ARMY TM 5-6675-308-12
MARINE CORPS TM 08837A-12/1A
Table 3-1. Operator/ Crew Controls, Indicators, and Connectors -- Continued
Function
Control, indicator, or connector
Used to align the theodolite to the IMU during all optical
Porro prism
measurements
Used to level the porro prism
Level adjust knob
Indicates level of the porro prism
Level
Used with theodolite stadia lines to measure distance between
Scale
porro prism and theodolite to 0.1 meter
Used in conjunction with plumb bob for plumb-bob marks and for
Plumb-bob arm assembly
updating for certain vehicle applications.
Change 2
3-11
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