TM 9-1290-357-15
ing the worm and worm gear permitting rapid
of larger azimuth angles. Clear definition of the
settings in azimuth. When the azimuth mecha-
reticle pattern and of the field of view is obtained
by rotation of the eyepiece focusing sleeve.
nism is engaged the azimuth micrometer indicate
fine settings.
the elevation knob causes the telescope assembly
ing mechanism rotates the aiming circle M1 in
to rotate vertically, approximately 142 mils above
azimuth as a unit without changing scale indica-
or below the horizontal. The telescope level (fig.
tions. This permits setting the instrument with
respect to a reference point. The housing is clamp-
ed to the vertical spindle (fig. 1-1) of the tripod
by clamping screw which may be released to
a. Azimuth Mechanism. Rotation of the
permit free movement of the aiming circle M1
azimuth knob (fig. 1-2) causes the telescope as-
about the spindle.
sembly and body, with the azimuth scale index
to rotate horizontally 360 (6400 mils). Circular
16. Magnetic Needle and Magnetic
level assembly (fig. 1-3) indicates when the
Needle Magnifier Assemblies
azimuth scale is in a horizontal plane. Azimuth
worm shoe (throwout device) used for disengag-
