TM 5-6675-250-10
2-1.
OPERATOR'S CONTROLS AND INDICATORS - Continued
(15) Plate level (15). The plate level is
provided to indicate the level of the
theodolite and the GRU.
(16) Horizontal circle setting control (16).
The horizontal circle setting control
is used to set the horizontal circle
during theodolite calibration.
(17) Mounting plate and reference mirror
(17). The theodolite calibration
mounting plate and reference mirror
are used for aligning the theodolite
horizontal circle with the follow-up by
p r o v i d i n g a fixed reference point.
Alignment of the horizontal circle is
a c c o m p l i s h e d with power on and
prior to the beginning of the azimuth
determination operation.
(18) Theodolite scale lamp eyepiece (18).
The theodoiite scale lamp eyepiece is
used to view the optical scales. The
eyepiece can be swiveled to allow the
optical scales to be viewed from any
position.
2-6
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