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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Greg's article on hav-Doniol in "Ocean Navigator"
From: Stan K
Date: 2015 Jun 11, 17:23 -0400
From: Stan K
Date: 2015 Jun 11, 17:23 -0400
On the subject of minor errors, is it just me or is the conversion from Z to Zn in the spreadsheet at fer3.com/arc/img/130405.hav--doniol.pdf incorrect?
-----Original Message-----
From: Greg Rudzinski <NoReply_Rudzinski@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Thu, Jun 11, 2015 4:12 pm
Subject: [NavList] Re: Greg's article on hav-Doniol in "Ocean Navigator"
Attached File:
(Hav-Doniol-Azimuth-Formula.jpg: Open and save)
Attached File:
(ON-Hav-Doniol-Azimuth_.jpg: Open and save)
Attached File:
(Haversine-Doniol-Azimuth.PNG: Open and save)
From: Greg Rudzinski <NoReply_Rudzinski@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Thu, Jun 11, 2015 4:12 pm
Subject: [NavList] Re: Greg's article on hav-Doniol in "Ocean Navigator"
Gary LaPook has informed me that the azimuth example in the ON article is not explained and not needed since there is an azimuth graph. As usual Gary is right. Not only did I fail to explain the redundant azimuth formula but there is an arithmetic issue too :( The haversine Doniol azimuth formula (as arranged by Lars Bergman) is attached below along with corrected arithmetic for the example. Strangely the answer for Z is about the same.
Greg Rudzinski
Attached File:
(Hav-Doniol-Azimuth-Formula.jpg: Open and save)
Attached File:
(ON-Hav-Doniol-Azimuth_.jpg: Open and save)
Attached File:
(Haversine-Doniol-Azimuth.PNG: Open and save)
