NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Norman Baatz
Date: 2025 May 1, 01:51 -0700
It looks like a linearly increasing factor (starting from 1.000) for correcting the altitudes is a "best fit" for my sightings so far, and that translates to a quadratic function for the arc correction. You see it in the image below, and I also took the liberty of creating a best fit quadratic function through the arc correction values that Greg has shown. Re-plotting my LOP's with this function looks similar to what I showed last, and I'll still be validating or adjusting the slope for the change in factor.
Lawrie, thanks. I have no way to compare and I'm also standing on solid ground for my sightings :) And for sure a plastic sextant is very susceptible to deformation; I have to watch out how I'm holding it, especially when using both hands. Even looking intently through the eyepiece seems to bend it :)
Norman
