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    Re: Need help to track down errors
    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 Gebhart  wrote:
    > 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
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