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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Pike
Date: 2016 Jan 6, 12:38 -0800
Bob Goethe sent some photos http://fer3.com/arc/m2.aspx/Traditional-navigation-slide-rule-Goethe-jan-2016-g34055
That’s a mighty slide rule Bob. For one who only ever managed to just scrape through in higher Maths, please confirm what all the scales are. Starting from the backside from bottom up my guesses are:
LL2 = e superscript 0.1x
LL3 = e superscript x
C&D = x
C1 = 1/x
C1F = just a guess 1/pi x
CF = just a guess pi x
LL1 = just a guess e superscript 0.01x
L = log base10 x
Front side from bottom up
Sh1 = just a guess sinh-1 some scale on there? Small angles
Sh2 = just a guess sinh-1 some scale on there? Larger angles
Th = just a guess tanh-1 some scale on there?
D = x
S = sin-1 x
ST = sin-1 x or Tan-1 x Very small angles
T = tan-1 x
A&B = x squared
LL00 = very much a guess e superscript 0.000x
LL0 = very much a guess e superscript 0.00x
Many thanks. DaveP
