A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Alan S
Date: 2015 Aug 30, 13:37 -0700
Might one draw the following analogy or comparison. Think "iron sights" on a rife, I refer to the Redfield or Lyman apature sights, and or the "sight tube" you mention, compared to the telescope on a extant or the telescopic sight on a rifle.