Surveying
In the prismatic compass

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

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Surveying
Theodolite is an instrument used for

measurement of both horizontal and vertical angles
measurement of horizontal angles only
measurement of vertical angles only
tightening the capstan-headed nuts of level tube

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