Radar and ARPA Manual

RADAR PLOTTING

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Figure 7.5 Plots where no triangle appears

7.3 The true plot

The data given in Example 7.1 in Section 7.2.2 can be

plotted on graph paper or on the chart as a 'true plot'

(Figure 7.6).

In this case, own ship's course line is laid off on the

plotting sheet and own position marked. From this pos-

ition the bearing and range of the target are laid off.

Own ship's position at, say, 3 minute intervals is then

marked off along the course line. What will be obtained

directly is the target's course and the distance travelled in

the plotting interval but, as already stated, perhaps the

most important single piece of information availabl ...