included; for example, ET for electronic traverseor TT for theodolite- or transit-tape traverse.Horizontal angles are always measured at theoccupied station by pointing the instrumenttoward the rear station and turning the angleclockwise to the forward station for the directangle, and clockwise from the forward to therear station for the explement (fig. 13-31). Ifa deflection angle is to be used, plunge theinstrument telescope, after sighting the rearstation, and read the angle left or right of theforward station.NOTE: Office procedures for traversecomputations and adjustments, methods ofcomputing traverse area, and plotting horizontalcontrol are discussed at the EA2 level.Figure 13-31.-Kinds of angles measured at the occupied station.13-30
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