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Subject: Re: [Nml] H.O 211 math error
From: Joe Shields (joeshields@XXX.XXX)
Date: Sat Feb 27 1999 - 00:43:43 EST
Many thanks for your responses. Kind of scarry that I could make such
an easy math error. I'm usually so concerned with possible errors in
the As and Bs looked up in H.O 211 that I guess I just kept
overlooking the error in LHA. I have H.O. 249, but am on a kick right
now to see how accurate I can get using the approx. Sun decl./Eq. of
Time table that came with my Mark 3 Davis sextant, the condensed
Ageton table (Bayless), and the altitude correction page and the time
to arc conversion page (both from the Nautical almanac). The whole
thing takes up 4 double-sided 8 1/2 * 11 sheets of paper. Re-doing
some sights using this bare-bones kit has opened my eyes as to how
accurate you can get with so little to carry around. That is, if one
can subtract correctly. Thanks again. -- Joe
---WSMurdoch@XXX.XXX wrote:
>
> Just looking at the numbers should the LHA be 11d 46' W rather than
9d 46' W ?
>
> I have a copy of Arthur A. Ageton, Manual of Celestial Navigation,
1961. In
> the preprinted forms for using the method, Admiral Ageton suffixes
both G.H.A.
> and L.H.A. with W. Granted it is unnecessary, but it is his method.
>
> The book is interesting as it gives a method for reducing sights
from not only
> the D.R. position as I learned in JN but also from an assumed
position.
>
> Does anyone know how Admiral Ageton pronounced his name. Was it
"age ton" or
> "aj a ton" ? I have heard both said.
>
> Bill Murdoch
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