South America and on the west coast of Portugal.
Thus in December 1906, an iceberg was seen off the mouth of the La Plata in 38° S., and in 1840 one was seen near Cape Agulhas in 35° S.
In a similar manner the Brazil current, the Agulhas current and the East Australian current originate from the drift of the south-east trades, and in the North Pacific the Japan current arises from the north-east trade drift.
Rounding the stormvexed Cape of Good Hope the shore trends south-east in a series of curves, forming shallow bays, until at the saw-edged reefs of Cape Agulhas (Portuguese, Needles) in 34° 51' 15" S.
Above the sea; Cape Agulhas 455 ft.
Off the east and south shores of the colony the Mozambique or Agulhas current sweeps south-westward with force sufficient to set up a back drift.
It is a deflected stream from the west drift of the " roaring forties " and coming from Antarctic regions is much colder than the Agulhas current.
Off the southern point of the continent the Agulhas current meets the west drift, giving rise to alternate streams of warm and cold water.
At Cape Town, increases to the east, the coast not only trending north towards the equator but feeling the effect of the warm Mozambique or Agulhas current.
By Arabia and Africa, and the meridian passing southwards from Cape Agulhas; and E.
When the main equatorial current reaches the African coast a minor stream is sent northwards to the source of the Indian counter-current, but the discharge is chiefly by the Mozambique current, which south of Cape Corrientes becomes the Agulhas current, one of the most powerful stream currents of the globe.
On the west coast of Madagascar and on the banks of the African coast south of 30° 5., reaction currents or "backdrifts" move in the opposite direction along the flanks of the Agulhas current; these back-drifts are of great importance to navigation.
On clearing the land south of the Cape the waters of the Agulhas current meet those of the west wind drift of the Southern Ocean, and mingle with them in such a manner as to produce, by interdigitation, alternate strips of warm and cold water, which are met with at great distances south-west and south of the Cape.
From the most northerly point, Ras ben Sakka, a little west of Cape Blanc, in 37°21' N., to the most southerly point, Cape Agulhas, 34° 51' 15" S., is a distance approximately of 5000 m.; from Cape Verde, 17° 33' 22" W., the westernmost point, to Ras Hafun, 51° 27' 52" E., the most easterly projection, is a distance (also approximately) of 4600 m.