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    Re: Cugle - longitude at sunrise and sunset
    From: h.a.c. van Asten
    Date: 2013 Apr 30, 16:50 -0700

    It is generally known that he always used "Navigation Tables for Mariners and Aviators" by Dreisonstok , H.O.no.208 . His methods can also be translated from earlier stages of the world flight , of which the annotated air charts were sent home before July 2 . Hence , H.O.208 , short method but very effective and accurate ,is the Work Book you refer to . Sunset-sunrise calculations are the only in consideration for our purpose , so consulting pages 73 and 77 plus occasionally the explanations suffices to get the work done .
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