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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: recommendation for slide rule ?
From: Gary LaPook
Date: 2009 May 21, 15:20 -0700
From: Gary LaPook
Date: 2009 May 21, 15:20 -0700
I can't think of any advantage to having S and T scale on the body in addition on the slide for the normal method of calculating Hc and Az. The pictures I found on line appears to show that the rules lack the ST scale so don't cover small angles which could cause problems.. gl On May 21, 6:28�am,wrote: > Gary, > > British brand UNIQUE offered several sliderules of cheap construction, but > interesting scale layouts. Among them was so called "Unqiue navigational". In > addition to normal log scales it featured sine and tangent scales located both > on slide rule body AND slide. Allegedly this would make certain trig > calculations easy. > > Whould it be more convenient to calculate a celestial fix with this layout? If not, what other navigational calculations would be simplified? > > Unique Navigational may be seen on various places on the internet, for example > here:http://www.mathsinstruments.me.uk/page14.html --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---