NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Hughes Tables.
From: UNK
Date: 2009 Jul 12, 11:15 -0700
From: UNK
Date: 2009 Jul 12, 11:15 -0700
Additional to my mention of Weems in post 9082: Lt.Cdr. P.V.H. Weems was responsible for making suggestions to Mr. A.J. Hughes of Henry Hughes and Son, Ltd when on a visit to England in 1936 that resulted in the production by Hughes of what are, in my opinon, the best short-method tables which have been produced, i.e. "Hughes Tables for Sea and Air Navigation". First published in 1938. They are compact, being 10" x 6 1/2" (inches) (250 x 165mm) by 3/4" (18mm) thick; and contain other useful tables than sight reduction, such Meridional Parts and Traverse Tables. They provide a sight reduction to within 0.1 minute accuracy and though not as fast as using the Air tables AP3270, they are almost as fast and provide accuracy an order better than AP3270 which is rounded-up to one minute of arc. There is only one subtraction and four additions required of numbers taken from the tables. They are quite easy to use once the simple procedure is learned. Douglas Denny. Chcihester. England. -------------------------------------------------------- [Sent from archive by: douglas.denny-AT-btopenworld.com] --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---