NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: When even a Davis Mark 3 is too much
From: John D. Howard
Date: 2017 Jan 15, 16:49 -0800
From: John D. Howard
Date: 2017 Jan 15, 16:49 -0800
Brad, you said:
"With all due respect, John, after 30 years if professional leadership in the motion control field, I believe I understand centering error, accuracy and repeatability.
You mentioned some older octants and etc. Please provide proof, wherein the ACCURACY of the device is measured against a standard. The resolution has nothing to do with it. It's the accuracy that is the claim and the accuracy that counts."
The standard is getting to your port. The proof is that for hundred of years sailors used wooden octants to do that. You seem to be saying that a plastic sextant cannot give useful results. I am saying that a wooden octant can be as good as a plastic sextant and can be used for navigation.
Frank had asked the question about a home shop making a pivot and my answer was a ball bearing.
John H.
