The Long Forties is an area of the northern North Sea that is fairly consistently forty fathoms (73 metres) 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. The Dutch weather service KNMI uses for the same area the name of the Fladen Grounds, a slightly more northernly and deeper part of the North Sea.
