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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Understanding a 1902 Sumner
From: John D. Howard
Date: 2017 Jan 21, 12:00 -0800
From: John D. Howard
Date: 2017 Jan 21, 12:00 -0800
Frank,
Thank you for the explanition.
One thing still bothers me so hopefully you can clairfy it. It seems you are saying that I could use the data from a 1902 almanac to reduce a sight and the lat/long would match up to GPS if the gravity deflection from the vertical was zero?
I know that maps do not match up well over the years but do the Lat & Long?
Thanks for your help.
John H.
