Admiralty Distance Poles at St Abb's Head - geograph

A nautical measured mile is a

nautical mile A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. Historically, it was defined as the meridian arc length corresponding to one minute ( of a degree) of latitude. Today ...

which is marked by two pairs of towers. A mile is measured by sailing on a given bearing and lining up the pairs of towers. The start of the mile is recorded when the first pair of towers line up and the end of the mile recorded when the second pair line up. To accurately measure performance ships must make at least four to six runs in both directions to allow for the wind and tide. There are several nautical measured miles around the British Isles: * Between

Talland Bay Talland ( kw, Tallan) is a hamlet and ecclesiastical parish between Looe and Polperro on the south coast of Cornwall (the parish includes the eastern part of the village of Polperro, where there is a chapel of ease and formerly also the town of W ...

and Hannafore,

West Looe West or Occident is one of the four cardinal directions or points of the compass. It is the opposite direction from east and is the direction in which the Sun sets on the Earth. Etymology The word "west" is a Germanic word passed into some R ...

Cornwall Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlantic ...

. * At

Skelmorlie Skelmorlie is a village in North Ayrshire in the south-west of Scotland. Although it is the northernmost settlement in the council area of North Ayrshire, it is contiguous with Wemyss Bay, which is in Inverclyde. The dividing line is the Kelly B ...

North Ayrshire North Ayrshire ( gd, Siorrachd Àir a Tuath, ) is one of 32 council areas in Scotland. The council area borders Inverclyde to the north, Renfrewshire and East Renfrewshire to the northeast, and East Ayrshire and South Ayrshire to the east and so ...

Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...

. * There are four Admiralty Distance Poles at

St Abb's Head St Abb's Head is a rocky promontory by the village of St Abbs in Scottish Borders, Scotland, and a national nature reserve administered by the National Trust for Scotland. St Abb's Head Lighthouse was designed and built by the brothers Davi ...

Berwickshire Berwickshire ( gd, Siorrachd Bhearaig) is a historic county, registration county and lieutenancy area in south-eastern Scotland, on the English border. Berwickshire County Council existed from 1890 until 1975, when the area became part of th ...

. * There are two consecutive miles on the

Isle of Arran The Isle of Arran (; sco, Isle o Arran; gd, Eilean Arainn) or simply Arran is an island off the west coast of Scotland. It is the largest island in the Firth of Clyde and the seventh-largest Scottish island, at . Historically part of Butesh ...

between South Sannox and Corloch.

References

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See also

References