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 O N
R E M A R KS
a o.
Record the vernier scale reading (39).
a p.
Obtain the direct horizontal reading by adding
the recorded readings of the horizontal and
vernier scales .
2-87