NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Round-off
From: Jeremy C
Date: 2009 May 17, 17:08 -0700
From: Jeremy C
Date: 2009 May 17, 17:08 -0700
I've never heard of rounding to the nearest whole minute during reduction. That doesn't seem too wise to me. What I was taught from all sources is to carry 1 decimal point at all times (0.1' of arc and 0.1 deg in azimuth). This was for all tabular reduction. When I work with formulae, I am carrying 13 places in my calculator and then round to the nearest 10th when I am finished. Using my tools on paper charts/plotting sheets for Celnav, I am usually interpolating by eye, divisions less than 1 minute of lat or long and within 1 degree of azimuth. Better precision in the reduction process is generally wasted during the plotting process in practice. If you are using computers to plot, its a whole other story in both reduction and plotting precision. Jeremy --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
