NavList:

However, we can only guess which type of almanac Noonan was using and indeed which method of calculation he was using.  My point is; the lady gives herself away by using the Sun for an example of dire straits if the date is one day out (it only makes about 3 miles difference for the Sun, but about 60 miles for other stars, with a modern Air Almanac) unless she knows an awful lot more about Noonan’s methods and resources than we are giving her credit for.  DaveP

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But we do know what almanac Noonan was using, it was the American Natical Almanac for 1937. This is shown by the inventory of the contents of the plane after the crash on takeoff at Luke field in Honolulu. 

See:  https://tighar.org/Projects/Earhart/Archives/Documents/Luke_Field.html

Each page of Sun data contains data for twelve days, three colums of four days. July 2 and 3 are in column one of page 22. So going down the column for later shots,  how could you skip to a new day? We also know that Noonan always used Dreisonstok (HO 208) for his computations. See his letter to Weems, page 425, "Air Navigation, 1938."

https://sites.google.com/site/fredienoonan/resources/weems/weems-422-423.JPG?attredirects=0

https://sites.google.com/site/fredienoonan/resources/weems/weems-424-425.JPG?attredirects=0

gl

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