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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Need help to track down errors
From: Gary LaPook
Date: 2008 Nov 13, 02:02 -0800
From: Gary LaPook
Date: 2008 Nov 13, 02:02 -0800
Ken, You should also look at the "Error to Printed HO 249 Volume 2 " thread on October 20, 2008. gl On Nov 12, 4:08�pm, Ken Gebhartwrote: > To all List Members, > > Need help to track down errors! > > I have been made aware of �many errors on page 158 of Pub 249 Vol 2 � � > Apparently all of the Hc values on the page are wrong! �For example, � > for dec 0, LHA 0, Lat 26 (page 158), Hc is shown as 65 deg. When it � > should be 64 deg by simple inspection. �All the other numbers are � > also off by varying amounts as can be found by computation. �There � > are some other errors too, of a different kind on other pages. �For � > example, page 160. �Look at the column for dec 15 deg, and go down to � > LHA 98. �By simple inspection you can see that there should be a � > minus sign before Hc 00-25, but it is not there. �I believe this is � > typical of many Hcs �near zero. > > These errors are present in the US Government Edition, privately � > published editions, and the PDF on the NGA website. �I have spoken to � > the UK Almanac Office, and they report that the errors do not exist � > in their equivalent to 249 V2, or their Rapid Sight Reduction Tables, � > and can find no trace or knowledge of them. > > I am asking anyone who has an older copy of this volume, to check it � > for these errors and report the publication date. �Maybe we can track � > down when they first appeared. �By the way, a friend did phone the � > NGA to report this, and was told that �they would look into it�. > > Thanks, Ken Gebhart --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---