NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Peter Hakel
Date: 2011 Oct 27, 00:35 -0700
And here is the corresponding plot. The AP for all LOPs was N35 W119. As we discussed in the past this allows the plotting of LOPs without the use of the azimuth line and the intercept distance. This can help declutter the plotting sheet, especially in cases like these with so many LOPs.
For example, the Procyon LOP runs in directions 051 and 231, and crosses the AP's meridian 22nm north of the AP. With this information each LOP can be plotted easily with parallel rulers first oriented following the compass rose and then shifted to produce the correct intersection point on the chart.
If for some reason you are using a chart in which the latitude and longitude scales are not in the correct proportion (and hence angles are no longer usable), LOPs can still be plotted based on its two calculated intersection points of the AP's parallel and meridian. If the LOP runs close to N/S or E/W, one of these intersections becomes ill-defined but even then the LOP can still be plotted.
Peter Hakel
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