A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Carly Butler
Date: 2015 Mar 25, 11:57 +0000
My goodness you guys are good - yes, it is a Davis Mark 3 (my 'training' sextant, well, my only sextant), and it was showing around 3-5' of index error. I did manage to fix it (I think), but I've found that now I've travelled with it from Mexico (where the photo was taken) back to Halifax, I can't get it to zero again. Maybe it got knocked about or warped somehow (I don't have a case for it), or. more probably, I'm just doing something wrong.
Actually, I'm doing a lot wrong, as you'll see in the attached. This is a cyanotype (photo developed using the sun) showing one of my attempts at a position fix. The aim was a project where I took a sun sight every day, and then using the same sun, developed a photo of the chart showing my position. I knew I would be 'off' (even though I wasn't moving), but I was unprepared for how off and how SLOW I was doing the calculations (it was sometimes a race to complete the art/photo portion before the sun went down).
The attached is one that shows me in Louisiana - where I was most definitely not. I was actually in the small Mexican town of Sisal in the Yucatan. But at least I still put myself in the Gulf of Mexico...sort of.
On 24 Mar 2015, at 18:12, "Greg Rudzinski" <NoReply_Rudzinski@fer3.com> wrote