NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Hardly ever get an LOP than 20 NM - why?
From: Igor S.
Date: 2020 Jan 17, 00:56 -0800
From: Igor S.
Date: 2020 Jan 17, 00:56 -0800
I rarely come up with an LOP under 20NM
Laurence, do you mean intercept (Ho - Hc) under 20NM ?
I am also using ASTRAIIIB and a mirror artificial horizon. As an assumed position (AP) I am using my GPS coordinates and vast majority of my intercepts are less than1NM (it depends on how precise I can level my mirror). If your AP is different then of course you can get a much bigger intercept but resulting LOP will be the same!
To check your sextant measurements instantly you can use the app of Frank Reed:
http://fer3.com/arc/m2.aspx/
Concerning a technical side of ASTRAIIIB I found a noticeable asymmetry in index correction (I.C.) see my older post:
http://fer3.com/arc/m2.aspx/Asymmetry-ic-IgorS.-jun-2019-g45169
http://fer3.com/arc/m2.aspx/Side-error-asymmetry-IgorS.-aug-2019-g45651
you can check it as well
kind regards,
Igor
