A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Ageton Classic SR Table PDF
From: Greg Rudzinski
Date: 2015 Oct 30, 16:39 -0700
The Ageton Classic table that is provided at the beginning of this thread has Ageton AB log values sandwitced by natural sin cos values. This makes 4 place decimal multipling possible by addition.
(.3396)(.8042) = .2731
nat .3396 log 46908
nat .8042 + log 9463
log 56371 = nat .2731
From: Gary LaPook
Date: 2015 Oct 30, 22:42 +0000
OK tell me how your do that.
From: Hewitt Schlereth <NoReply_Schlereth@fer3.com>
Sent: Friday, October 30, 2015 11:02 AM
Subject: [NavList] Re: Ageton Classic SR Table PDF
Excellent, Greg. Had not thought of that. Another plus for the Ageton logarithms.
The Ageton Classic table also does a great job of multiplying two 4 place decimal numbers such as the multiplication step in the Hav Doniol reduction.
A double stack of AB values followed by a lookup will get the P value for the Hav Doniol reduction in half the time of a four place longhand multiplication with less chance of error.
From: Hewitt Schlereth
Date: 2015 Oct 27, 19:18 -0700
Greg, this is really nice. Now we have two super-compact Sight Reduction tables:
Doniol for those who can handle the multiplication of a stack of two five digit numbers.
Ageton Classic for those like me who find it easier to add a stack of two or three logarithms.
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