NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Why Not To Teach Running Fixes
From: John Karl
Date: 2009 Dec 13, 10:25 -0600
From: John Karl
Date: 2009 Dec 13, 10:25 -0600
Ah, the traditions of the sea. For all the talk on how to teach running fixes, here's my 2 cents worth on why to not teach them at all -- they make no sense whatsoever. The figure below shows that they operate under extremely ridiculous assumptions: They assume that the estimated DR track perpendicular to LOP1 is completely accurate and that the DR component parallel to LOP1 is completely without value. Can anyone on the List justify these two assumptions?? I recommend using the Estimated Position (EP) concept shown in the figure. It fully honors the new LOP2 while retaining the information in the DR that is not contradicted by LOP2. JK -- NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList+@fer3.com