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: Dan Hogan
Date: 2000 Jul 25, 09:20 EDT
From: Dan Hogan
Date: 2000 Jul 25, 09:20 EDT
On 25 Jul 2000, at 9:29, 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?? Since the Sextant error will be what ever the Sextant has, I use an old adage I was taught. "On the arc OFF, off the arc ON" If the error is on the arc Subtract it, if the error is off the arc ADD it. Dan Hogan dhhogan@XXX.XXX NAV-L Web Page: http://nav.cnchost.com
