NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Visit to Freiberg
From: Fred Hebard
Date: 2005 May 23, 17:08 -0400
From: Fred Hebard
Date: 2005 May 23, 17:08 -0400
Alex, The sharp changes, such as between 20 and 40 degrees are the wandering to which I referred in an earlier post. For sextants calibrated every 30 degrees, many of these changes would be missed. For instance, your sextant would appear to have a slightly positive bias if calibrated every 30 degrees. For more inaccurate sextants, such as many of the wartime Husuns, the calibrations can change just as abruptly, but the magnitude of the swings is almost 10 times greater. Fred On May 23, 2005, at 3:57 PM, Alexandre Eremenko wrote: > Bill, > The table of correction is > 0 10 20 30 40 50 60 70 80 90 100 110 120 > 0 -4 -4 10 6 -1 4 5 -5 4 4 3 14 > The first line in degrees, the second one in seconds. > When rounde to tenths of minutes > it never exceeds 0.1' except 2 times > when it is roughly 0.2'
