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
