A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Robert Bernecky
Date: 2016 Jun 17, 11:08 -0700
By "plane geometry" I assume you mean you are finding the distance between the assumed position and the actual position. This distance is not the intercept. The intercept is the shortest distance from the assumed position in the *direction of the azimuth* of the body to a "line of position". You can be anywhere on the line of position (within reason).