ATP-3-09-02 Field Artillery Survey Download
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Chapter 7 7-8 ATP 3-09.02 16 February 2016 Figure 7-4. Correction nomograph 7-26. The nomograph consists of three columns. The left column is graduated in meters from 100 to 1,000. It represents the value of the length of the line (D) from the flank station to the plotted line that represents the azimuth to the sun from the master station. The center column is graduated in seconds and mils from 0.5" to 70" and from 0.003 mil to 0.34 mil and is the correction (C). The right column is graduated in degrees and mils from 10° to 65° and from 180 mils to 1,150 mils. It represents the vertical angle to the celestial body at the master station (H). Before C can be determined, the values of D and H must be known and used as arguments in the nomograph. When the distance exceeds 1,000 meters, it must be divided by 10, 100, or 1,000 to obtain a value between 100 and 1,000. In such cases, the chart value of C must be multiplied by the same value by which the distance was divided. The value H must be between 180 and