TM 5-6675-307-14
Figure 2-17. Line-of-sight adjustment.
e. Vertical Circle. Index.
telescope bubble as reference. Level altitude level
(1) Testing.
using altitude tangent screw.
(b) With telescope direct, aim on a
(a) Carefully level theodolite (fig. 2-14)
clearly defined target and record elevation angle.
using plate bubble as reference. Level telescope using
2-18
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