What is the function of those tripod devices I see construction people using and staring through?
In: Engineering
It’s binoculars placed on a level so that they always point horizontally. They also have a line inside marking the middle.
Other guy takes long ruler, places it on the ground and guy sees through those binoculars a line on some marked height. Now they take this ruler to another point, place it on the ground and look at it. If those point are at the same level then the line will be at the same point on this ruler.
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