Long Forties

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The Long Forties is an area of the northern North Sea that is fairly consistently forty fathoms (73 meters) deep (thus, on a nautical chart with depth shown in fathoms, a long area with many "40" notations). It is located between the northeast coast of Scotland and the southwest coast of Norway, centred about 57°N 0°30′E. Compare to the Broad Fourteens.

The Shipping Forecast area "Forties" is named after it.