TM 5-6675-250-20
2-16. DETERMINATION OF AZIMUTH VALUE FOR REFERENCE MIRROR (Continued)
L O C A T I O N / I 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)
(3) Record the reverse hori-
zontal and vernier scale
r e a d i n g s i n t h e s a me
m a n n e r a s u s e d f o r
direct readings.
( 4 ) A d d h o r i z o n t a l a n d v e r -
n i e r s c a l e r e a d i n g s to
o b t a i n r e v e r s e h o r i z o n -
tal reading.
n.
Obtain the mirror reading (1) by doing the
f o l l o w i n g:
( 1 ) A d d 3 2 0 0 . 0 0 t o t h e
reverse reading.
( 2 ) A d d t h e d i r e c t a n d
reverse readings.
(3) Divide (2) by 2 to obtain
t h e
m e a n
m i r r o r
r e a d i n g .
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