308:). The numbering of Quadrants follows several series: 1-58 (the original North Sea sequence); 71-75, 82-89, 91-113 (south-west of the UK and bordering France and the Republic of Ireland); 124-135, 137-144, 147-155, 157-166, 168-176 (the Atlantic west of Scotland); 204-225 (the North Sea north of Shetland and bordering Norway); 337-339, 341-349, 351-359 and 362-369 (the Atlantic west of the 124-176 sequence).
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The UKCS is divided into numbered rectangular
Quadrants, each one degree of latitude by one degree of longitude. Each Quadrant is further subdivided into 30 numbered Blocks (each 10 minutes latitude by 12 minutes longitude, thus each Quadrant has 5 blocks East-West by 6 blocks North-South), as shown
161:. The UK continental shelf is bordered by Norway, Denmark, Germany, the Netherlands, Belgium, France, and the Republic of Ireland. A median line, setting out the domains of each of these nations, was established by mutual agreement between them: - see the
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While the depth of the UK Continental Shelf varies significantly, the shallowness of the North Sea at an average depth of 95m has facilitated the development of
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This numbering system then forms the identification for a particular oil or gas development. For example, the
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from specific areas and regulates how much they can produce over what period.
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Responsibility for the mineral rights of the UKCS rests with the
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Department for
Business, Energy and Industrial Strategy
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