NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: minus index corr better than plus
From: Barry Hudson
Date: 2000 Jul 25, 14:16 EDT
From: Barry Hudson
Date: 2000 Jul 25, 14:16 EDT
You don't have to live with 2' off the arc, simply remove it. Barrie Hudson Russell Sher wrote: > How's this reasoning: > > An 'on the arc' (negative) correction is easier to read since it is read > straight off the micrometer drum. An 'off the arc' error would be calculated > by reading the drum and taking the 60' complement - for example: An error of > 2' on the arc will be read as 2' when the instrument is being checked and > the error has been noted. An error of 2' off the arc will be 58' ( > equivalent to -2'). > correct?? > > Russell > > -----Original Message----- > From: Paul Hirose [mailto:71202.2014@XXX.XXX] > Sent: Tuesday, July 25, 2000 9:16 AM > To: NAVIGATION-L@XXX.XXX > Subject: minus index corr better than plus > > I've never seen this discussed anywhere, but I can think of two > reasons to prefer a negative sextant index correction rather than a > positive IC. Can anyone figure out what those reasons might be?
