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There is a section in the 229 for adjusting long intercepts to cause the LOP
to better approximate a COP.  See Introduction > C > Special Techniques > 1.

Bill


> Gary LaPook wrote:
> 
> Yes that is the case as far as practical accuracy is
> concerned. Theoretically, accuracy is improved with
> shorter intercepts because the LOP, which is treated
> as a great circle for practical navigation, is really
> a "small circle" which would cause increasingly large
> errors with very long intercepts. But in the real
> world, choosung an Alon within 1� of your location
> shouldn't result in any perceptable differenc. I know
> some purists might point to some extreme cases such as
> in polar navigation or very high altitude sights but
> the above is the generally true situation.
> --- Gary  wrote:
> 
>> 
>> I have begun with H.O. 229 and purchased vol 3.  Up
>> till now I don't
>> find it very confusing and enjoy the challenge of
>> looking up the data.
>> Thanks especially for the links to the Naut Alm. and
>> the calculators.
>> My biggest issue so far has been determining exactly
>> what to use for A
>> Long.  if the min are close it is a no brainer
>> however sometimes I feel
>> like I should choose differently.  i worked one
>> problem using a LHA of
>> 69 and one with 68 (for example) and found that I
>> got the same basic
>> answer once I plotted, just one intercept towards
>> and one away.  Would
>> that always be the case and therefore not as
>> critical a decision as I
>> have made it out to be??


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