Correct option is C
The process of revolving the telescope of an instrument, such as a theodolite, around its vertical axis in a horizontal plane is known as "swinging." This is a standard procedure in surveying to observe different points or angles from a fixed position.
Important Key Points:
1. Swinging Definition: Swinging refers to rotating the telescope about the vertical axis in the horizontal plane, allowing the observer to sight different objects or directions without altering the instrument's height or location.
2. Purpose in Surveying:
· Used to take measurements at different angles.
· Helps ensure accurate angular observations for triangulation or leveling tasks.
3. Application: Commonly employed in instruments like theodolites and total stations during surveying tasks.
