A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Brad Morris
Date: 2017 Dec 1, 22:51 -0500
573/10 is another ratio (57.295779513082....) 573mm long string 10mm=1°
works for any unit. But metric is simplest and 5mm square or for tech drawing 1mm is common linespacing on paper.
trisectipn and quintsection are pains though, bane of instrumentmakers throuh ages