A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2017 Aug 17, 21:29 -0700
The Lutz 252 duplex 10" slide rule does a great job on many navigation problems. I very much like the scale arrangements which makes for quick work on azimuth, amplitude, prime vertical, ex-meridian, and even sight reduction by Bygrave formula. The slides T1, T2. and S scales above the D scale are what gets it done when using the Bygrave method (see attached example). Precision is acceptable.