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Advancing LOPs
Advancing
LOPs
Several methods may be used to advance a LOP. The most common
method consists simply of advancing the AP in the direction of and for
the distance of the run, as shown in figure 9-13, and drawing the new
LOP.
Figure 9-13 illustrates a situation where the AP was advanced parallel to
the course line for the distance run, and a new LOP was plotted from its
new position. The new LOP was necessary because the same AP would
have produced an LOP that would have intersected the course line
beyond the limits of the chart. In this illustrative case, it is unnecessary
to draw the first dashed construction on the chart.
The manner of advancing LOP from sights of the Moon, Venus, and
Sirius (previously illustrated) to obtain an 1815 fix is seen in figure
9-14.
9-29
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