A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Tony Oz
Date: 2016 Nov 11, 10:58 -0800
Some nit-picking on the "Slide Rule Back Side": a typo there: "- If H < 90° then then use...".
Regarding the decimal dot for 1.1~1.9 range: I'm searching and reading all the ancient (1950~1980) books on the art of slide rules (with lots of pictures). Yes, there were no such thing (the dot I was talking about) on any of slide rules, so the rule with the dot is a one off example.