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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Instrument Corrections
From: Fred Hebard
Date: 2003 Mar 7, 21:26 -0500
From: Fred Hebard
Date: 2003 Mar 7, 21:26 -0500
The calibration label on the inside of my Husun sextant box says: The following corrections should be applied: Angle 30d 60d 90d 120d Correction +20" +10" +30" +30" After reading Bowdich and Bauer, I concluded that I should _subtract_, for instance, 30 seconds of arc from a measurements of 90 degrees. But I'm wondering whether I shouldn't be adding 30 seconds of arc rather than subtracting it, for readings of 90 degrees. Any comments would be very much appreciated. Thanks in advance, Fred Hebard
