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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Question Re: Position by Calculation
From: Gary LaPook
Date: 2014 Jan 7, 14:16 -0800
From: Gary LaPook
Date: 2014 Jan 7, 14:16 -0800
Also see my walk through of the Weems computation that I posted before at:
http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6745
gl
From: Gary LaPook <garylapook@pacbell.net>
To: garylapook@pacbell.net
Sent: Tuesday, January 7, 2014 2:03 PM
Subject: [NavList] Re: Question Re: Position by Calculation
Oh, I don't know, just compare the instructions that I have attached. Using Weems Line of Position Book there are only three steps entering the tables to compute Hc, steps 4, 5 & 6. Compare those three simple steps with the verbose instructions for the Concise Tables needed to accomplish the same result.
gl
From: Geoffrey Kolbe <geoffreykolbe---.com>
To: garylapook---.net
Sent: Tuesday, January 7, 2014 10:42 AM
Subject: [NavList] Re: Question Re: Position by Calculation
I would be interested if you would expound your objections to this method.
Geoffrey
http://fer3.com/arc/m2.aspx/Fw-Chichesters-Calculations-SineCosinemethod-LaPook-dec-2008-g6745
gl
From: Gary LaPook <garylapook@pacbell.net>
To: garylapook@pacbell.net
Sent: Tuesday, January 7, 2014 2:03 PM
Subject: [NavList] Re: Question Re: Position by Calculation
Oh, I don't know, just compare the instructions that I have attached. Using Weems Line of Position Book there are only three steps entering the tables to compute Hc, steps 4, 5 & 6. Compare those three simple steps with the verbose instructions for the Concise Tables needed to accomplish the same result.
gl
From: Geoffrey Kolbe <geoffreykolbe---.com>
To: garylapook---.net
Sent: Tuesday, January 7, 2014 10:42 AM
Subject: [NavList] Re: Question Re: Position by Calculation
On 07/01/2014 18:07, Gary LaPook wrote:
Gary, you seem to have compared every sight reduction except the Concise table in the NA....
May I suggest that you use any table other than the Concise table in the NA? The other tables are easier to use and less likely to have some computation error creep in. Since you like the thin, LTM, try the also thin trig based tables such as HO 208 or Weem's Line of Position Book. You can check out these different methods of computation for yourself at the comparison of them that I posted here:
http://fer3.com/arc/m2.aspx/Comparison-tabular-sight-reduction-methods-LaPook-jun-2011-g16648
http://fer3.com/arc/m2.aspx/Comparison-tabular-sight-reduction-methods-LaPook-jun-2011-g16653
I would be interested if you would expound your objections to this method.
Geoffrey
-- Dr Geoffrey Kolbe, Riccarton Farm, Newcastleton, TD9 0SN Tel: 013873 76715 Mob: 07811 154621
: http://fer3.com/arc/m2.aspx?i=126215
Attached File:
(img/126217.weems.jpg: Open and save)
Attached File:
(img/126217.concise 1.jpg: Open and save)
Attached File:
(img/126217.concise 2.jpg: Open and save)
(img/126217.weems.jpg: Open and save)
Attached File:
(img/126217.concise 1.jpg: Open and save)
Attached File:
(img/126217.concise 2.jpg: Open and save)
: http://fer3.com/arc/m2.aspx?i=126217
