An automatic level, also known as a self-leveling level, is a surveying instrument used to measure horizontal and vertical angles and distances with a high degree of accuracy. It is equipped with a compensator mechanism that automatically aligns the level's line of sight with the true horizontal plane, making it easier and faster to use than a dumpy level. To use an automatic level, it is set up on a tripod and roughly leveled using the bubble level and leveling screws. The compensator then takes over, automatically aligning the line of sight with the horizontal plane. The telescope is sighted on a leveling rod held at the point of interest, and the height or angle is read from the rod's markings. Automatic levels are commonly used in construction, land surveying, and engineering for tasks such as setting grades, establishing building heights, and determining elevations. Their self-leveling feature makes them highly efficient and suitable for a wide range of leveling applications.