NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Navy MK 5 Octant Using Natural Horizon
From: Alexandre Eremenko
Date: 2012 May 1, 02:15 -0400
From: Alexandre Eremenko
Date: 2012 May 1, 02:15 -0400
Greg, Thanks for your explanation. I did not realize that this was the bubble octant:-) (But these are excellent results for a bubble octant! I have never heard of the 0.1' accuracy obtained with a bubble octant, even if this is an average of 30) > There is no way to get results like I did with a > bubble horizon even on my luckiest day ;-) I thought tat there is no way to obtain the results you are talking about with a bubble octant at all:-) But I have never tried my bubble octant with the real horizon. > I was happy to get near marine sextant performance > which means that this particular octant with horizon > prism is good enough to substitute for a marine sextant > aboard ship or small craft. I don't see a reason to substitute a normal sextant with a bubble octant if the real horizon is available, except that a bubble octant is usually cheaper. But the performance of your bubble octant seems to be quite exceptional. Alex.
