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 E M
A C T I O N
R E M A R KS
SERVICE (Continued)
af.
Adjust reticle focus (26) to obtain a sharp,
clear focus of the reticle seen through the
telescope eyepiece (27).
a g .
Release horizontal (28) and vertical locks (29)
on the theodolite (30).
a h.
Align telescope (31) to the mirror and tighten
horizontal (28) and vertical locks (29).
ai.
Adjust telescope focus (32) until
autocollimated image (a bright green cross)
appears in clear focus.
2-84
