TM 5-6675-250-20
2-16. DETERMINATION OF AZIMUTH VALUE FOR REFERENCE MIRROR (Continued)
L O C A T I O N / l T EM
A C T I ON
R E M A R KS
SERVICE (Continued)
c.
Coarse level the instrument by releasing one
of the tripod leg clamps (1).
d.
Adjust the leg (2) to obtain a level indication
on the tripod circular level (3). Repeat pro-
cedure for each of the other two legs.
e.
Rotate the alidade 90 degrees and adjust both
the remaining legs.
f.
Continue the process until the alidade can be
rotated 360 degrees with no more than ± 1/2
division displacement of the bubble.
N O TE
Prior to starting an azimuth determination, the alignment of the horizontal
circle shall be checked and adjusted if necessary. Instructions for perform-
ing the alignment procedure are provided in the following paragraph.
2-68
