TM-9-6675-262-10
AIMING CIRCLE M2 W/E AND M2A2 W/E
TECHNICAL MANUAL; OPERATOR MANUAL
DECEMBER 2013
TM-9-6675-262-10 - Page 19 of 68
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THEORY OF OPERATION
PRINCIPLES OF OPERATION
Changing the maximum telescope elevation from 800 to 1100 Mils permits greater use
of the Aiming Circle.
The Aiming Circle is basically a telescope mounted on a base
which permits exact azimuth and elevation measurements.
The main housing is
placed in a true level condition by using two types of levels: (1) Circular Level which is
used for coarse leveling, and (2) Tube Levels which are used for fine leveling.
A tube
level on the elbow telescope permits the elbow telescope to be adjusted to a true
horizontal line of sight.
A magnetic compass is located in an oblong box on top of the main housing.
The
magnetic compass needle can be seen through a window or through the magnifier.
Zero azimuth heading with respect to magnetic north or any other selected compass
treading can be made by turning the orienting knobs or the azimuth knob.
Elevation
angle of the telescope is adjusted by turning the elevation knob.
Azimuth and
elevation angles up to 85 mils can be read from the horizontal and vertical centerline
on the reticle while looking through the elbow telescope.
END OF WORK PACKAGE
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