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 K S
S E R V I C E ( C o n t i n u e d)
4.
A l i g n m e n t o f
t h e o d o l i te
h o r i z o n t a l c i r c le
to reference mir-
r or
a.
Place the MODE SELECT switch
(1) to THEO ILLUM (2).
b.
Adjust reticle focus (1) to obtain a sharp, clear
focus of the reticle seen through the tele-
scope eyepiece (2).
c .
Release horizontal (1) and vertical locks (2) on
the theodolite (3).
d.
Align telescope (4) to the mirror and tighten
horizontal (1) and vertical locks (2).
2-69
