ATP-3-09-02 Field Artillery Survey Download
Page 72 of 168
Chapter 5 5-14 ATP 3-09.02 16 February 2016 5-28. Plunge the telescope to the reverse mode and ensure that the eyepiece is on the right side of the instrument. Sight in on the forward station to the lowest visible point. Read the reverse horizontal angle to the forward station and record in the recorder’s notebook in the horizontal angle column R row (see figure 5-21). Figure 5-21. Forward station reverse horizontal angle reading 5-29. Turn the telescope to the rear station and achieve autoreflection. Read the reverse horizontal angle to the rear station and record in the recorder’s notebook in the horizontal angle column of the R row (see figure 5-22). Figure 5-22. Rear station reverse horizontal angle reading 5-30. The next step is to mean the horizontal readings and achieve a mean horizontal angle. Make the reverse reading look like the forward reading by adding or subtracting 3200. Add the two results together