Carry out Fly Leveling using Auto Level
Fly levelling is a very approximate form of levelling in which sights are taken as large as possible. In this method a line of levels is run to determine approximately reduced levels of the points carried out with more rapidly and less precision. It is a levelling that is done to connect benchmark to the starting point of the survey line.
In this levelling only back sightand fore sight readings are taken and auto level is moved strictly on the line joining benchmark and starting point of survey line.