A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Peter Fogg
Date: 2003 Mar 18, 12:18 +1100
> From: "Royer, Doug"
> They are made of clear plastic,are about 18 - 22 inches long on each > arm.The > arms are connected to and pivoted on a protractor or rose.One finds > terrestrial points,lays one leg over each point and ones position is > somewhere around the pivot. Just trying to think this through, they seem to work like a technique I do know. You take a sheet of clear plastic and on it plot the 3 angles or bearings to a common point. Then fit that over the chart so the lines intersect the 3 features and the point is the fix. Still grappling with the 'circular LOP'. How do you know where to describe the circle? The distance off is usually what you are trying to establish.