Surveying
A Nautical mile is

One minute arc of the great circle passing through two points
All of these
One minute arc of the longitude
1855.109 m

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Surveying
In the prismatic compass

the line of the sight does not move with the box
the magnetic needle and graduated circle do not move with the box
the magnetic needle moves with the box
the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction

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Surveying
The prismatic compass and surveyor’s compass

give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively
both give QB of a line and WCB of a line
both give WCB of a line
both give QB of a line

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