TM-9-1290-262-24-P
AIMING CIRCLE, M2A2, W/E
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT,AND GENERAL SUPPORT MAINTENANCE MANUAL
SEPTEMBER 1994
TM-9-1290-262-24-P - Page 13 of 192
ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-72/74
1-7. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES.
a. The aiming circle looks very similar to a surveyor’s transit.
b. Rugged construction allows the aiming circle to be operated under a wide range of weather
conditions.
c. The aiming circle is used for precise measurement of azimuth and elevation angles.
d. The telescope is a low power, fixed focus instrument. The elbow bend in the telescope makes
the instrument easier for the operator to use.
e. A mounting mechanism provides the elbow telescope with unlimited azimuth movements and
limited elevation movements.
f. The aiming circle can be used to shoot the sun or for general topographical surveying.
1-8. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.
a. Aiming Circle. Mounts on the tripod head. The aiming circle consists of an elbow telescope
that is provided with leveling screws, level indicating vials, and elevation and azimuth scales.
b. Tripod. Consists of three legs hinged to a flat tripod head. The wooden legs are adjustable in
length. The flat tripod head contains a screw assembly that secures the aiming circle to the tripod
head. The screw also contains a hook for hanging the plumb bob string.
c. M51 Instrument Light. The tube contains two batteries, a rheostat type switch, and two wire
cables, each with a specialized light.
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