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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Gunther Rules for Navigation
From: Ed Popko
Date: 2017 Apr 22, 04:26 -0700
From: Ed Popko
Date: 2017 Apr 22, 04:26 -0700
While following up Brad's suggestion to decode Gunter Rule scales with early 19th century Bowditch references, I find Bowditch mentions "Rule of Three".
Stan Klein found one definition on the internet - "a method of finding a number in the same ratio to a given number as exists between two other given numbers". Although mentioned in various Bowdith editions, it's never explained what the rule is or how it's used. It seems to be a proportion, perhaps a way of scaling geometric relationships.
Does anyone know?
Popko
