TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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LEVEL TRAVEL AND LIFT INSPECTION NOTE • LEVEL TRAVEL Line of sight shall not deviate in elevation from a horizontal target line by more than + 1.0 mil (total excursion of 2 mils) when head is rotated through at least 2 full revolutions of travel. • LIFT Displacement of the horizontal line of sight, due to reversing direction of head rotation, shall not exceed 0.5 mil while observing reticle. 1 Set azimuth ring (1) to "0" coincidence on azimuth testing fixture (2). 2-74