NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Gary LaPook
Date: 2013 Mar 21, 10:37 -0700
| John, another way to describe your method is that you throw out the first LOP and keep only the first EP. Then you start a DR plot from the EP and then establish a second EP where the DR plot hits the second LOP. I have a problem with that. Traditionally you only start a new DR plot from a fix, not from a position of lesser, and unknown, accuracy. Although the first EP may be the most accurate estimate of your position at that time there is no reason to believe that it has the accuracy of a fix, and any inaccuracy or uncertainty in the first EP is carried forward with the DR plot, and degrading further due to normal uncertainty in DR, 10% of the distance covered is the accepted uncertainty in flight navigation though it is probably less for surface navigation. So I'll stick with the traditional method of working a running fix. gl --- On Wed, 3/20/13, John Karl <jhkarl@att.net> wrote:
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