NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Navy MK 5 Octant Using Natural Horizon
From: Alexandre Eremenko
Date: 2012 May 1, 13:43 -0400
From: Alexandre Eremenko
Date: 2012 May 1, 13:43 -0400
Greg, I am still somewhat puzzled how could you obtain 0.1' error from an octant whose scale is reading 2'. May I ask you few more questions about the procedure: a) what do you exactly mean by "spread"? The difference between two extremes? Or the standard deviation (=sqrt of the average of the squares of errors)? b) to what precision do you interpolate when you read the scale? I have not seen the scale but depending on the size of divisions one can interpolate such scale from 0.2' to 1'. What was exactly your procedure: how many digits after the dot your row data have? If your spread is the difference of two extremes then I do not see how could you possibly obtain such a numbers as 2.1' or 2.7' It is also hard to imagine that you can interpolate by eye to 1/20-s part of the scale division. Or perhaps you will care to type your raw data? Alex.