NavList:

Sean,

Double check your corr 2 for VEGA. If Z2 = 34 and A'= 38 then the correction is 18 rather than what you have at 12. The new Hc sum is now 36* 9'.

I'm not an advocate of the Nautical Almanac sight reduction tables. Too easy to make a mistake and impossible to do without a form. The same can be said for the Ageton method. Weems and Dreisonstok are easy to do mistake free without the use of a form and so get my vote for best short methods.

Greg Rudzinski

Re: Question Re: Position by Calculation
From: Greg Rudzinski
Date: 2014 Jan 8, 12:39 -0800
Sean,

Looks like the calculated altitude of VEGA is incorrect for your assumed longitude of 76* 28' W. I get Hc 36* 9.4' for an intercept of 3.1 toward. Investigate VEGA

Greg Rudzinski

Re: Question Re: Position by Calculation
From: Sean C
Date: 2014 Jan 8, 12:16 -0800
Greg,

Your plot is much closer to the actual position of 37°03!3N, 076°28!6W.

So, what do you think was the greatest source of error in my work?

Thanks!
Sean C.
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