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Hi John

I think I found the off by one problem.  Along the way, I realized that I had 
originally made a horrific shortcut.  The 57 navigational stars were only 
resolved to 1 degree in SHA and delination.  I used my Nautical Almanac to 
enter these numbers to nearest 1/10th of a minute.  I don't think this would 
make a terrific difference to the display, but it bothered me.  So I fixed 
it.

The extension line was easy, as is the arrowhead, I just haven't gotten around to it.

Making a slider bar work backwards (enter the number and watch the slider bar 
move to the new location) is well beyond Excel, at least to my understanding. 
 I could port this to almost any language under the sun, but keeping it in 
Excel leaves it accessible to most, and keeps it open source.  I wanted folks 
to see HOW it worked, not just see it work!

I flipped the controls around, and added some simplistic instructions.  I 
really like being able to move the blue templates from +90 to -90.  This is 
the non-intuitive, completely surprising fun part of the 2102E.  My only 
disappointment is in the shape of the longitude lines.  Excel runs out of gas 
when you have too many points to be manipulated, so I traded speed for 
beauty.  I realized that nobody would use it if it was too pokey slow.

I added Polaris and the "outer limits".  When in the Southern Hemisphere, of 
course Polaris rotates, just as it does in the Northern Hemisphere, its just 
hard to see there.  It's just a demonstration that the N Pole in the Southern 
Hemisphere is a circle, not a dot!

Best Regards
Brad
Brad
File: 
Azimuthal-Equidistant-Rev-9.xls



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