NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: leap seconds a navigational hazard, says expert
From: Richard M Pisko
Date: 2003 Aug 9, 23:33 -0600
From: Richard M Pisko
Date: 2003 Aug 9, 23:33 -0600
On Sat, 9 Aug 2003 13:37:34 -0700, Brooke Clarke wrote: >I made one of these by placing a metal plate at the lower end of a South >facing skylight and using a 3x5 card with a number of concentric >ellipses and a small hole at their center. I just tracked the Sun's >image with the card and at exactly noon stopped and drive a small brad >nail into the hardwood floor. After many years there would be more than >one nail for the same date because as we go through the 4 years of the >leap year cycle the timing is a little different. > Thank you. Got it now ... not all the details, but the general idea ... and will visit your referenced sites. I read too much into your comment, and was thinking of 15 second accuracy at any daylight hour. A bit difficult, I thought. :-) Did you sand the (copper or steel?) brads flush? -- Richard ...
