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USER MANUAL
B. When the Horizontal View Angle is bigger than the horizontal scale range (-50~+50 mils), a
vertical line splits(for example: mast, chimney etc.) on the object can be selected to make the
necessary estimated measurements in a step by step fashion. The sum of the value from each
step is used to obtain the measured value. As shown in Figure 6, the azimuth of target (cruiser) is
130 mils (60+70=130).
2) How to Measure the Vertical View Angle
Upper and lower angle means the angel included between any two targets (or two ends of the
target) against the vertical line on the reticle.
A. Vertical View Angle measurement is similar to measuring the Horizontal View Angle. When
the Vertical View Angle measurement is small, aim the cross center of reticle at lower part of the
object, read the scale value at the top of the object. If the target vertical angle is a little bigger, you
can read the upper scale and the lower scale. As shown in Figure 7, the upper line is 35 mils, and
the lower line is 40 mils, the total vertical angle is 75 mils.
B. When the Vertical View Angle is larger than the vertical scale range (-50 to +50 mils), it can be
measured in steps and the angle can be obtained by summing up the value of each step. (The
process will be similar to the measurements as mentioned above as horizontal view angle.)
FIGURE 6. MEASURING OF BIG VIEW ANGLE
FIGURE 7. VERTICAL VIEW ANGLE MEASURING
