Surveying
If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at that place is

23° S
13° W
77° N
13° E

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Surveying
Refraction correction

completely eliminates curvature correction
adds to the curvature correction
partially eliminates curvature correction
has no effect on curvature correction

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Surveying
In the prismatic compass

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 magnetic needle moves with the box
the line of the sight does not move with the box

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