How to use the Plotting Board

HOW

USE

THE

PLOTTING

BOARD

The plotting board is used to plot the positions of the mortars, observation points, and targets

so you can determine the directions and distances between these points.

NOTE

Use the center (pivot point) of the plotting board as either the weapon position

o r the observation point.

To plot a point with a given azimuth and distance from another, proceed as follows:

1 . Use the pivot point as one point.

2. Rotate the azimuth disk (1) on base grid (2) until the stated azimuth is indicated over the

index mark (3).

3. Using the range scale (4) measure the stated distance from the pivot point toward the top

of the plotting board and place a dot.

NOTE

In plotting, read right for azimuth and left for deflection.

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