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Ron,

Welcome aboard!  Afraid I can't help you with Pub 249, just writing
to say welcome.  It's a lively bunch.

Fred Hebard

On Sep 9, 2007, at 8:44 PM, Ron Irwin wrote:

>
> On my 55th birthday my wife suggested I look for an
> opportunity to exercise my brain. As we get older
> mental exercise becomes more impotant.  Considering my
> love of sailing, celestial navigation seemed a natural
> quest. With the internet I was able to discover this
> incredible group with members of a caliber and
> knowledge I am humbled to address. Through Schlereth,
> Howell, Bowditch and others i have come to a grasp of
> the process but have a few questions on
> implementation.
>
> My question is in regards to the Polaris tables  in
> Pub 249.
>
> The formula as stated in in tha Almanac  = Ho -1
> degree + a0 +a1 + a2
>
>  I understand A0 and A3, and assume A2 is reflecting
> the oblation of the earth. But what is the -1 degree
> about?
>
> The further I get into this the more it fascinates me.
> I especially enjoyed the Shovell  discussions.
>
> Thank you,
>
> Ron Irwin
>
>
>
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