The zero of the graduated circle of a prismatic compass is located at-
South end
Because the bearing is read at the prism (which is on the observer's side, opposite the object sighted), the zero must be positioned at the South end of the magnetic needle's diameter to ensure that when the needle points North, the reading seen through the prism corresponding to the North direction is 0^{\circ} (or 360^{\circ}).
Important Questions from Compass Surveying and Theodolite
Which of the following statement is CORRECT for whole circle bearing?
Least count of a theodolite is ________
For measurement of vertical angles through theodolite, the instrument should be levelled with reference to the ________ bubble and the ________ clamp that is used to rotate the telescope in the vertical plane.
The following statements given pertain to theodolite used in surveying. Identify the incorrect statement
The use of Electronic Digital Theodolite attached to a total station is to measure:
