NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sunrise, Sunset, LAN, LMT
From: Frank Reed CT
Date: 2004 Aug 5, 20:46 EDT
From: Frank Reed CT
Date: 2004 Aug 5, 20:46 EDT
Halboth@juno.com wrote:
"How many of you critics have actually tried to obtain Longitude by equal altitudes. As is the case with almost all methods of navigation there are limitations to its use, however, at the right time and place it can be useful"
I agree completely. With a plastic sextant, a cheap clock, and only an analemma (or equivalent) for tables you can celestially navigate your way around the world. And the little issues which affect the accuracy of this method can be dealt with easily if one so desires. Those little issues are not sufficient reasons to pass over an important method of navigation.
By the way, for newcomers to celestial navigation, another textbook worth buying is "Learn to Navigate by the Tutorial System Developed at Harvard" --an ungainly title for an excellent textbook. It includes a brief chapter (it would have to be brief, it's so simple), complete with analemma, on this simple method of finding longitude and latitude using Noon Sun sight series.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
"How many of you critics have actually tried to obtain Longitude by equal altitudes. As is the case with almost all methods of navigation there are limitations to its use, however, at the right time and place it can be useful"
I agree completely. With a plastic sextant, a cheap clock, and only an analemma (or equivalent) for tables you can celestially navigate your way around the world. And the little issues which affect the accuracy of this method can be dealt with easily if one so desires. Those little issues are not sufficient reasons to pass over an important method of navigation.
By the way, for newcomers to celestial navigation, another textbook worth buying is "Learn to Navigate by the Tutorial System Developed at Harvard" --an ungainly title for an excellent textbook. It includes a brief chapter (it would have to be brief, it's so simple), complete with analemma, on this simple method of finding longitude and latitude using Noon Sun sight series.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
