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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Revised Nautical Almanac Concise Sight Reduction Tables
From: Hanno Ix
Date: 2015 Feb 21, 14:42 -0800
How long did each reduction take you?
Are you familiar with using NASR,? If so, how long would that
take you?
H
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PS: I believe you are interested in circular slide rules.
Any thoughts about the designs I recently proposed?
From: Hanno Ix
Date: 2015 Feb 21, 14:42 -0800
Hi, Greg -
RIC^3!How long did each reduction take you?
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On Sat, Feb 21, 2015 at 12:06 PM, Greg Rudzinski <NoReply_Rudzinski@fer3.com> wrote:
Compared are four short table reductions all performed on the same side of an index card. Weem's, Dreisonstok, Hughes, and Doniol. All are a pleasure to use without the need for a form. Weem's, Dreisonstok, and Hughes use an assumed position and log tables. Doniol uses a DR position and a natural haversine table. Doniol does involve a bit more math but makes up for it by using the DR position with a complete table set that fits in the wallet (try putting 229 in your wallet ;-).
Greg Rudzinski
Attached File:
(Short-Tables.jpg: Open and save)
Attached File:
(Short-Tables-Example.jpg: Open and save)
