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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2016 Aug 16, 13:41 -0700
Michael,
The 6 page Ageton Classic table also doubles as a log table for solving the Hav Doniol multiplication step. Carrying a 5 page natural haversine table along with the 6 page Ageton Classic table gives the CN navigator 3 different ways to perform 1' precision sight reduction from the DR position. The 11 pages total fits easy into the nautical almanac and can be used as a daily page book mark.
Greg Rudzinski
From: Michael Bradley
Date: 2016 Aug 15, 15:37 -0700Thankyou Andrew
... for the Graphical Logarithmic Tables references
... those who use the Haversine/Doniol sight reduction method could use a Log/Antilog graphical table to eliminate its single 'troublesome' multiplication step
... the only one of your references I could find on ABE Books was the Lacroix and Ragot / Macmillan, so I've ordered one copy
... the book will take a while to post itself to UK, so that's a project identified for later in the year...
Thanks again
Michael Bradley
