NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: The "Death to the Intercept Method" revisited?
From: Geoffrey Kolbe
Date: 2017 Sep 5, 23:29 -0700
From: Geoffrey Kolbe
Date: 2017 Sep 5, 23:29 -0700
Jing C wrote
"What about movIng the GP of the first body sighted in the direction of course T by distance traveled by the ship? My intuition tells me that is the equivalent of when you move a line of position in a flat plane like with the intercept method....."
No, that is not what happens with the intercept method. You do not "move" the GP when you advance the LOP. That is the mistake that has tripped up several proponents of new mathematical methods before.
In the intercept method, the circle of position is expanded or contracted in concert with the movement of the observer, but the GP remains fixed.
Geoffrey Kolbe
