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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Is 20" arc error compatible with "free of error for practical use"?
From: David Pike
Date: 2024 Aug 28, 13:27 -0700
From: David Pike
Date: 2024 Aug 28, 13:27 -0700
Re Arc error: By the end of my four miles constitutional this evening, I'd thought of a better way of putting it.
30 seconds of arc on the celestial sphere is equivalent to 0.5nm on the corresponding great circle on Earth. DaveP
