NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Calibrating a sextant scale
From: Fred Hebard
Date: 2007 Dec 3, 10:44 -0500
From: Fred Hebard
Date: 2007 Dec 3, 10:44 -0500
Just to reiterate, I think, these posts have to be three miles from the sextant or you account for parallax? Fred On Dec 2, 2007, at 11:30 PM, frankreed@HistoricalAtlas.net wrote: > I've been thinking of other possibilities. Bays and sounds are the > best bet. > I wonder if there's a good spot in San Francisco Bay. I've also > wondered > about the possibility of observing from the top of a small hill in > relatively flat country, but if the objects are out of the horizon > by half a > degree or more, the error is too large. I did come up with another > possibility: how about a nice dry lake bed? There are plenty that > are flat > as a pancake for miles. Set up posts around the radius of a circle at > roughly equal angles, and voila, a sextant calibration observatory! > Do you > know if one would need special permission to go out onto the flats > west of > Great Salt Lake and drive posts into the ground? Or any of the So Cal > lakebeds? --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---