On 2008-01-24 15:35:16 -0500, Red said:

For those of you with good calculators...

http://williams.best.vwh.net/avform.htm

Or a spreadsheet program....

--
Jere Lull
Tanzer 28 #4 out of Tolchester, MD
Xan's pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI trips & tips: http://homepage.mac.com/jerelull/BVI/