ATP-3-09-02 Field Artillery Survey Download
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Angle Determination 16 February 2016 ATP 3-09.02 5-15 and divide by 2, the resulting mean reading will be recorded in the mean column in the R row. Mean the Direct and Reverse readings to the Rear Station. Make the reverse reading look like the forward reading by adding or subtracting 3200 add the 2 results together and divide by 2. The resulting mean reading will be recorded in the mean column in the R row (see figure 5-23). Figure 5-23. Mean horizontal angle TURNING MULTIPLE HORIZONTAL ANGLES 5-31. Prior to beginning to turn multiple horizontal angles the initial circle setting of 0001.0 must be obtained as described in paragraph 5-24 and figure 5-18 (on page 5-12). 5-32. While ensuring the telescope is in the direct mode with the eyepiece on the left side achieve autoreflection on the porro prism of the IPADS (see Figure 5-19).The IPADS is the rear station. Record the initial setting of 0001.0 in the Recorder’s Notebook under the Horizontal Angle column, in the IPADS D direct row. 5-33. Press Hold to release the scale and rotate the instrument in a clockwise direction and sight in on the lowest visible point of the forward station. Read the Horizontal Angle and record in the Recorder’s Notebook in the Horizontal Angle column of the 1 st Forward Station D row (see figure 5-24). Figure 5-24. Direct reading forward station 1