NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant accuracy with short distance to horizon
From: Rodney Myrvaagnes
Date: 2001 Jun 26, 7:48 AM
From: Rodney Myrvaagnes
Date: 2001 Jun 26, 7:48 AM
On Mon, 25 Jun 2001 15:46:33 -0700, Dan Hogan wrote: >> >> That's interesting. But surely one must make an allowance for the fact >> that the fence is not at the same altitude as the horizon. > >I can't remember that much about the post, but I THINK he had some kind of HE >correction for his eye above the fence line. > He would need extremely accurate survey data if there was any meaning to be had. He would have to know the relative height of the fence and his eye, as well as the distance to the fence. If he already knew the exact location, and took sights over a long period of time, he could eventually derive the HE. Rodney Myrvaagnes J36 Gjoa rodneym@attglobal.net Senior Editor Electronic Products "Fireman saves pregnant squirrel" -- Arizona Republic, Dec. 14, 2000
