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Advancing LOPs, Continued
Figure 9-14. A fix from several LOPs.
Three lines of position by observation, like those obtained in piloting, do
not always intersect exactly. Quite often a triangle is formed. If one or
more of the LOPs must be advanced, the triangle is likely to be larger.
Frequently, the center of the triangle is assumed to be the fix.
If, however, one or more lines have been advanced, more weight may be
given to a line that has not been advanced, or to a line that the navigator
has more confidence in; for example, favoring a first magnitude star
over a third magnitude star. In figure 9-14, note that the plots are made
from three separate APs, using the same assumed latitude but different
assumed longitudes.
9-30
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