Surveying
There are two stations A and B. Which of the following statements is correct?

The fore bearing of AB is AB
The fore and back bearings of AB differ by 180°
The back bearing of AB is BA
All listed here

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Surveying
The cross hairs in the surveying telescope are placed

much closer to the objective lens than to the eye piece
midway between eye piece and objec-tive lens
much closer to the eye-piece than to the objective lens
anywhere between eye-piece and objective lens

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