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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, 14:25 -0800
From: John D. Howard
Date: 2017 Jan 21, 14:25 -0800
David,
My concern about datum was when we check our fix using our GPS. My GPS can be set to many different datums. Just now I changed from WS84 to EUR79 and my backyard changed coordinates - not much but they changed.
I was thinking that the GPS and the almanac should be on the same datum and I do not know what the almanac uses.
John H.
