NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Summer Solstice
From: Stan K
Date: 2016 Dec 23, 09:38 -0500
From: Stan K
Date: 2016 Dec 23, 09:38 -0500
FYI, and FWIW, the United States Power Squadrons favors "limb touching". From the artificial horizon section of an old Junior Navigation student manual: "Your sun and moon sights will be more accurate if you bring the limbs into tangency rather than superimposing the images."
The fact that John Karl doesn't mention the "limb touching" method surprises me, and it is something I should have picked up after reading the first printing of Celestial Navigation in the GPS Age.
Stan
-----Original Message-----
From: Paul Werner <NoReply_Werner@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Fri, Dec 23, 2016 9:09 am
Subject: [NavList] Re: Summer Solstice
From: Paul Werner <NoReply_Werner@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Fri, Dec 23, 2016 9:09 am
Subject: [NavList] Re: Summer Solstice
David
You haven’t missed anything. But I did. I use “centre coincidence ” when taking AH sun sights and had forgotten the other possibility, “limb touching”, though I now remember having read about it. I don’t know which to prefer. John Karl (Celestial Navigation in the GPS age) describes only the first method. Bowditch, 1958 and 1977, both.
Thanks to Brad and Stan for clarifying messages.
Paul Werner
