NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Timed Noon sights for position
From: Fred Hebard
Date: 2004 Jan 22, 17:11 -0500
From: Fred Hebard
Date: 2004 Jan 22, 17:11 -0500
Yes, it overcomes most objections, although the procedure is fairly inaccurate, up to about 100 miles, compared to time shots a few hours before and maybe after noon. But Doug is saying that's better than nothing. Also, Doug appears to be using a different procedure in his detailed posting. On Jan 22, 2004, at 4:58 PM, Joel Jacobs wrote: > Let me suggest, that if Doug had the time, he could start taking > sights, say > 5 minutes before Meridian Passage, record his first reading, and if he > wants > a series of readings, until Meridian Passage, record that, and then > preset > his sextant to the first altitude he observed, and take the time when > the > sun reached that altitude on the downside after passage. Averaging > those two > times should allow him to solve for long. > > That's more time than he wanted to allocate to this, but it shouldn't > it > overcome the objections relative to getting long from a noon sight. > > Joel Jacobs > >