Figure 13-31.-Kinds of angles measured at the occupied station.

included; for example, ET for electronic traverse or TT for theodolite- or transit-tape traverse. Horizontal angles are always measured at the occupied station by pointing the instrument toward the rear station and turning the angle clockwise to the forward station for the direct angle, and clockwise from the forward to the rear station for the explement (fig. 13-31). If a deflection angle is to be used, plunge the instrument telescope, after sighting the rear station, and read the angle left or right of the forward station. NOTE: Office procedures for traverse computations and adjustments, methods of computing traverse area, and plotting horizontal control are discussed at the EA2 level. Figure 13-31.-Kinds of angles measured at the occupied station. 13-30