Plane table set is used in surveying and related disciplines to provide a solid and level surface on which to make field drawings, charts and maps.
Plane table is set over a point and brought to precise horizontal level and drawing sheet is attached to the surface and an alidade is used to sight objects of interest.
We provide modern type of the instrument a rule with a telescopic sight, that can be used to construct a line on the drawing that is in the direction of the object of interest.