NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Gary LaPook
Date: 2010 Feb 16, 12:56 -0800
That's may be true in many cases but not in all cases. On a ship traveling at twelve knots, if it takes just four minutes between the first and last sight then the first LOP needs to be advanced two NM, not a trivial amount and a number that exceeds the likely errors in the sights.
I should also point out that the mathematical method of advancing an LOP is not limited to just the short period of time needed for a round of sights but is also a very accurate way to advance an LOP for the usual running fix. It produces the same advanced LOP as the more common plotting method.
gl
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