Long Forties
Long Forties is a zone of the northern North Sea that is fairly consistently forty fathoms (240 ft; 73 m) deep.
Extent
Long Forties are between the northeast coasts of Scotland and the southwest coast of Norway, centred about 57°N 0°30′E; compare to the Broad Fourteens.
Alternative terms
Forties
The Shipping Forecast area Forties approximates to Long Forties, though with neater boundaries. The north of the latter falls in Viking.
Fladen Grounds
Fladen Grounds is the next more northern, eastern and deeper part of the sea. The Dutch weather service
Etymology
When depth sounding (originally fathoming with rope and plumb weight), the recorded depth would for a long haul remain 40 fathoms. On a traditional imperial measurements nautical chart a great zone with many "40"s appears.
Geology
The Forties Oil Field is the largest
The Forties Formation consists of a lower Shale Member and an upper Sandstone Member, which were deposited in a "middle and lower
See also
- North Sea
- Dogger Bank has map and related places
- Broad Fourteens
- Roaring Forties
- Forties Oil Field
References
- ISBN 0891813063, p. 81-82.
- ISBN 0891813063, p. 82.
- ISBN 0891813063, p. 81.
57°00′N 0°30′E / 57.000°N 0.500°E