Which of the following statements represent the advantages of using plane table surveying? 1. It is suitable for large and precise work. 2. It is more rapid and less costly than other methods. 3. The chances of omitting necessary measurements are less.

In survey work using a total station with reflector measurements, which of the following sequence of temporary adjustments must be performed at a station?

While carrying out a total station survey on one bank of a 250 m wide river, it is necessary to plot electric transmission posts on the opposite bank. No provision exists for crossing the river and the posts are inaccessible. In which mode should the survey work be done?