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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Art and Navigation
From: Carly Butler
Date: 2015 Mar 29, 20:13 +0100
From: Carly Butler
Date: 2015 Mar 29, 20:13 +0100
Oh boy - ok, as scary/embarrassing as that idea is Greg, I will dig out my calculations next week and post for you to check (laugh at). : )
On 26 Mar 2015, at 18:28, "Greg Rudzinski" <NoReply_Rudzinski@fer3.com> wrote
Tom,
I agree that trying to keep a sextant's index error exactly at zero is futile but this should not be an excuse for never adjusting the horizon mirror. Carly's Mark 3 without a case will be very demanding on index error stability. I will suggest a plastic food container fitted with customized foam as something to try.
Carly,
If you post all your sight reduction data (a picture of working notes should be good enough) then we can check things out.
Greg Rudzinski
From: Tom Sult
Date: 2015 Mar 25, 11:15 -0700
Carly
The goal is not to zero your sextant, but to know the error. I like my sextant to have several min of error ON the arc. Trying to be exactly zero is hard and rarely lasts. Testing error before a round of sights then adding or subtracting it is more practical.
Tom Sult, MD
Tom Sult, MD
Author: JUST BE WELL
justbewell.info
