A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David C
Date: 2017 Aug 9, 13:36 -0700
You might want to give a slide rule a try for solving azimuth. I like slide rules that have the S scale just above the C scale on the slide (see Post Versalog 1460). First solve for prime vertical
I am of a generation who was provided with a slide rule when starting work. I still have it. Several months ago I got it out and tried working a sight. I had four problems:
- The trig scales are decimal degrees.
- My aging eyes found reading the scales difficult.
- The slider is sticky. Following instructions I purchased some vaseline but that did not solve the problem.
- I had forgotton how to use it.
I also decided to make a flat Bygrave. Unfortunately my local stationary shop had just rearranged its stock and I could not find any projector film.
In the meantime I am happily working sights by short methods.
The great thing about astro is it has many facets. When I reach a road block with short methods (or get fed up) I can switch to something else (-;
Tio change the subject slightly - given that the Hydrographic Office had an excellent (in my opinion) set of tables in Dreisonstok why did they put resources into a competing set of tables (Ageton)?