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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Haversines with Logarithms
From: Brian Walton
Date: 2020 Oct 16, 00:58 -0700
From: Brian Walton
Date: 2020 Oct 16, 00:58 -0700
I currently have charge of a 68’ traditional motor vessel. I have in hand, a copy of Inman’s Nautical Tables, 1947 version, first published in 1821. My copy contains a reviser’s preface which describes a revision made by Rev Hall, in 1910. This revision note, also contained in my copy, gives the all-haversine formulae for solving spherical triangles, and layout and examples of their use.
My copy contains combined tables for natural and log haversines, which deliver the answer in Right Ascension, for those using almanacs in that form.
Brian Walton
