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Re: Loss of accuracy using Sun over Sun with a mercury artificial horizon?
From: Bob Goethe
Date: 2016 Jul 18, 18:20 -0700
From: Bob Goethe
Date: 2016 Jul 18, 18:20 -0700
16 of the sights were Away which suggests to me a systematic error. The IE is 0'. One thought I had was that if the IE was 1' off there would be an even towards/away distribution. However I had carefully checked IE using the two limb method.
I have concluded that I am not bringing the sun down far enough before reading the sextant.<
I resonate with this, David. I found that over a span of dozens of sights, I averaged 1 nm toward in my lines of position. I eventually decided the issue was with me rather than anything else. I solved this by adding 1 nm away as a "personal error."
Bob
