NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Making an impact with hav-Doniol
From: Peter Hakel
Date: 2015 Jun 27, 15:41 +0000
From: Greg Rudzinski <NoReply_Rudzinski@navlist.net>
To: pmh099@yahoo.com
Sent: Friday, June 26, 2015 8:01 PM
Subject: [NavList] Re: Making an impact with hav-Doniol
From: Peter Hakel
Date: 2015 Jun 27, 15:41 +0000
Greg,
The following example should be helpful:
https://navigationspreadsheets.wordpress.com/2014/07/28/two-body-fix-santa-barbara-16-july-2011/
I attach the intercept calculations and the subsequent plot using Kermit’s scale in which 1 centimeter represents 1 nautical mile. Both LOPs are sufficiently oblique to the cardinal directions to be plotted using their intersections with the AP parallel and meridian (calculated in the bottom part of the intercept spreadsheet and shown as a pair of dots along each LOP).
Peter Hakel
P.S. The latitude of the plotted and directly computed fix, as well as the morning intercept distance, differ by about 0.1’ due to rounding in the AP that I did today versus what I used for that blog entry. I only mention this for completeness, as this detail is too small to be relevant in this context.
The following example should be helpful:
https://navigationspreadsheets.wordpress.com/2014/07/28/two-body-fix-santa-barbara-16-july-2011/
I attach the intercept calculations and the subsequent plot using Kermit’s scale in which 1 centimeter represents 1 nautical mile. Both LOPs are sufficiently oblique to the cardinal directions to be plotted using their intersections with the AP parallel and meridian (calculated in the bottom part of the intercept spreadsheet and shown as a pair of dots along each LOP).
Peter Hakel
P.S. The latitude of the plotted and directly computed fix, as well as the morning intercept distance, differ by about 0.1’ due to rounding in the AP that I did today versus what I used for that blog entry. I only mention this for completeness, as this detail is too small to be relevant in this context.
From: Greg Rudzinski <NoReply_Rudzinski@navlist.net>
To: pmh099@yahoo.com
Sent: Friday, June 26, 2015 8:01 PM
Subject: [NavList] Re: Making an impact with hav-Doniol
Paul,
If you post a CN fix plot with a pair of crossing LOPs along with the data from your favorite sight reduction method then I'll jot in the Hav Doniol reduction and plot on top of it to compare.
Greg Rudzinski
From: Paul Dolkas
Date: 2015 Jun 26, 17:13 -0700I think what would help with this method is if you were to take the reader through, step by step, how you get your position - starting with the observed altitude of (say) the sun at a particular time & date, and taking it all the way through where you plot the LOP.Anyway, it would surely help folks like me.Paul Dolkas
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