A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Herbert Prinz
Date: 2017 Sep 14, 08:49 -0700
I agree with Alexandre. His answer is very clever, because it depends on the definition of "predictable".
Frank's puzzle raises the question for whom the NA is designed and made. Obviously not for the small boat cruiser, whom it may take two or three years to complete a circumnavigation, but, who also does not need (leap-) second precision. So, what is its declared purpose? This question is my puzzle.