TM 5-6675-317-14
3-3. TECHNICAL PRINCIPLES OF OPERATION.
3-3.1 General.
The operator views the map or chart through the optical system.
Stereo-pair photographs appear superimposed on the map. The optical controls ro-
tate, magnify and stretch the image to conform to the map or chart, permitting the
operator to annotate, correct or change the map.
The operator controls illumination
of the photographs and map.
3-4