A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Mike Freeman
Date: 2017 Mar 17, 09:53 -0700
I know what they are and can use them but if someone asked me to give a definition of the term sight reduction I would be beat. Cannot help thinking it is to do with bringing the GP's of the HB's close to our DR therefore making a reduction of the size of the chart required to make a plot. From about a mile square to the size of a plotting sheet.