NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Materials from Navigation Weekend Talk
From: UNK
Date: 2010 Jun 08, 18:45 +0000
From: UNK
Date: 2010 Jun 08, 18:45 +0000
Aha. We have fallen victim to a wide spread terminological confusion. "Double Altitude Method" is historically the method of determining latitude from two altitude observations of the sun spaced apart by a known time interval. You seem to mean "Method of Equal Altitudes". Nowadays the term is often used for "Method of Combined Altitudes" in general (when exactly two altitude observations are given). I understood it in the latter sense. As far as I can see from R.Stuart's post, there is nothing that prevents his method to be applied to the general case of two different bodies. Herbert James N Wilson wrote: > Herbert: > > Because that's the only time when declination isn't changing.