What tool is typically used for measuring angles in surveying?

The transit is the tool typically used for measuring angles in surveying. Designed specifically for this purpose, it consists of a telescope mounted on a tripod that can be rotated horizontally and vertically. This capability allows surveyors to obtain precise angle measurements between points. The transit can also be used to sight distant objects and determine their elevation, making it invaluable in various surveying tasks.

In contrast, a plumb bob is primarily utilized for establishing a vertical reference line. A caliper is used for measuring distances or dimensions, particularly in mechanical applications, while a level rod helps in determining horizontal levels but does not measure angles. Each of these tools has its specific applications, but for the measurement of angles, the transit is the most suitable choice due to its design and functionality in the surveying field.